diff --git a/generator.py b/generator.py
new file mode 100644
index 0000000..b572986
--- /dev/null
+++ b/generator.py
@@ -0,0 +1,2184 @@
+#!/usr/bin/python3 -i
+import os,re,sys
+
+def write( *args, **kwargs ):
+    file = kwargs.pop('file',sys.stdout)
+    end = kwargs.pop( 'end','\n')
+    file.write( ' '.join([str(arg) for arg in args]) )
+    file.write( end )
+
+# noneStr - returns string argument, or "" if argument is None.
+# Used in converting lxml Elements into text.
+#   str - string to convert
+def noneStr(str):
+    if (str):
+        return str
+    else:
+        return ""
+
+# enquote - returns string argument with surrounding quotes,
+#   for serialization into Python code.
+def enquote(str):
+    if (str):
+        return "'" + str + "'"
+    else:
+        return None
+
+# Primary sort key for regSortFeatures.
+# Sorts by category of the feature name string:
+#   Core API features (those defined with a <feature> tag)
+#   ARB/KHR/OES (Khronos extensions)
+#   other       (EXT/vendor extensions)
+# This will need changing for Vulkan!
+def regSortCategoryKey(feature):
+    if (feature.elem.tag == 'feature'):
+        return 0
+    elif (feature.category == 'ARB' or
+          feature.category == 'KHR' or
+          feature.category == 'OES'):
+        return 1
+    else:
+        return 2
+
+# Secondary sort key for regSortFeatures.
+# Sorts by extension name.
+def regSortNameKey(feature):
+    return feature.name
+
+# Second sort key for regSortFeatures.
+# Sorts by feature version. <extension> elements all have version number "0"
+def regSortFeatureVersionKey(feature):
+    return float(feature.version)
+
+# Tertiary sort key for regSortFeatures.
+# Sorts by extension number. <feature> elements all have extension number 0.
+def regSortExtensionNumberKey(feature):
+    return int(feature.number)
+
+# regSortFeatures - default sort procedure for features.
+# Sorts by primary key of feature category ('feature' or 'extension')
+#   then by version number (for features)
+#   then by extension number (for extensions)
+def regSortFeatures(featureList):
+    featureList.sort(key = regSortExtensionNumberKey)
+    featureList.sort(key = regSortFeatureVersionKey)
+    featureList.sort(key = regSortCategoryKey)
+
+# GeneratorOptions - base class for options used during header production
+# These options are target language independent, and used by
+# Registry.apiGen() and by base OutputGenerator objects.
+#
+# Members
+#   filename - name of file to generate, or None to write to stdout.
+#   apiname - string matching <api> 'apiname' attribute, e.g. 'gl'.
+#   profile - string specifying API profile , e.g. 'core', or None.
+#   versions - regex matching API versions to process interfaces for.
+#     Normally '.*' or '[0-9]\.[0-9]' to match all defined versions.
+#   emitversions - regex matching API versions to actually emit
+#    interfaces for (though all requested versions are considered
+#    when deciding which interfaces to generate). For GL 4.3 glext.h,
+#     this might be '1\.[2-5]|[2-4]\.[0-9]'.
+#   defaultExtensions - If not None, a string which must in its
+#     entirety match the pattern in the "supported" attribute of
+#     the <extension>. Defaults to None. Usually the same as apiname.
+#   addExtensions - regex matching names of additional extensions
+#     to include. Defaults to None.
+#   removeExtensions - regex matching names of extensions to
+#     remove (after defaultExtensions and addExtensions). Defaults
+#     to None.
+#   sortProcedure - takes a list of FeatureInfo objects and sorts
+#     them in place to a preferred order in the generated output.
+#     Default is core API versions, ARB/KHR/OES extensions, all
+#     other extensions, alphabetically within each group.
+# The regex patterns can be None or empty, in which case they match
+#   nothing.
+class GeneratorOptions:
+    """Represents options during header production from an API registry"""
+    def __init__(self,
+                 filename = None,
+                 apiname = None,
+                 profile = None,
+                 versions = '.*',
+                 emitversions = '.*',
+                 defaultExtensions = None,
+                 addExtensions = None,
+                 removeExtensions = None,
+                 sortProcedure = regSortFeatures):
+        self.filename          = filename
+        self.apiname           = apiname
+        self.profile           = profile
+        self.versions          = self.emptyRegex(versions)
+        self.emitversions      = self.emptyRegex(emitversions)
+        self.defaultExtensions = defaultExtensions
+        self.addExtensions     = self.emptyRegex(addExtensions)
+        self.removeExtensions  = self.emptyRegex(removeExtensions)
+        self.sortProcedure     = sortProcedure
+    #
+    # Substitute a regular expression which matches no version
+    # or extension names for None or the empty string.
+    def emptyRegex(self,pat):
+        if (pat == None or pat == ''):
+            return '_nomatch_^'
+        else:
+            return pat
+
+# CGeneratorOptions - subclass of GeneratorOptions.
+#
+# Adds options used by COutputGenerator objects during C language header
+# generation.
+#
+# Additional members
+#   prefixText - list of strings to prefix generated header with
+#     (usually a copyright statement + calling convention macros).
+#   protectFile - True if multiple inclusion protection should be
+#     generated (based on the filename) around the entire header.
+#   protectFeature - True if #ifndef..#endif protection should be
+#     generated around a feature interface in the header file.
+#   genFuncPointers - True if function pointer typedefs should be
+#     generated
+#   protectProto - If conditional protection should be generated
+#     around prototype declarations, set to either '#ifdef'
+#     to require opt-in (#ifdef protectProtoStr) or '#ifndef'
+#     to require opt-out (#ifndef protectProtoStr). Otherwise
+#     set to None.
+#   protectProtoStr - #ifdef/#ifndef symbol to use around prototype
+#     declarations, if protectProto is set
+#   apicall - string to use for the function declaration prefix,
+#     such as APICALL on Windows.
+#   apientry - string to use for the calling convention macro,
+#     in typedefs, such as APIENTRY.
+#   apientryp - string to use for the calling convention macro
+#     in function pointer typedefs, such as APIENTRYP.
+#   indentFuncProto - True if prototype declarations should put each
+#     parameter on a separate line
+#   indentFuncPointer - True if typedefed function pointers should put each
+#     parameter on a separate line
+#   alignFuncParam - if nonzero and parameters are being put on a
+#     separate line, align parameter names at the specified column
+class CGeneratorOptions(GeneratorOptions):
+    """Represents options during C interface generation for headers"""
+    def __init__(self,
+                 filename = None,
+                 apiname = None,
+                 profile = None,
+                 versions = '.*',
+                 emitversions = '.*',
+                 defaultExtensions = None,
+                 addExtensions = None,
+                 removeExtensions = None,
+                 sortProcedure = regSortFeatures,
+                 prefixText = "",
+                 genFuncPointers = True,
+                 protectFile = True,
+                 protectFeature = True,
+                 protectProto = None,
+                 protectProtoStr = None,
+                 apicall = '',
+                 apientry = '',
+                 apientryp = '',
+                 indentFuncProto = True,
+                 indentFuncPointer = False,
+                 alignFuncParam = 0):
+        GeneratorOptions.__init__(self, filename, apiname, profile,
+                                  versions, emitversions, defaultExtensions,
+                                  addExtensions, removeExtensions, sortProcedure)
+        self.prefixText      = prefixText
+        self.genFuncPointers = genFuncPointers
+        self.protectFile     = protectFile
+        self.protectFeature  = protectFeature
+        self.protectProto    = protectProto
+        self.protectProtoStr = protectProtoStr
+        self.apicall         = apicall
+        self.apientry        = apientry
+        self.apientryp       = apientryp
+        self.indentFuncProto = indentFuncProto
+        self.indentFuncPointer = indentFuncPointer
+        self.alignFuncParam  = alignFuncParam
+
+# DocGeneratorOptions - subclass of GeneratorOptions.
+#
+# Shares many members with CGeneratorOptions, since
+# both are writing C-style declarations:
+#
+#   prefixText - list of strings to prefix generated header with
+#     (usually a copyright statement + calling convention macros).
+#   apicall - string to use for the function declaration prefix,
+#     such as APICALL on Windows.
+#   apientry - string to use for the calling convention macro,
+#     in typedefs, such as APIENTRY.
+#   apientryp - string to use for the calling convention macro
+#     in function pointer typedefs, such as APIENTRYP.
+#   genDirectory - directory into which to generate include files
+#   indentFuncProto - True if prototype declarations should put each
+#     parameter on a separate line
+#   indentFuncPointer - True if typedefed function pointers should put each
+#     parameter on a separate line
+#   alignFuncParam - if nonzero and parameters are being put on a
+#     separate line, align parameter names at the specified column
+#
+# Additional members:
+#
+class DocGeneratorOptions(GeneratorOptions):
+    """Represents options during C interface generation for Asciidoc"""
+    def __init__(self,
+                 filename = None,
+                 apiname = None,
+                 profile = None,
+                 versions = '.*',
+                 emitversions = '.*',
+                 defaultExtensions = None,
+                 addExtensions = None,
+                 removeExtensions = None,
+                 sortProcedure = regSortFeatures,
+                 prefixText = "",
+                 apicall = '',
+                 apientry = '',
+                 apientryp = '',
+                 genDirectory = 'gen',
+                 indentFuncProto = True,
+                 indentFuncPointer = False,
+                 alignFuncParam = 0,
+                 expandEnumerants = True):
+        GeneratorOptions.__init__(self, filename, apiname, profile,
+                                  versions, emitversions, defaultExtensions,
+                                  addExtensions, removeExtensions, sortProcedure)
+        self.prefixText      = prefixText
+        self.apicall         = apicall
+        self.apientry        = apientry
+        self.apientryp       = apientryp
+        self.genDirectory    = genDirectory
+        self.indentFuncProto = indentFuncProto
+        self.indentFuncPointer = indentFuncPointer
+        self.alignFuncParam  = alignFuncParam
+        self.expandEnumerants = expandEnumerants
+
+# OutputGenerator - base class for generating API interfaces.
+# Manages basic logic, logging, and output file control
+# Derived classes actually generate formatted output.
+#
+# ---- methods ----
+# OutputGenerator(errFile, warnFile, diagFile)
+#   errFile, warnFile, diagFile - file handles to write errors,
+#     warnings, diagnostics to. May be None to not write.
+# logMsg(level, *args) - log messages of different categories
+#   level - 'error', 'warn', or 'diag'. 'error' will also
+#     raise a UserWarning exception
+#   *args - print()-style arguments
+# setExtMap(map) - specify a dictionary map from extension names to
+#   numbers, used in creating values for extension enumerants.
+# beginFile(genOpts) - start a new interface file
+#   genOpts - GeneratorOptions controlling what's generated and how
+# endFile() - finish an interface file, closing it when done
+# beginFeature(interface, emit) - write interface for a feature
+# and tag generated features as having been done.
+#   interface - element for the <version> / <extension> to generate
+#   emit - actually write to the header only when True
+# endFeature() - finish an interface.
+# genType(typeinfo,name) - generate interface for a type
+#   typeinfo - TypeInfo for a type
+# genStruct(typeinfo,name) - generate interface for a C "struct" type.
+#   typeinfo - TypeInfo for a type interpreted as a struct
+# genGroup(groupinfo,name) - generate interface for a group of enums (C "enum")
+#   groupinfo - GroupInfo for a group
+# genEnum(enuminfo, name) - generate interface for an enum (constant)
+#   enuminfo - EnumInfo for an enum
+#   name - enum name
+# genCmd(cmdinfo) - generate interface for a command
+#   cmdinfo - CmdInfo for a command
+# makeCDecls(cmd) - return C prototype and function pointer typedef for a
+#     <command> Element, as a list of two strings
+#   cmd - Element for the <command>
+# newline() - print a newline to the output file (utility function)
+#
+class OutputGenerator:
+    """Generate specified API interfaces in a specific style, such as a C header"""
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        self.outFile = None
+        self.errFile = errFile
+        self.warnFile = warnFile
+        self.diagFile = diagFile
+        # Internal state
+        self.featureName = None
+        self.genOpts = None
+        self.registry = None
+        # Used for extension enum value generation
+        self.extBase      = 1000000000
+        self.extBlockSize = 1000
+    #
+    # logMsg - write a message of different categories to different
+    #   destinations.
+    # level -
+    #   'diag' (diagnostic, voluminous)
+    #   'warn' (warning)
+    #   'error' (fatal error - raises exception after logging)
+    # *args - print()-style arguments to direct to corresponding log
+    def logMsg(self, level, *args):
+        """Log a message at the given level. Can be ignored or log to a file"""
+        if (level == 'error'):
+            strfile = io.StringIO()
+            write('ERROR:', *args, file=strfile)
+            if (self.errFile != None):
+                write(strfile.getvalue(), file=self.errFile)
+            raise UserWarning(strfile.getvalue())
+        elif (level == 'warn'):
+            if (self.warnFile != None):
+                write('WARNING:', *args, file=self.warnFile)
+        elif (level == 'diag'):
+            if (self.diagFile != None):
+                write('DIAG:', *args, file=self.diagFile)
+        else:
+            raise UserWarning(
+                '*** FATAL ERROR in Generator.logMsg: unknown level:' + level)
+    #
+    # enumToValue - parses and converts an <enum> tag into a value.
+    # Returns a list
+    #   first element - integer representation of the value, or None
+    #       if needsNum is False. The value must be a legal number
+    #       if needsNum is True.
+    #   second element - string representation of the value
+    # There are several possible representations of values.
+    #   A 'value' attribute simply contains the value.
+    #   A 'bitpos' attribute defines a value by specifying the bit
+    #       position which is set in that value.
+    #   A 'offset','extbase','extends' triplet specifies a value
+    #       as an offset to a base value defined by the specified
+    #       'extbase' extension name, which is then cast to the
+    #       typename specified by 'extends'. This requires probing
+    #       the registry database, and imbeds knowledge of the
+    #       Vulkan extension enum scheme in this function.
+    def enumToValue(self, elem, needsNum):
+        name = elem.get('name')
+        numVal = None
+        if ('value' in elem.keys()):
+            value = elem.get('value')
+            # print('About to translate value =', value, 'type =', type(value))
+            if (needsNum):
+                numVal = int(value, 0)
+            # If there's a non-integer, numeric 'type' attribute (e.g. 'u' or
+            # 'ull'), append it to the string value.
+            # t = enuminfo.elem.get('type')
+            # if (t != None and t != '' and t != 'i' and t != 's'):
+            #     value += enuminfo.type
+            self.logMsg('diag', 'Enum', name, '-> value [', numVal, ',', value, ']')
+            return [numVal, value]
+        if ('bitpos' in elem.keys()):
+            value = elem.get('bitpos')
+            numVal = int(value, 0)
+            numVal = 1 << numVal
+            value = '0x%08x' % numVal
+            self.logMsg('diag', 'Enum', name, '-> bitpos [', numVal, ',', value, ']')
+            return [numVal, value]
+        if ('offset' in elem.keys()):
+            # Obtain values in the mapping from the attributes
+            enumNegative = False
+            offset = int(elem.get('offset'),0)
+            extnumber = int(elem.get('extnumber'),0)
+            extends = elem.get('extends')
+            if ('dir' in elem.keys()):
+                enumNegative = True
+            self.logMsg('diag', 'Enum', name, 'offset =', offset,
+                'extnumber =', extnumber, 'extends =', extends,
+                'enumNegative =', enumNegative)
+            # Now determine the actual enumerant value, as defined
+            # in the "Layers and Extensions" appendix of the spec.
+            numVal = self.extBase + (extnumber - 1) * self.extBlockSize + offset
+            if (enumNegative):
+                numVal = -numVal
+            value = '%d' % numVal
+            # More logic needed!
+            self.logMsg('diag', 'Enum', name, '-> offset [', numVal, ',', value, ']')
+            return [numVal, value]
+        return [None, None]
+    #
+    def beginFile(self, genOpts):
+        self.genOpts = genOpts
+        #
+        # Open specified output file. Not done in constructor since a
+        # Generator can be used without writing to a file.
+        if (self.genOpts.filename != None):
+            self.outFile = open(self.genOpts.filename, 'w')
+        else:
+            self.outFile = sys.stdout
+    def endFile(self):
+        self.errFile and self.errFile.flush()
+        self.warnFile and self.warnFile.flush()
+        self.diagFile and self.diagFile.flush()
+        self.outFile.flush()
+        if (self.outFile != sys.stdout and self.outFile != sys.stderr):
+            self.outFile.close()
+        self.genOpts = None
+    #
+    def beginFeature(self, interface, emit):
+        self.emit = emit
+        self.featureName = interface.get('name')
+        # If there's an additional 'protect' attribute in the feature, save it
+        self.featureExtraProtect = interface.get('protect')
+    def endFeature(self):
+        # Derived classes responsible for emitting feature
+        self.featureName = None
+        self.featureExtraProtect = None
+    # Utility method to validate we're generating something only inside a
+    # <feature> tag
+    def validateFeature(self, featureType, featureName):
+        if (self.featureName == None):
+            raise UserWarning('Attempt to generate', featureType, name,
+                    'when not in feature')
+    #
+    # Type generation
+    def genType(self, typeinfo, name):
+        self.validateFeature('type', name)
+    #
+    # Struct (e.g. C "struct" type) generation
+    def genStruct(self, typeinfo, name):
+        self.validateFeature('struct', name)
+    #
+    # Group (e.g. C "enum" type) generation
+    def genGroup(self, groupinfo, name):
+        self.validateFeature('group', name)
+    #
+    # Enumerant (really, constant) generation
+    def genEnum(self, enuminfo, name):
+        self.validateFeature('enum', name)
+    #
+    # Command generation
+    def genCmd(self, cmd, name):
+        self.validateFeature('command', name)
+    #
+    # Utility functions - turn a <proto> <name> into C-language prototype
+    # and typedef declarations for that name.
+    # name - contents of <name> tag
+    # tail - whatever text follows that tag in the Element
+    def makeProtoName(self, name, tail):
+        return self.genOpts.apientry + name + tail
+    def makeTypedefName(self, name, tail):
+       return '(' + self.genOpts.apientryp + 'PFN_' + name + tail + ')'
+    #
+    # makeCParamDecl - return a string which is an indented, formatted
+    # declaration for a <param> or <member> block (e.g. function parameter
+    # or structure/union member).
+    # param - Element (<param> or <member>) to format
+    # aligncol - if non-zero, attempt to align the nested <name> element
+    #   at this column
+    def makeCParamDecl(self, param, aligncol):
+        paramdecl = '    ' + noneStr(param.text)
+        for elem in param:
+            text = noneStr(elem.text)
+            tail = noneStr(elem.tail)
+            if (elem.tag == 'name' and aligncol > 0):
+                self.logMsg('diag', 'Aligning parameter', elem.text, 'to column', self.genOpts.alignFuncParam)
+                # Align at specified column, if possible
+                paramdecl = paramdecl.rstrip()
+                oldLen = len(paramdecl)
+                paramdecl = paramdecl.ljust(aligncol)
+                newLen = len(paramdecl)
+                self.logMsg('diag', 'Adjust length of parameter decl from', oldLen, 'to', newLen, ':', paramdecl)
+            paramdecl += text + tail
+        return paramdecl
+    #
+    # getCParamTypeLength - return the length of the type field is an indented, formatted
+    # declaration for a <param> or <member> block (e.g. function parameter
+    # or structure/union member).
+    # param - Element (<param> or <member>) to identify
+    def getCParamTypeLength(self, param):
+        paramdecl = '    ' + noneStr(param.text)
+        for elem in param:
+            text = noneStr(elem.text)
+            tail = noneStr(elem.tail)
+            if (elem.tag == 'name'):
+                # Align at specified column, if possible
+                newLen = len(paramdecl.rstrip())
+                self.logMsg('diag', 'Identifying length of', elem.text, 'as', newLen)
+            paramdecl += text + tail
+        return newLen
+    #
+    # makeCDecls - return C prototype and function pointer typedef for a
+    #   command, as a two-element list of strings.
+    # cmd - Element containing a <command> tag
+    def makeCDecls(self, cmd):
+        """Generate C function pointer typedef for <command> Element"""
+        proto = cmd.find('proto')
+        params = cmd.findall('param')
+        # Begin accumulating prototype and typedef strings
+        pdecl = self.genOpts.apicall
+        tdecl = 'typedef '
+        #
+        # Insert the function return type/name.
+        # For prototypes, add APIENTRY macro before the name
+        # For typedefs, add (APIENTRY *<name>) around the name and
+        #   use the PFN_cmdnameproc naming convention.
+        # Done by walking the tree for <proto> element by element.
+        # lxml.etree has elem.text followed by (elem[i], elem[i].tail)
+        #   for each child element and any following text
+        # Leading text
+        pdecl += noneStr(proto.text)
+        tdecl += noneStr(proto.text)
+        # For each child element, if it's a <name> wrap in appropriate
+        # declaration. Otherwise append its contents and tail contents.
+        for elem in proto:
+            text = noneStr(elem.text)
+            tail = noneStr(elem.tail)
+            if (elem.tag == 'name'):
+                pdecl += self.makeProtoName(text, tail)
+                tdecl += self.makeTypedefName(text, tail)
+            else:
+                pdecl += text + tail
+                tdecl += text + tail
+        # Now add the parameter declaration list, which is identical
+        # for prototypes and typedefs. Concatenate all the text from
+        # a <param> node without the tags. No tree walking required
+        # since all tags are ignored.
+        # Uses: self.indentFuncProto
+        # self.indentFuncPointer
+        # self.alignFuncParam
+        # Might be able to doubly-nest the joins, e.g.
+        #   ','.join(('_'.join([l[i] for i in range(0,len(l))])
+        n = len(params)
+        # Indented parameters
+        if n > 0:
+            indentdecl = '(\n'
+            for i in range(0,n):
+                paramdecl = self.makeCParamDecl(params[i], self.genOpts.alignFuncParam)
+                if (i < n - 1):
+                    paramdecl += ',\n'
+                else:
+                    paramdecl += ');'
+                indentdecl += paramdecl
+        else:
+            indentdecl = '(void);'
+        # Non-indented parameters
+        paramdecl = '('
+        if n > 0:
+            for i in range(0,n):
+                paramdecl += ''.join([t for t in params[i].itertext()])
+                if (i < n - 1):
+                    paramdecl += ', '
+        else:
+            paramdecl += 'void'
+        paramdecl += ");";
+        return [ pdecl + indentdecl, tdecl + paramdecl ]
+    #
+    def newline(self):
+        write('', file=self.outFile)
+
+    def setRegistry(self, registry):
+        self.registry = registry
+        #
+
+# COutputGenerator - subclass of OutputGenerator.
+# Generates C-language API interfaces.
+#
+# ---- methods ----
+# COutputGenerator(errFile, warnFile, diagFile) - args as for
+#   OutputGenerator. Defines additional internal state.
+# ---- methods overriding base class ----
+# beginFile(genOpts)
+# endFile()
+# beginFeature(interface, emit)
+# endFeature()
+# genType(typeinfo,name)
+# genStruct(typeinfo,name)
+# genGroup(groupinfo,name)
+# genEnum(enuminfo, name)
+# genCmd(cmdinfo)
+class COutputGenerator(OutputGenerator):
+    """Generate specified API interfaces in a specific style, such as a C header"""
+    # This is an ordered list of sections in the header file.
+    TYPE_SECTIONS = ['include', 'define', 'basetype', 'handle', 'enum',
+                     'group', 'bitmask', 'funcpointer', 'struct']
+    ALL_SECTIONS = TYPE_SECTIONS + ['commandPointer', 'command']
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        OutputGenerator.__init__(self, errFile, warnFile, diagFile)
+        # Internal state - accumulators for different inner block text
+        self.sections = dict([(section, []) for section in self.ALL_SECTIONS])
+    #
+    def beginFile(self, genOpts):
+        OutputGenerator.beginFile(self, genOpts)
+        # C-specific
+        #
+        # Multiple inclusion protection & C++ wrappers.
+        if (genOpts.protectFile and self.genOpts.filename):
+            headerSym = '__' + re.sub('\.h', '_h_', os.path.basename(self.genOpts.filename))
+            write('#ifndef', headerSym, file=self.outFile)
+            write('#define', headerSym, '1', file=self.outFile)
+            self.newline()
+        write('#ifdef __cplusplus', file=self.outFile)
+        write('extern "C" {', file=self.outFile)
+        write('#endif', file=self.outFile)
+        self.newline()
+        #
+        # User-supplied prefix text, if any (list of strings)
+        if (genOpts.prefixText):
+            for s in genOpts.prefixText:
+                write(s, file=self.outFile)
+        #
+        # Some boilerplate describing what was generated - this
+        # will probably be removed later since the extensions
+        # pattern may be very long.
+        # write('/* Generated C header for:', file=self.outFile)
+        # write(' * API:', genOpts.apiname, file=self.outFile)
+        # if (genOpts.profile):
+        #     write(' * Profile:', genOpts.profile, file=self.outFile)
+        # write(' * Versions considered:', genOpts.versions, file=self.outFile)
+        # write(' * Versions emitted:', genOpts.emitversions, file=self.outFile)
+        # write(' * Default extensions included:', genOpts.defaultExtensions, file=self.outFile)
+        # write(' * Additional extensions included:', genOpts.addExtensions, file=self.outFile)
+        # write(' * Extensions removed:', genOpts.removeExtensions, file=self.outFile)
+        # write(' */', file=self.outFile)
+    def endFile(self):
+        # C-specific
+        # Finish C++ wrapper and multiple inclusion protection
+        self.newline()
+        write('#ifdef __cplusplus', file=self.outFile)
+        write('}', file=self.outFile)
+        write('#endif', file=self.outFile)
+        if (self.genOpts.protectFile and self.genOpts.filename):
+            self.newline()
+            write('#endif', file=self.outFile)
+        # Finish processing in superclass
+        OutputGenerator.endFile(self)
+    def beginFeature(self, interface, emit):
+        # Start processing in superclass
+        OutputGenerator.beginFeature(self, interface, emit)
+        # C-specific
+        # Accumulate includes, defines, types, enums, function pointer typedefs,
+        # end function prototypes separately for this feature. They're only
+        # printed in endFeature().
+        self.sections = dict([(section, []) for section in self.ALL_SECTIONS])
+    def endFeature(self):
+        # C-specific
+        # Actually write the interface to the output file.
+        if (self.emit):
+            self.newline()
+            if (self.genOpts.protectFeature):
+                write('#ifndef', self.featureName, file=self.outFile)
+            # If type declarations are needed by other features based on
+            # this one, it may be necessary to suppress the ExtraProtect,
+            # or move it below the 'for section...' loop.
+            if (self.featureExtraProtect != None):
+                write('#ifdef', self.featureExtraProtect, file=self.outFile)
+            write('#define', self.featureName, '1', file=self.outFile)
+            for section in self.TYPE_SECTIONS:
+                contents = self.sections[section]
+                if contents:
+                    write('\n'.join(contents), file=self.outFile)
+                    self.newline()
+            if (self.genOpts.genFuncPointers and self.sections['commandPointer']):
+                write('\n'.join(self.sections['commandPointer']), file=self.outFile)
+                self.newline()
+            if (self.sections['command']):
+                if (self.genOpts.protectProto):
+                    write(self.genOpts.protectProto,
+                          self.genOpts.protectProtoStr, file=self.outFile)
+                write('\n'.join(self.sections['command']), end='', file=self.outFile)
+                if (self.genOpts.protectProto):
+                    write('#endif', file=self.outFile)
+                else:
+                    self.newline()
+            if (self.featureExtraProtect != None):
+                write('#endif /*', self.featureExtraProtect, '*/', file=self.outFile)
+            if (self.genOpts.protectFeature):
+                write('#endif /*', self.featureName, '*/', file=self.outFile)
+        # Finish processing in superclass
+        OutputGenerator.endFeature(self)
+    #
+    # Append a definition to the specified section
+    def appendSection(self, section, text):
+        # self.sections[section].append('SECTION: ' + section + '\n')
+        self.sections[section].append(text)
+    #
+    # Type generation
+    def genType(self, typeinfo, name):
+        OutputGenerator.genType(self, typeinfo, name)
+        typeElem = typeinfo.elem
+        # If the type is a struct type, traverse the imbedded <member> tags
+        # generating a structure. Otherwise, emit the tag text.
+        category = typeElem.get('category')
+        if (category == 'struct' or category == 'union'):
+            self.genStruct(typeinfo, name)
+        else:
+            # Replace <apientry /> tags with an APIENTRY-style string
+            # (from self.genOpts). Copy other text through unchanged.
+            # If the resulting text is an empty string, don't emit it.
+            s = noneStr(typeElem.text)
+            for elem in typeElem:
+                if (elem.tag == 'apientry'):
+                    s += self.genOpts.apientry + noneStr(elem.tail)
+                else:
+                    s += noneStr(elem.text) + noneStr(elem.tail)
+            if s:
+                # Add extra newline after multi-line entries.
+                if '\n' in s:
+                    s += '\n'
+                self.appendSection(category, s)
+    #
+    # Struct (e.g. C "struct" type) generation.
+    # This is a special case of the <type> tag where the contents are
+    # interpreted as a set of <member> tags instead of freeform C
+    # C type declarations. The <member> tags are just like <param>
+    # tags - they are a declaration of a struct or union member.
+    # Only simple member declarations are supported (no nested
+    # structs etc.)
+    def genStruct(self, typeinfo, typeName):
+        OutputGenerator.genStruct(self, typeinfo, typeName)
+        body = 'typedef ' + typeinfo.elem.get('category') + ' ' + typeName + ' {\n'
+        # paramdecl = self.makeCParamDecl(typeinfo.elem, self.genOpts.alignFuncParam)
+        targetLen = 0;
+        for member in typeinfo.elem.findall('.//member'):
+            targetLen = max(targetLen, self.getCParamTypeLength(member))
+        for member in typeinfo.elem.findall('.//member'):
+            body += self.makeCParamDecl(member, targetLen + 4)
+            body += ';\n'
+        body += '} ' + typeName + ';\n'
+        self.appendSection('struct', body)
+    #
+    # Group (e.g. C "enum" type) generation.
+    # These are concatenated together with other types.
+    def genGroup(self, groupinfo, groupName):
+        OutputGenerator.genGroup(self, groupinfo, groupName)
+        groupElem = groupinfo.elem
+        # See if this group needs min/max/num/padding at end
+        expand = 'expand' in groupElem.keys()
+        if (expand):
+            expandPrefix = groupElem.get('expand')
+        # Prefix
+        body = "\ntypedef enum " + groupName + " {\n"
+
+        # Loop over the nested 'enum' tags. Keep track of the minimum and
+        # maximum numeric values, if they can be determined; but only for
+        # core API enumerants, not extension enumerants. This is inferred
+        # by looking for 'extends' attributes.
+        minName = None
+        for elem in groupElem.findall('enum'):
+            # Convert the value to an integer and use that to track min/max.
+            # Values of form -(number) are accepted but nothing more complex.
+            # Should catch exceptions here for more complex constructs. Not yet.
+            (numVal,strVal) = self.enumToValue(elem, True)
+            name = elem.get('name')
+            body += "    " + name + " = " + strVal + ",\n"
+            if (expand and elem.get('extends') is None):
+                if (minName == None):
+                    minName = maxName = name
+                    minValue = maxValue = numVal
+                elif (numVal < minValue):
+                    minName = name
+                    minValue = numVal
+                elif (numVal > maxValue):
+                    maxName = name
+                    maxValue = numVal
+        # Generate min/max value tokens and a range-padding enum. Need some
+        # additional padding to generate correct names...
+        if (expand):
+            body += "    " + expandPrefix + "_BEGIN_RANGE = " + minName + ",\n"
+            body += "    " + expandPrefix + "_END_RANGE = " + maxName + ",\n"
+            body += "    " + expandPrefix + "_RANGE_SIZE = (" + maxName + " - " + minName + " + 1),\n"
+            body += "    " + expandPrefix + "_MAX_ENUM = 0x7FFFFFFF\n"
+        # Postfix
+        body += "} " + groupName + ";"
+        if groupElem.get('type') == 'bitmask':
+            section = 'bitmask'
+        else:
+            section = 'group'
+        self.appendSection(section, body)
+    # Enumerant generation
+    # <enum> tags may specify their values in several ways, but are usually
+    # just integers.
+    def genEnum(self, enuminfo, name):
+        OutputGenerator.genEnum(self, enuminfo, name)
+        (numVal,strVal) = self.enumToValue(enuminfo.elem, False)
+        body = '#define ' + name.ljust(33) + ' ' + strVal
+        self.appendSection('enum', body)
+    #
+    # Command generation
+    def genCmd(self, cmdinfo, name):
+        OutputGenerator.genCmd(self, cmdinfo, name)
+        #
+        decls = self.makeCDecls(cmdinfo.elem)
+        self.appendSection('command', decls[0] + '\n')
+        if (self.genOpts.genFuncPointers):
+            self.appendSection('commandPointer', decls[1])
+
+# DocOutputGenerator - subclass of OutputGenerator.
+# Generates AsciiDoc includes with C-language API interfaces, for reference
+# pages and the Vulkan specification. Similar to COutputGenerator, but
+# each interface is written into a different file as determined by the
+# options, only actual C types are emitted, and none of the boilerplate
+# preprocessor code is emitted.
+#
+# ---- methods ----
+# DocOutputGenerator(errFile, warnFile, diagFile) - args as for
+#   OutputGenerator. Defines additional internal state.
+# ---- methods overriding base class ----
+# beginFile(genOpts)
+# endFile()
+# beginFeature(interface, emit)
+# endFeature()
+# genType(typeinfo,name)
+# genStruct(typeinfo,name)
+# genGroup(groupinfo,name)
+# genEnum(enuminfo, name)
+# genCmd(cmdinfo)
+class DocOutputGenerator(OutputGenerator):
+    """Generate specified API interfaces in a specific style, such as a C header"""
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        OutputGenerator.__init__(self, errFile, warnFile, diagFile)
+    #
+    def beginFile(self, genOpts):
+        OutputGenerator.beginFile(self, genOpts)
+    def endFile(self):
+        OutputGenerator.endFile(self)
+    def beginFeature(self, interface, emit):
+        # Start processing in superclass
+        OutputGenerator.beginFeature(self, interface, emit)
+    def endFeature(self):
+        # Finish processing in superclass
+        OutputGenerator.endFeature(self)
+    #
+    # Generate an include file
+    #
+    # directory - subdirectory to put file in
+    # basename - base name of the file
+    # contents - contents of the file (Asciidoc boilerplate aside)
+    def writeInclude(self, directory, basename, contents):
+        # Create file
+        filename = self.genOpts.genDirectory + '/' + directory + '/' + basename + '.txt'
+        self.logMsg('diag', '# Generating include file:', filename)
+        fp = open(filename, 'w')
+        # Asciidoc anchor
+        write('[[{0},{0}]]'.format(basename), file=fp)
+        write('["source","{basebackend@docbook:c++:cpp}",title=""]', file=fp)
+        write('------------------------------------------------------------------------------', file=fp)
+        write(contents, file=fp)
+        write('------------------------------------------------------------------------------', file=fp)
+        fp.close()
+    #
+    # Type generation
+    def genType(self, typeinfo, name):
+        OutputGenerator.genType(self, typeinfo, name)
+        typeElem = typeinfo.elem
+        # If the type is a struct type, traverse the imbedded <member> tags
+        # generating a structure. Otherwise, emit the tag text.
+        category = typeElem.get('category')
+        if (category == 'struct' or category == 'union'):
+            self.genStruct(typeinfo, name)
+        else:
+            # Replace <apientry /> tags with an APIENTRY-style string
+            # (from self.genOpts). Copy other text through unchanged.
+            # If the resulting text is an empty string, don't emit it.
+            s = noneStr(typeElem.text)
+            for elem in typeElem:
+                if (elem.tag == 'apientry'):
+                    s += self.genOpts.apientry + noneStr(elem.tail)
+                else:
+                    s += noneStr(elem.text) + noneStr(elem.tail)
+            if (len(s) > 0):
+                if (category == 'bitmask'):
+                    self.writeInclude('flags', name, s + '\n')
+                elif (category == 'enum'):
+                    self.writeInclude('enums', name, s + '\n')
+                elif (category == 'funcpointer'):
+                    self.writeInclude('funcpointers', name, s+ '\n')
+                else:
+                    self.logMsg('diag', '# NOT writing include file for type:',
+                        name, 'category: ', category)
+            else:
+                self.logMsg('diag', '# NOT writing empty include file for type', name)
+    #
+    # Struct (e.g. C "struct" type) generation.
+    # This is a special case of the <type> tag where the contents are
+    # interpreted as a set of <member> tags instead of freeform C
+    # C type declarations. The <member> tags are just like <param>
+    # tags - they are a declaration of a struct or union member.
+    # Only simple member declarations are supported (no nested
+    # structs etc.)
+    def genStruct(self, typeinfo, typeName):
+        OutputGenerator.genStruct(self, typeinfo, typeName)
+        s = 'typedef ' + typeinfo.elem.get('category') + ' ' + typeName + ' {\n'
+        # paramdecl = self.makeCParamDecl(typeinfo.elem, self.genOpts.alignFuncParam)
+        targetLen = 0;
+        for member in typeinfo.elem.findall('.//member'):
+            targetLen = max(targetLen, self.getCParamTypeLength(member))
+        for member in typeinfo.elem.findall('.//member'):
+            s += self.makeCParamDecl(member, targetLen + 4)
+            s += ';\n'
+        s += '} ' + typeName + ';'
+        self.writeInclude('structs', typeName, s)
+    #
+    # Group (e.g. C "enum" type) generation.
+    # These are concatenated together with other types.
+    def genGroup(self, groupinfo, groupName):
+        OutputGenerator.genGroup(self, groupinfo, groupName)
+        groupElem = groupinfo.elem
+        # See if this group needs min/max/num/padding at end
+        expand = self.genOpts.expandEnumerants and ('expand' in groupElem.keys())
+        if (expand):
+            expandPrefix = groupElem.get('expand')
+        # Prefix
+        s = "typedef enum " + groupName + " {\n"
+
+        # Loop over the nested 'enum' tags. Keep track of the minimum and
+        # maximum numeric values, if they can be determined.
+        minName = None
+        for elem in groupElem.findall('enum'):
+            # Convert the value to an integer and use that to track min/max.
+            # Values of form -(number) are accepted but nothing more complex.
+            # Should catch exceptions here for more complex constructs. Not yet.
+            (numVal,strVal) = self.enumToValue(elem, True)
+            name = elem.get('name')
+            s += "    " + name + " = " + strVal + ",\n"
+            if (expand and elem.get('extends') is None):
+                if (minName == None):
+                    minName = maxName = name
+                    minValue = maxValue = numVal
+                elif (numVal < minValue):
+                    minName = name
+                    minValue = numVal
+                elif (numVal > maxValue):
+                    maxName = name
+                    maxValue = numVal
+        # Generate min/max value tokens and a range-padding enum. Need some
+        # additional padding to generate correct names...
+        if (expand):
+            s += "\n"
+            s += "    " + expandPrefix + "_BEGIN_RANGE = " + minName + ",\n"
+            s += "    " + expandPrefix + "_END_RANGE = " + maxName + ",\n"
+            s += "    " + expandPrefix + "_NUM = (" + maxName + " - " + minName + " + 1),\n"
+            s += "    " + expandPrefix + "_MAX_ENUM = 0x7FFFFFFF\n"
+        # Postfix
+        s += "} " + groupName + ";"
+        self.writeInclude('enums', groupName, s)
+    # Enumerant generation
+    # <enum> tags may specify their values in several ways, but are usually
+    # just integers.
+    def genEnum(self, enuminfo, name):
+        OutputGenerator.genEnum(self, enuminfo, name)
+        (numVal,strVal) = self.enumToValue(enuminfo.elem, False)
+        s = '#define ' + name.ljust(33) + ' ' + strVal
+        self.logMsg('diag', '# NOT writing compile-time constant', name)
+        # self.writeInclude('consts', name, s)
+    #
+    # Command generation
+    def genCmd(self, cmdinfo, name):
+        OutputGenerator.genCmd(self, cmdinfo, name)
+        #
+        decls = self.makeCDecls(cmdinfo.elem)
+        self.writeInclude('protos', name, decls[0])
+
+# PyOutputGenerator - subclass of OutputGenerator.
+# Generates Python data structures describing API names.
+# Similar to DocOutputGenerator, but writes a single
+# file.
+#
+# ---- methods ----
+# PyOutputGenerator(errFile, warnFile, diagFile) - args as for
+#   OutputGenerator. Defines additional internal state.
+# ---- methods overriding base class ----
+# beginFile(genOpts)
+# endFile()
+# genType(typeinfo,name)
+# genStruct(typeinfo,name)
+# genGroup(groupinfo,name)
+# genEnum(enuminfo, name)
+# genCmd(cmdinfo)
+class PyOutputGenerator(OutputGenerator):
+    """Generate specified API interfaces in a specific style, such as a C header"""
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        OutputGenerator.__init__(self, errFile, warnFile, diagFile)
+    #
+    def beginFile(self, genOpts):
+        OutputGenerator.beginFile(self, genOpts)
+        for dict in [ 'flags', 'enums', 'structs', 'consts', 'enums',
+          'consts', 'protos', 'funcpointers' ]:
+            write(dict, '= {}', file=self.outFile)
+    def endFile(self):
+        OutputGenerator.endFile(self)
+    #
+    # Add a name from the interface
+    #
+    # dict - type of name (see beginFile above)
+    # name - name to add
+    # value - A serializable Python value for the name
+    def addName(self, dict, name, value=None):
+        write(dict + "['" + name + "'] = ", value, file=self.outFile)
+    #
+    # Type generation
+    # For 'struct' or 'union' types, defer to genStruct() to
+    #   add to the dictionary.
+    # For 'bitmask' types, add the type name to the 'flags' dictionary,
+    #   with the value being the corresponding 'enums' name defining
+    #   the acceptable flag bits.
+    # For 'enum' types, add the type name to the 'enums' dictionary,
+    #   with the value being '@STOPHERE@' (because this case seems
+    #   never to happen).
+    # For 'funcpointer' types, add the type name to the 'funcpointers'
+    #   dictionary.
+    # For 'handle' and 'define' types, add the handle or #define name
+    #   to the 'struct' dictionary, because that's how the spec sources
+    #   tag these types even though they aren't structs.
+    def genType(self, typeinfo, name):
+        OutputGenerator.genType(self, typeinfo, name)
+        typeElem = typeinfo.elem
+        # If the type is a struct type, traverse the imbedded <member> tags
+        # generating a structure. Otherwise, emit the tag text.
+        category = typeElem.get('category')
+        if (category == 'struct' or category == 'union'):
+            self.genStruct(typeinfo, name)
+        else:
+            # Extract the type name
+            # (from self.genOpts). Copy other text through unchanged.
+            # If the resulting text is an empty string, don't emit it.
+            count = len(noneStr(typeElem.text))
+            for elem in typeElem:
+                count += len(noneStr(elem.text)) + len(noneStr(elem.tail))
+            if (count > 0):
+                if (category == 'bitmask'):
+                    requiredEnum = typeElem.get('requires')
+                    self.addName('flags', name, enquote(requiredEnum))
+                elif (category == 'enum'):
+                    # This case never seems to come up!
+                    # @enums   C 'enum' name           Dictionary of enumerant names
+                    self.addName('enums', name, enquote('@STOPHERE@'))
+                elif (category == 'funcpointer'):
+                    self.addName('funcpointers', name, None)
+                elif (category == 'handle' or category == 'define'):
+                    self.addName('structs', name, None)
+                else:
+                    write('# Unprocessed type:', name, 'category:', category, file=self.outFile)
+            else:
+                write('# Unprocessed type:', name, file=self.outFile)
+    #
+    # Struct (e.g. C "struct" type) generation.
+    #
+    # Add the struct name to the 'structs' dictionary, with the
+    # value being an ordered list of the struct member names.
+    def genStruct(self, typeinfo, typeName):
+        OutputGenerator.genStruct(self, typeinfo, typeName)
+
+        members = [member.text for member in typeinfo.elem.findall('.//member/name')]
+        self.addName('structs', typeName, members)
+    #
+    # Group (e.g. C "enum" type) generation.
+    # These are concatenated together with other types.
+    #
+    # Add the enum type name to the 'enums' dictionary, with
+    #   the value being an ordered list of the enumerant names.
+    # Add each enumerant name to the 'consts' dictionary, with
+    #   the value being the enum type the enumerant is part of.
+    def genGroup(self, groupinfo, groupName):
+        OutputGenerator.genGroup(self, groupinfo, groupName)
+        groupElem = groupinfo.elem
+
+        # @enums   C 'enum' name           Dictionary of enumerant names
+        # @consts  C enumerant/const name  Name of corresponding 'enums' key
+
+        # Loop over the nested 'enum' tags. Keep track of the minimum and
+        # maximum numeric values, if they can be determined.
+        enumerants = [elem.get('name') for elem in groupElem.findall('enum')]
+        for name in enumerants:
+            self.addName('consts', name, enquote(groupName))
+        self.addName('enums', groupName, enumerants)
+    # Enumerant generation (compile-time constants)
+    #
+    # Add the constant name to the 'consts' dictionary, with the
+    #   value being None to indicate that the constant isn't
+    #   an enumeration value.
+    def genEnum(self, enuminfo, name):
+        OutputGenerator.genEnum(self, enuminfo, name)
+
+        # @consts  C enumerant/const name  Name of corresponding 'enums' key
+
+        self.addName('consts', name, None)
+    #
+    # Command generation
+    #
+    # Add the command name to the 'protos' dictionary, with the
+    #   value being an ordered list of the parameter names.
+    def genCmd(self, cmdinfo, name):
+        OutputGenerator.genCmd(self, cmdinfo, name)
+
+        params = [param.text for param in cmdinfo.elem.findall('param/name')]
+        self.addName('protos', name, params)
+
+# ValidityOutputGenerator - subclass of OutputGenerator.
+# Generates AsciiDoc includes of valid usage information, for reference
+# pages and the Vulkan specification. Similar to DocOutputGenerator.
+#
+# ---- methods ----
+# ValidityOutputGenerator(errFile, warnFile, diagFile) - args as for
+#   OutputGenerator. Defines additional internal state.
+# ---- methods overriding base class ----
+# beginFile(genOpts)
+# endFile()
+# beginFeature(interface, emit)
+# endFeature()
+# genCmd(cmdinfo)
+class ValidityOutputGenerator(OutputGenerator):
+    """Generate specified API interfaces in a specific style, such as a C header"""
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        OutputGenerator.__init__(self, errFile, warnFile, diagFile)
+
+    def beginFile(self, genOpts):
+        OutputGenerator.beginFile(self, genOpts)
+    def endFile(self):
+        OutputGenerator.endFile(self)
+    def beginFeature(self, interface, emit):
+        # Start processing in superclass
+        OutputGenerator.beginFeature(self, interface, emit)
+    def endFeature(self):
+        # Finish processing in superclass
+        OutputGenerator.endFeature(self)
+
+    def makeParameterName(self, name):
+        return 'pname:' + name
+
+    def makeStructName(self, name):
+        return 'sname:' + name
+
+    def makeBaseTypeName(self, name):
+        return 'basetype:' + name
+
+    def makeEnumerationName(self, name):
+        return 'elink:' + name
+
+    def makeEnumerantName(self, name):
+        return 'ename:' + name
+
+    def makeFLink(self, name):
+        return 'flink:' + name
+
+    #
+    # Generate an include file
+    #
+    # directory - subdirectory to put file in
+    # basename - base name of the file
+    # contents - contents of the file (Asciidoc boilerplate aside)
+    def writeInclude(self, directory, basename, validity, threadsafety, commandpropertiesentry, successcodes, errorcodes):
+        # Create file
+        filename = self.genOpts.genDirectory + '/' + directory + '/' + basename + '.txt'
+        self.logMsg('diag', '# Generating include file:', filename)
+        fp = open(filename, 'w')
+        # Asciidoc anchor
+
+        # Valid Usage
+        if validity is not None:
+            write('.Valid Usage', file=fp)
+            write('*' * 80, file=fp)
+            write(validity, file=fp, end='')
+            write('*' * 80, file=fp)
+            write('', file=fp)
+
+        # Host Synchronization
+        if threadsafety is not None:
+            write('.Host Synchronization', file=fp)
+            write('*' * 80, file=fp)
+            write(threadsafety, file=fp, end='')
+            write('*' * 80, file=fp)
+            write('', file=fp)
+            
+        # Command Properties - contained within a block, to avoid table numbering
+        if commandpropertiesentry is not None:
+            write('.Command Properties', file=fp)
+            write('*' * 80, file=fp)
+            write('[options="header", width="100%"]', file=fp)
+            write('|=====================', file=fp)
+            write('|Command Buffer Levels|Render Pass Scope|Supported Queue Types', file=fp)
+            write(commandpropertiesentry, file=fp)
+            write('|=====================', file=fp)
+            write('*' * 80, file=fp)
+            write('', file=fp)
+
+        # Success Codes - contained within a block, to avoid table numbering
+        if successcodes is not None or errorcodes is not None:
+            write('.Return Codes', file=fp)
+            write('*' * 80, file=fp)
+            if successcodes is not None:
+                write('<<fundamentals-successcodes,Success>>::', file=fp)
+                write(successcodes, file=fp)
+            if errorcodes is not None:
+                write('<<fundamentals-errorcodes,Failure>>::', file=fp)
+                write(errorcodes, file=fp)
+            write('*' * 80, file=fp)
+            write('', file=fp)
+            
+        fp.close()
+
+    #
+    # Check if the parameter passed in is a pointer
+    def paramIsPointer(self, param):
+        ispointer = False
+        paramtype = param.find('type')
+        if paramtype.tail is not None and '*' in paramtype.tail:
+            ispointer = True
+
+        return ispointer
+
+    #
+    # Check if the parameter passed in is a static array
+    def paramIsStaticArray(self, param):
+        if param.find('name').tail is not None:
+            if param.find('name').tail[0] == '[':
+                return True
+
+    #
+    # Get the length of a parameter that's been identified as a static array
+    def staticArrayLength(self, param):
+        paramname = param.find('name')
+        paramenumsize = param.find('enum')
+
+        if paramenumsize is not None:
+            return paramenumsize.text
+        else:
+            return paramname.tail[1:-1]
+
+    #
+    # Check if the parameter passed in is a pointer to an array
+    def paramIsArray(self, param):
+        return param.attrib.get('len') is not None
+
+    #
+    # Get the parent of a handle object
+    def getHandleParent(self, typename):
+        types = self.registry.findall("types/type")
+        for elem in types:
+            if (elem.find("name") is not None and elem.find('name').text == typename) or elem.attrib.get('name') == typename:
+                return elem.attrib.get('parent')
+
+    #
+    # Check if a parent object is dispatchable or not
+    def isHandleTypeDispatchable(self, handlename):
+        handle = self.registry.find("types/type/[name='" + handlename + "'][@category='handle']")
+        if handle is not None and handle.find('type').text == 'VK_DEFINE_HANDLE':
+            return True
+        else:
+            return False
+
+    def isHandleOptional(self, param, params):
+
+        # See if the handle is optional
+        isOptional = False
+
+        # Simple, if it's optional, return true
+        if param.attrib.get('optional') is not None:
+            return True
+
+        # If no validity is being generated, it usually means that validity is complex and not absolute, so let's say yes.
+        if param.attrib.get('noautovalidity') is not None:
+            return True
+
+        # If the parameter is an array and we haven't already returned, find out if any of the len parameters are optional
+        if self.paramIsArray(param):
+            lengths = param.attrib.get('len').split(',')
+            for length in lengths:
+                if (length) != 'null-terminated' and (length) != '1':
+                    for otherparam in params:
+                        if otherparam.find('name').text == length:
+                            if otherparam.attrib.get('optional') is not None:
+                                return True
+
+        return False
+    #
+    # Get the category of a type
+    def getTypeCategory(self, typename):
+        types = self.registry.findall("types/type")
+        for elem in types:
+            if (elem.find("name") is not None and elem.find('name').text == typename) or elem.attrib.get('name') == typename:
+                return elem.attrib.get('category')
+
+    #
+    # Make a chunk of text for the end of a parameter if it is an array
+    def makeAsciiDocPreChunk(self, param, params):
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        # General pre-amble. Check optionality and add stuff.
+        asciidoc = '* '
+
+        if self.paramIsStaticArray(param):
+            asciidoc += 'Any given element of '
+
+        elif self.paramIsArray(param):
+            lengths = param.attrib.get('len').split(',')
+
+            # Find all the parameters that are called out as optional, so we can document that they might be zero, and the array may be ignored
+            optionallengths = []
+            for length in lengths:
+                if (length) != 'null-terminated' and (length) != '1':
+                    for otherparam in params:
+                        if otherparam.find('name').text == length:
+                            if otherparam.attrib.get('optional') is not None:
+                                if self.paramIsPointer(otherparam):
+                                    optionallengths.append('the value referenced by ' + self.makeParameterName(length))
+                                else:
+                                    optionallengths.append(self.makeParameterName(length))
+
+            # Document that these arrays may be ignored if any of the length values are 0
+            if len(optionallengths) != 0 or param.attrib.get('optional') is not None:
+                asciidoc += 'If '
+
+
+                if len(optionallengths) != 0:
+                    if len(optionallengths) == 1:
+
+                        asciidoc += optionallengths[0]
+                        asciidoc += ' is '
+
+                    else:
+                        asciidoc += ' or '.join(optionallengths)
+                        asciidoc += ' are '
+
+                    asciidoc += 'not `0`, '
+
+                if len(optionallengths) != 0 and param.attrib.get('optional') is not None:
+                    asciidoc += 'and '
+
+                if param.attrib.get('optional') is not None:
+                    asciidoc += self.makeParameterName(paramname.text)
+                    asciidoc += ' is not `NULL`, '
+
+        elif param.attrib.get('optional') is not None:
+            # Don't generate this stub for bitflags
+            if self.getTypeCategory(paramtype.text) != 'bitmask':
+                if param.attrib.get('optional').split(',')[0] == 'true':
+                    asciidoc += 'If '
+                    asciidoc += self.makeParameterName(paramname.text)
+                    asciidoc += ' is not '
+                    if self.paramIsArray(param) or self.paramIsPointer(param) or self.isHandleTypeDispatchable(paramtype.text):
+                        asciidoc += '`NULL`'
+                    elif self.getTypeCategory(paramtype.text) == 'handle':
+                        asciidoc += 'sname:VK_NULL_HANDLE'
+                    else:
+                        asciidoc += '`0`'
+
+                    asciidoc += ', '
+
+        return asciidoc
+
+    #
+    # Make the generic asciidoc line chunk portion used for all parameters.
+    # May return an empty string if nothing to validate.
+    def createValidationLineForParameterIntroChunk(self, param, params, typetext):
+        asciidoc = ''
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        asciidoc += self.makeAsciiDocPreChunk(param, params)
+
+        asciidoc += self.makeParameterName(paramname.text)
+        asciidoc += ' must: be '
+
+        if self.paramIsArray(param):
+            # Arrays. These are hard to get right, apparently
+
+            lengths = param.attrib.get('len').split(',')
+
+            if (lengths[0]) == 'null-terminated':
+                asciidoc += 'a null-terminated '
+            elif (lengths[0]) == '1':
+                asciidoc += 'a pointer to '
+            else:
+                asciidoc += 'a pointer to an array of '
+
+                # Handle equations, which are currently denoted with latex
+                if 'latexmath:' in lengths[0]:
+                    asciidoc += lengths[0]
+                else:
+                    asciidoc += self.makeParameterName(lengths[0])
+                asciidoc += ' '
+
+            for length in lengths[1:]:
+                if (length) == 'null-terminated': # This should always be the last thing. If it ever isn't for some bizarre reason, then this will need some massaging.
+                    asciidoc += 'null-terminated '
+                elif (length) == '1':
+                    asciidoc += 'pointers to '
+                else:
+                    asciidoc += 'pointers to arrays of '
+                    # Handle equations, which are currently denoted with latex
+                    if 'latex:' in length:
+                        asciidoc += length
+                    else:
+                        asciidoc += self.makeParameterName(length)
+                    asciidoc += ' '
+
+            # Void pointers don't actually point at anything - remove the word "to"
+            if paramtype.text == 'void':
+                if lengths[-1] == '1':
+                    if len(lengths) > 1:
+                        asciidoc = asciidoc[:-5]    # Take care of the extra s added by the post array chunk function. #HACK#
+                    else:
+                        asciidoc = asciidoc[:-4]
+                else:
+                    # An array of void values is a byte array.
+                    asciidoc += 'byte'
+
+            elif paramtype.text == 'char':
+                # A null terminated array of chars is a string
+                if lengths[-1] == 'null-terminated':
+                    asciidoc += 'string'
+                else:
+                    # Else it's just a bunch of chars
+                    asciidoc += 'char value'
+            elif param.text is not None:
+                # If a value is "const" that means it won't get modified, so it must be valid going into the function.
+                if 'const' in param.text:
+                    typecategory = self.getTypeCategory(paramtype.text)
+                    if (typecategory != 'struct' and typecategory != 'union' and typecategory != 'basetype' and typecategory is not None) or not self.isStructAlwaysValid(paramtype.text):
+                        asciidoc += 'valid '
+
+            asciidoc += typetext
+
+            # pluralize
+            if len(lengths) > 1 or (lengths[0] != '1' and lengths[0] != 'null-terminated'):
+                asciidoc += 's'
+
+        elif self.paramIsPointer(param):
+            # Handle pointers - which are really special case arrays (i.e. they don't have a length)
+            pointercount = paramtype.tail.count('*')
+
+            # Could be multi-level pointers (e.g. ppData - pointer to a pointer). Handle that.
+            for i in range(0, pointercount):
+                asciidoc += 'a pointer to '
+
+            if paramtype.text == 'void':
+                # If there's only one pointer, it's optional, and it doesn't point at anything in particular - we don't need any language.
+                if pointercount == 1 and param.attrib.get('optional') is not None:
+                    return '' # early return
+                else:
+                    # Pointer to nothing in particular - delete the " to " portion
+                    asciidoc = asciidoc[:-4]
+            else:
+                # Add an article for English semantic win
+                asciidoc += 'a '
+
+            # If a value is "const" that means it won't get modified, so it must be valid going into the function.
+            if param.text is not None and paramtype.text != 'void':
+                if 'const' in param.text:
+                    asciidoc += 'valid '
+
+            asciidoc += typetext
+
+        else:
+            # Non-pointer, non-optional things must be valid
+            asciidoc += 'a valid '
+            asciidoc += typetext
+
+        if asciidoc != '':
+            asciidoc += '\n'
+
+            # Add additional line for non-optional bitmasks
+            if self.getTypeCategory(paramtype.text) == 'bitmask':
+                if param.attrib.get('optional') is None:
+                    asciidoc += '* '
+                    if self.paramIsArray(param):
+                        asciidoc += 'Each element of '
+                    asciidoc += 'pname:'
+                    asciidoc += paramname.text
+                    asciidoc += ' mustnot: be `0`'
+                    asciidoc += '\n'
+
+        return asciidoc
+
+    def makeAsciiDocLineForParameter(self, param, params, typetext):
+        if param.attrib.get('noautovalidity') is not None:
+            return ''
+        asciidoc  = self.createValidationLineForParameterIntroChunk(param, params, typetext)
+
+        return asciidoc
+
+    # Try to do check if a structure is always considered valid (i.e. there's no rules to its acceptance)
+    def isStructAlwaysValid(self, structname):
+
+        struct = self.registry.find("types/type[@name='" + structname + "']")
+
+        params = struct.findall('member')
+        validity = struct.find('validity')
+
+        if validity is not None:
+            return False
+
+        for param in params:
+            paramname = param.find('name')
+            paramtype = param.find('type')
+            typecategory = self.getTypeCategory(paramtype.text)
+
+            if paramname.text == 'pNext':
+                return False
+
+            if paramname.text == 'sType':
+                return False
+
+            if paramtype.text == 'void' or paramtype.text == 'char' or self.paramIsArray(param) or self.paramIsPointer(param):
+                if self.makeAsciiDocLineForParameter(param, params, '') != '':
+                    return False
+            elif typecategory == 'handle' or typecategory == 'enum' or typecategory == 'bitmask' or param.attrib.get('returnedonly') == 'true':
+                return False
+            elif typecategory == 'struct' or typecategory == 'union':
+                if self.isStructAlwaysValid(paramtype.text) is False:
+                    return False
+
+        return True
+
+    #
+    # Make an entire asciidoc line for a given parameter
+    def createValidationLineForParameter(self, param, params, typecategory):
+        asciidoc = ''
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        if paramtype.text == 'void' or paramtype.text == 'char':
+            # Chars and void are special cases - needs care inside the generator functions
+            # A null-terminated char array is a string, else it's chars.
+            # An array of void values is a byte array, a void pointer is just a pointer to nothing in particular
+            asciidoc += self.makeAsciiDocLineForParameter(param, params, '')
+        elif typecategory == 'bitmask':
+            bitsname = paramtype.text.replace('Flags', 'FlagBits')
+            if self.registry.find("enums[@name='" + bitsname + "']") is None:
+                asciidoc += '* '
+                asciidoc += self.makeParameterName(paramname.text)
+                asciidoc += ' must: be `0`'
+                asciidoc += '\n'
+            else:
+                if self.paramIsArray(param):
+                    asciidoc += self.makeAsciiDocLineForParameter(param, params, 'combinations of ' + self.makeEnumerationName(bitsname) + ' value')
+                else:
+                    asciidoc += self.makeAsciiDocLineForParameter(param, params, 'combination of ' + self.makeEnumerationName(bitsname) + ' values')
+        elif typecategory == 'handle':
+            asciidoc += self.makeAsciiDocLineForParameter(param, params, self.makeStructName(paramtype.text) + ' handle')
+        elif typecategory == 'enum':
+            asciidoc += self.makeAsciiDocLineForParameter(param, params, self.makeEnumerationName(paramtype.text) + ' value')
+        elif typecategory == 'struct':
+            if (self.paramIsArray(param) or self.paramIsPointer(param)) or not self.isStructAlwaysValid(paramtype.text):
+                asciidoc += self.makeAsciiDocLineForParameter(param, params, self.makeStructName(paramtype.text) + ' structure')
+        elif typecategory == 'union':
+            if (self.paramIsArray(param) or self.paramIsPointer(param)) or not self.isStructAlwaysValid(paramtype.text):
+                asciidoc += self.makeAsciiDocLineForParameter(param, params, self.makeStructName(paramtype.text) + ' union')
+        elif self.paramIsArray(param) or self.paramIsPointer(param):
+            asciidoc += self.makeAsciiDocLineForParameter(param, params, self.makeBaseTypeName(paramtype.text) + ' value')
+
+        return asciidoc
+
+    #
+    # Make an asciidoc validity entry for a handle's parent object
+    def makeAsciiDocHandleParent(self, param, params):
+        asciidoc = ''
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        # Deal with handle parents
+        handleparent = self.getHandleParent(paramtype.text)
+        if handleparent is not None:
+            parentreference = None
+            for otherparam in params:
+                if otherparam.find('type').text == handleparent:
+                    parentreference = otherparam.find('name').text
+            if parentreference is not None:
+                asciidoc += '* '
+
+                if self.isHandleOptional(param, params):
+                    if self.paramIsArray(param):
+                        asciidoc += 'Each element of '
+                        asciidoc += self.makeParameterName(paramname.text)
+                        asciidoc += ' that is a valid handle'
+                    else:
+                        asciidoc += 'If '
+                        asciidoc += self.makeParameterName(paramname.text)
+                        asciidoc += ' is a valid handle, it'
+                else:
+                    if self.paramIsArray(param):
+                        asciidoc += 'Each element of '
+                    asciidoc += self.makeParameterName(paramname.text)
+                asciidoc += ' must: have been created, allocated or retrieved from '
+                asciidoc += self.makeParameterName(parentreference)
+
+                asciidoc += '\n'
+        return asciidoc
+
+    #
+    # Generate an asciidoc validity line for the sType value of a struct
+    def makeStructureType(self, blockname, param):
+        asciidoc = '* '
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        asciidoc += self.makeParameterName(paramname.text)
+        asciidoc += ' must: be '
+
+        structuretype = ''
+        for elem in re.findall(r'(([A-Z][a-z]+)|([A-Z][A-Z]+))', blockname):
+            if elem[0] == 'Vk':
+                structuretype += 'VK_STRUCTURE_TYPE_'
+            else:
+                structuretype += elem[0].upper()
+                structuretype += '_'
+
+        asciidoc += self.makeEnumerantName(structuretype[:-1])
+        asciidoc += '\n'
+
+        return asciidoc
+
+    #
+    # Generate an asciidoc validity line for the pNext value of a struct
+    def makeStructureExtensionPointer(self, param):
+        asciidoc = '* '
+        paramname = param.find('name')
+        paramtype = param.find('type')
+
+        asciidoc += self.makeParameterName(paramname.text)
+
+        validextensionstructs = param.attrib.get('validextensionstructs')
+        if validextensionstructs is None:
+            asciidoc += ' must: be `NULL`'
+        else:
+            extensionstructs = validextensionstructs.split(',')
+            asciidoc += ' must: point to one of ' + extensionstructs[:-1].join(', ') + ' or ' + extensionstructs[-1] + 'if the extension that introduced them is enabled '
+
+        asciidoc += '\n'
+
+        return asciidoc
+
+    #
+    # Generate all the valid usage information for a given struct or command
+    def makeValidUsageStatements(self, cmd, blockname, params, usages):
+        # Start the asciidoc block for this
+        asciidoc = ''
+
+        handles = []
+        anyparentedhandlesoptional = False
+        parentdictionary = {}
+        arraylengths = set()
+        for param in params:
+            paramname = param.find('name')
+            paramtype = param.find('type')
+
+            # Get the type's category
+            typecategory = self.getTypeCategory(paramtype.text)
+
+            # Generate language to independently validate a parameter
+            if paramtype.text == 'VkStructureType' and paramname.text == 'sType':
+                asciidoc += self.makeStructureType(blockname, param)
+            elif paramtype.text == 'void' and paramname.text == 'pNext':
+                asciidoc += self.makeStructureExtensionPointer(param)
+            else:
+                asciidoc += self.createValidationLineForParameter(param, params, typecategory)
+
+            # Ensure that any parenting is properly validated, and list that a handle was found
+            if typecategory == 'handle':
+                # Don't detect a parent for return values!
+                if not self.paramIsPointer(param) or (param.text is not None and 'const' in param.text):
+                    parent = self.getHandleParent(paramtype.text)
+                    if parent is not None:
+                        handles.append(param)
+
+                        # If any param is optional, it affects the output
+                        if self.isHandleOptional(param, params):
+                            anyparentedhandlesoptional = True
+
+                        # Find the first dispatchable parent
+                        ancestor = parent
+                        while ancestor is not None and not self.isHandleTypeDispatchable(ancestor):
+                            ancestor = self.getHandleParent(ancestor)
+
+                        # If one was found, add this parameter to the parent dictionary
+                        if ancestor is not None:
+                            if ancestor not in parentdictionary:
+                                parentdictionary[ancestor] = []
+
+                            if self.paramIsArray(param):
+                                parentdictionary[ancestor].append('the elements of ' + self.makeParameterName(paramname.text))
+                            else:
+                                parentdictionary[ancestor].append(self.makeParameterName(paramname.text))
+
+            # Get the array length for this parameter
+            arraylength = param.attrib.get('len')
+            if arraylength is not None:
+                for onelength in arraylength.split(','):
+                    arraylengths.add(onelength)
+
+        # For any vkQueue* functions, there might be queue type data
+        if 'vkQueue' in blockname:
+            # The queue type must be valid
+            queuetypes = cmd.attrib.get('queues')
+            if queuetypes is not None:
+                queuebits = []
+                for queuetype in re.findall(r'([^,]+)', queuetypes):
+                    queuebits.append(queuetype.replace('_',' '))
+
+                asciidoc += '* '
+                asciidoc += 'The pname:queue must: support '
+                if len(queuebits) == 1:
+                    asciidoc += queuebits[0]
+                else:
+                    asciidoc += (', ').join(queuebits[:-1])
+                    asciidoc += ' or '
+                    asciidoc += queuebits[-1]
+                asciidoc += ' operations'
+                asciidoc += '\n'
+
+        if 'vkCmd' in blockname:
+            # The commandBuffer parameter must be being recorded
+            asciidoc += '* '
+            asciidoc += 'pname:commandBuffer must: be in the recording state'
+            asciidoc += '\n'
+
+            # The queue type must be valid
+            queuetypes = cmd.attrib.get('queues')
+            queuebits = []
+            for queuetype in re.findall(r'([^,]+)', queuetypes):
+                queuebits.append(queuetype.replace('_',' '))
+
+            asciidoc += '* '
+            asciidoc += 'The sname:VkCommandPool that pname:commandBuffer was allocated from must: support '
+            if len(queuebits) == 1:
+                asciidoc += queuebits[0]
+            else:
+                asciidoc += (', ').join(queuebits[:-1])
+                asciidoc += ' or '
+                asciidoc += queuebits[-1]
+            asciidoc += ' operations'
+            asciidoc += '\n'
+
+            # Must be called inside/outside a renderpass appropriately
+            renderpass = cmd.attrib.get('renderpass')
+
+            if renderpass != 'both':
+                asciidoc += '* This command must: only be called '
+                asciidoc += renderpass
+                asciidoc += ' of a render pass instance'
+                asciidoc += '\n'
+
+            # Must be in the right level command buffer
+            cmdbufferlevel = cmd.attrib.get('cmdbufferlevel')
+
+            if cmdbufferlevel != 'primary,secondary':
+                asciidoc += '* pname:commandBuffer must: be a '
+                asciidoc += cmdbufferlevel
+                asciidoc += ' sname:VkCommandBuffer'
+                asciidoc += '\n'
+
+        # Any non-optional arraylengths should specify they must be greater than 0
+        for param in params:
+            paramname = param.find('name')
+
+            for arraylength in arraylengths:
+                if paramname.text == arraylength and param.attrib.get('optional') is None:
+                    # Get all the array dependencies
+                    arrays = cmd.findall("param/[@len='" + arraylength + "'][@optional='true']")
+
+                    # Get all the optional array dependencies, including those not generating validity for some reason
+                    optionalarrays = cmd.findall("param/[@len='" + arraylength + "'][@optional='true']")
+                    optionalarrays.extend(cmd.findall("param/[@len='" + arraylength + "'][@noautovalidity='true']"))
+
+                    asciidoc += '* '
+
+                    # Allow lengths to be arbitrary if all their dependents are optional
+                    if len(optionalarrays) == len(arrays) and len(optionalarrays) != 0:
+                        asciidoc += 'If '
+                        if len(optionalarrays) > 1:
+                            asciidoc += 'any of '
+
+                        for array in optionalarrays[:-1]:
+                            asciidoc += self.makeParameterName(optionalarrays.find('name').text)
+                            asciidoc += ', '
+
+                        if len(optionalarrays) > 1:
+                            asciidoc += 'and '
+                            asciidoc += self.makeParameterName(optionalarrays[-1].find('name').text)
+                            asciidoc += ' are '
+                        else:
+                            asciidoc += self.makeParameterName(optionalarrays[-1].find('name').text)
+                            asciidoc += ' is '
+
+                        asciidoc += 'not `NULL`, '
+
+                        if self.paramIsPointer(param):
+                            asciidoc += 'the value referenced by '
+                        else:
+                            asciidoc += 'the value of '
+
+                    elif self.paramIsPointer(param):
+                        asciidoc += 'The value referenced by '
+                    else:
+                        asciidoc += 'The value of '
+
+                    asciidoc += self.makeParameterName(arraylength)
+                    asciidoc += ' must: be greater than `0`'
+                    asciidoc += '\n'
+
+        # Find the parents of all objects referenced in this command
+        for param in handles:
+            asciidoc += self.makeAsciiDocHandleParent(param, params)
+
+        # Find the common ancestors of objects
+        noancestorscount = 0
+        while noancestorscount < len(parentdictionary):
+            noancestorscount = 0
+            oldparentdictionary = parentdictionary.copy()
+            for parent in oldparentdictionary.items():
+                ancestor = self.getHandleParent(parent[0])
+
+                while ancestor is not None and ancestor not in parentdictionary:
+                    ancestor = self.getHandleParent(ancestor)
+
+                if ancestor is not None:
+                    parentdictionary[ancestor] += parentdictionary.pop(parent[0])
+                else:
+                    # No ancestors possible - so count it up
+                    noancestorscount += 1
+
+        # Add validation language about common ancestors
+        for parent in parentdictionary.items():
+            if len(parent[1]) > 1:
+                parentlanguage = '* '
+
+                parentlanguage += 'Each of '
+                parentlanguage += ", ".join(parent[1][:-1])
+                parentlanguage += ' and '
+                parentlanguage += parent[1][-1]
+                if anyparentedhandlesoptional is True:
+                    parentlanguage += ' that are valid handles'
+                parentlanguage += ' must: have been created, allocated or retrieved from the same '
+                parentlanguage += self.makeStructName(parent[0])
+                parentlanguage += '\n'
+
+                # Capitalize and add to the main language
+                asciidoc += parentlanguage
+
+        # Add in any plain-text validation language that's in the xml
+        for usage in usages:
+            asciidoc += '* '
+            asciidoc += usage.text
+            asciidoc += '\n'
+
+        # In case there's nothing to report, return None
+        if asciidoc == '':
+            return None
+        # Delimit the asciidoc block
+        return asciidoc
+
+    def makeThreadSafetyBlock(self, cmd, paramtext):
+        """Generate C function pointer typedef for <command> Element"""
+        paramdecl = ''
+
+        # For any vkCmd* functions, the commandBuffer parameter must be being recorded
+        if cmd.find('proto/name') is not None and 'vkCmd' in cmd.find('proto/name'):
+            paramdecl += '* '
+            paramdecl += 'The sname:VkCommandPool that pname:commandBuffer was created from'
+            paramdecl += '\n'
+
+        # Find and add any parameters that are thread unsafe
+        explicitexternsyncparams = cmd.findall(paramtext + "[@externsync]")
+        if (explicitexternsyncparams is not None):
+            for param in explicitexternsyncparams:
+                externsyncattribs = param.attrib.get('externsync')
+                paramname = param.find('name')
+                for externsyncattrib in externsyncattribs.split(','):
+                    paramdecl += '* '
+                    paramdecl += 'Host access to '
+                    if externsyncattrib == 'true':
+                        if self.paramIsArray(param):
+                            paramdecl += 'each member of ' + self.makeParameterName(paramname.text)
+                        elif self.paramIsPointer(param):
+                            paramdecl += 'the object referenced by ' + self.makeParameterName(paramname.text)
+                        else:
+                            paramdecl += self.makeParameterName(paramname.text)
+                    else:
+                        paramdecl += 'pname:'
+                        paramdecl += externsyncattrib
+                    paramdecl += ' must: be externally synchronized\n'
+
+        # Find and add any "implicit" parameters that are thread unsafe
+        implicitexternsyncparams = cmd.find('implicitexternsyncparams')
+        if (implicitexternsyncparams is not None):
+            for elem in implicitexternsyncparams:
+                paramdecl += '* '
+                paramdecl += 'Host access to '
+                paramdecl += elem.text
+                paramdecl += ' must: be externally synchronized\n'
+
+        if (paramdecl == ''):
+            return None
+        else:
+            return paramdecl
+
+    def makeCommandPropertiesTableEntry(self, cmd, name):
+    
+        if 'vkCmd' in name:
+            # Must be called inside/outside a renderpass appropriately
+            cmdbufferlevel = cmd.attrib.get('cmdbufferlevel')
+            cmdbufferlevel = (' + \n').join(cmdbufferlevel.title().split(','))
+            
+            renderpass = cmd.attrib.get('renderpass')
+            renderpass = renderpass.capitalize()
+            
+            queues = cmd.attrib.get('queues')
+            queues = (' + \n').join(queues.upper().split(','))
+            
+            return '|' + cmdbufferlevel + '|' + renderpass + '|' + queues    
+        elif 'vkQueue' in name:
+            # Must be called inside/outside a renderpass appropriately
+            
+            queues = cmd.attrib.get('queues')
+            if queues is None:
+                queues = 'Any'
+            else:
+                queues = (' + \n').join(queues.upper().split(','))
+            
+            return '|-|-|' + queues   
+
+        return None
+        
+    def makeSuccessCodes(self, cmd, name):
+
+        successcodes = cmd.attrib.get('successcodes')
+        if successcodes is not None:
+        
+            successcodeentry = ''
+            successcodes = successcodes.split(',')
+            return '* ' + '\n* '.join(successcodes)
+
+        return None
+
+    def makeErrorCodes(self, cmd, name):
+
+        errorcodes = cmd.attrib.get('errorcodes')
+        if errorcodes is not None:
+        
+            errorcodeentry = ''
+            errorcodes = errorcodes.split(',')
+            return '* ' + '\n* '.join(errorcodes)
+
+        return None
+
+    #
+    # Command generation
+    def genCmd(self, cmdinfo, name):
+        OutputGenerator.genCmd(self, cmdinfo, name)
+        #
+        # Get all thh parameters
+        params = cmdinfo.elem.findall('param')
+        usages = cmdinfo.elem.findall('validity/usage')
+
+        validity = self.makeValidUsageStatements(cmdinfo.elem, name, params, usages)
+        threadsafety = self.makeThreadSafetyBlock(cmdinfo.elem, 'param')
+        commandpropertiesentry = self.makeCommandPropertiesTableEntry(cmdinfo.elem, name)
+        successcodes = self.makeSuccessCodes(cmdinfo.elem, name)
+        errorcodes = self.makeErrorCodes(cmdinfo.elem, name)
+
+        self.writeInclude('validity/protos', name, validity, threadsafety, commandpropertiesentry, successcodes, errorcodes)
+
+    #
+    # Struct Generation
+    def genStruct(self, typeinfo, typename):
+        OutputGenerator.genStruct(self, typeinfo, typename)
+
+        # Anything that's only ever returned can't be set by the user, so shouldn't have any validity information.
+        if typeinfo.elem.attrib.get('returnedonly') is None:
+            params = typeinfo.elem.findall('member')
+            usages = typeinfo.elem.findall('validity/usage')
+
+            validity = self.makeValidUsageStatements(typeinfo.elem, typename, params, usages)
+            threadsafety = self.makeThreadSafetyBlock(typeinfo.elem, 'member')
+
+            self.writeInclude('validity/structs', typename, validity, threadsafety, None, None, None)
+        else:
+            # Still generate files for return only structs, in case this state changes later
+            self.writeInclude('validity/structs', typename, None, None, None, None, None)
+
+    #
+    # Type Generation
+    def genType(self, typeinfo, typename):
+        OutputGenerator.genType(self, typeinfo, typename)
+
+        category = typeinfo.elem.get('category')
+        if (category == 'struct' or category == 'union'):
+            self.genStruct(typeinfo, typename)
+
+# HostSynchronizationOutputGenerator - subclass of OutputGenerator.
+# Generates AsciiDoc includes of the externsync parameter table for the
+# fundamentals chapter of the Vulkan specification. Similar to
+# DocOutputGenerator.
+#
+# ---- methods ----
+# HostSynchronizationOutputGenerator(errFile, warnFile, diagFile) - args as for
+#   OutputGenerator. Defines additional internal state.
+# ---- methods overriding base class ----
+# genCmd(cmdinfo)
+class HostSynchronizationOutputGenerator(OutputGenerator):
+    # Generate Host Synchronized Parameters in a table at the top of the spec
+    def __init__(self,
+                 errFile = sys.stderr,
+                 warnFile = sys.stderr,
+                 diagFile = sys.stdout):
+        OutputGenerator.__init__(self, errFile, warnFile, diagFile)
+
+    threadsafety = {'parameters': '', 'parameterlists': '', 'implicit': ''}
+
+    def makeParameterName(self, name):
+        return 'pname:' + name
+
+    def makeFLink(self, name):
+        return 'flink:' + name
+
+    #
+    # Generate an include file
+    #
+    # directory - subdirectory to put file in
+    # basename - base name of the file
+    # contents - contents of the file (Asciidoc boilerplate aside)
+    def writeInclude(self):
+
+        if self.threadsafety['parameters'] is not None:
+            # Create file
+            filename = self.genOpts.genDirectory + '/' + self.genOpts.filename + '/parameters.txt'
+            self.logMsg('diag', '# Generating include file:', filename)
+            fp = open(filename, 'w')
+
+            # Host Synchronization
+            write('.Externally Synchronized Parameters', file=fp)
+            write('*' * 80, file=fp)
+            write(self.threadsafety['parameters'], file=fp, end='')
+            write('*' * 80, file=fp)
+            write('', file=fp)
+
+        if self.threadsafety['parameterlists'] is not None:
+            # Create file
+            filename = self.genOpts.genDirectory + '/' + self.genOpts.filename + '/parameterlists.txt'
+            self.logMsg('diag', '# Generating include file:', filename)
+            fp = open(filename, 'w')
+
+            # Host Synchronization
+            write('.Externally Synchronized Parameter Lists', file=fp)
+            write('*' * 80, file=fp)
+            write(self.threadsafety['parameterlists'], file=fp, end='')
+            write('*' * 80, file=fp)
+            write('', file=fp)
+
+        if self.threadsafety['implicit'] is not None:
+            # Create file
+            filename = self.genOpts.genDirectory + '/' + self.genOpts.filename + '/implicit.txt'
+            self.logMsg('diag', '# Generating include file:', filename)
+            fp = open(filename, 'w')
+
+            # Host Synchronization
+            write('.Implicit Externally Synchronized Parameters', file=fp)
+            write('*' * 80, file=fp)
+            write(self.threadsafety['implicit'], file=fp, end='')
+            write('*' * 80, file=fp)
+            write('', file=fp)
+
+        fp.close()
+
+    #
+    # Check if the parameter passed in is a pointer to an array
+    def paramIsArray(self, param):
+        return param.attrib.get('len') is not None
+
+    # Check if the parameter passed in is a pointer
+    def paramIsPointer(self, param):
+        ispointer = False
+        paramtype = param.find('type')
+        if paramtype.tail is not None and '*' in paramtype.tail:
+            ispointer = True
+
+        return ispointer
+
+    # Turn the "name[].member[]" notation into plain English.
+    def makeThreadDereferenceHumanReadable(self, dereference):
+        matches = re.findall(r"[\w]+[^\w]*",dereference)
+        stringval = ''
+        for match in reversed(matches):
+            if '->' in match or '.' in match:
+                stringval += 'member of '
+            if '[]' in match:
+                stringval += 'each element of '
+
+            stringval += 'the '
+            stringval += self.makeParameterName(re.findall(r"[\w]+",match)[0])
+            stringval += ' '
+
+        stringval += 'parameter'
+
+        return stringval[0].upper() + stringval[1:]
+
+    def makeThreadSafetyBlocks(self, cmd, paramtext):
+        protoname = cmd.find('proto/name').text
+
+        # Find and add any parameters that are thread unsafe
+        explicitexternsyncparams = cmd.findall(paramtext + "[@externsync]")
+        if (explicitexternsyncparams is not None):
+            for param in explicitexternsyncparams:
+                externsyncattribs = param.attrib.get('externsync')
+                paramname = param.find('name')
+                for externsyncattrib in externsyncattribs.split(','):
+
+                    tempstring = '* '
+                    if externsyncattrib == 'true':
+                        if self.paramIsArray(param):
+                            tempstring += 'Each element of the '
+                        elif self.paramIsPointer(param):
+                            tempstring += 'The object referenced by the '
+                        else:
+                            tempstring += 'The '
+
+                        tempstring += self.makeParameterName(paramname.text)
+                        tempstring += ' parameter'
+
+                    else:
+                        tempstring += self.makeThreadDereferenceHumanReadable(externsyncattrib)
+
+                    tempstring += ' in '
+                    tempstring += self.makeFLink(protoname)
+                    tempstring += '\n'
+
+
+                    if ' element of ' in tempstring:
+                        self.threadsafety['parameterlists'] += tempstring
+                    else:
+                        self.threadsafety['parameters'] += tempstring
+
+
+        # Find and add any "implicit" parameters that are thread unsafe
+        implicitexternsyncparams = cmd.find('implicitexternsyncparams')
+        if (implicitexternsyncparams is not None):
+            for elem in implicitexternsyncparams:
+                self.threadsafety['implicit'] += '* '
+                self.threadsafety['implicit'] += elem.text[0].upper()
+                self.threadsafety['implicit'] += elem.text[1:]
+                self.threadsafety['implicit'] += ' in '
+                self.threadsafety['implicit'] += self.makeFLink(protoname)
+                self.threadsafety['implicit'] += '\n'
+
+
+        # For any vkCmd* functions, the commandBuffer parameter must be being recorded
+        if protoname is not None and 'vkCmd' in protoname:
+            self.threadsafety['implicit'] += '* '
+            self.threadsafety['implicit'] += 'The sname:VkCommandPool that pname:commandBuffer was allocated from, in '
+            self.threadsafety['implicit'] += self.makeFLink(protoname)
+
+            self.threadsafety['implicit'] += '\n'
+
+    #
+    # Command generation
+    def genCmd(self, cmdinfo, name):
+        OutputGenerator.genCmd(self, cmdinfo, name)
+        #
+        # Get all thh parameters
+        params = cmdinfo.elem.findall('param')
+        usages = cmdinfo.elem.findall('validity/usage')
+
+        self.makeThreadSafetyBlocks(cmdinfo.elem, 'param')
+
+        self.writeInclude()
diff --git a/genvk.py b/genvk.py
new file mode 100755
index 0000000..5421d41
--- /dev/null
+++ b/genvk.py
@@ -0,0 +1,293 @@
+#!/usr/bin/env python
+#
+# Copyright (c) 2013-2015 The Khronos Group Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and/or associated documentation files (the
+# "Materials"), to deal in the Materials without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Materials, and to
+# permit persons to whom the Materials are furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Materials.
+#
+# THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+
+import sys, time, pdb, string, cProfile
+from reg import *
+from generator import write, CGeneratorOptions, COutputGenerator, DocGeneratorOptions, DocOutputGenerator, PyOutputGenerator, ValidityOutputGenerator, HostSynchronizationOutputGenerator
+
+# debug - start header generation in debugger
+# dump - dump registry after loading
+# profile - enable Python profiling
+# protect - whether to use #ifndef protections
+# registry <filename> - use specified XML registry instead of gl.xml
+# target - string name of target header, or all targets if None
+# timeit - time length of registry loading & header generation
+# validate - validate return & parameter group tags against <group>
+debug   = False
+dump    = False
+profile = False
+protect = True
+target  = None
+timeit  = False
+validate= False
+# Default input / log files
+errFilename = None
+diagFilename = 'diag.txt'
+regFilename = 'vk.xml'
+
+if __name__ == '__main__':
+    i = 1
+    while (i < len(sys.argv)):
+        arg = sys.argv[i]
+        i = i + 1
+        if (arg == '-debug'):
+            write('Enabling debug (-debug)', file=sys.stderr)
+            debug = True
+        elif (arg == '-dump'):
+            write('Enabling dump (-dump)', file=sys.stderr)
+            dump = True
+        elif (arg == '-noprotect'):
+            write('Disabling inclusion protection in output headers', file=sys.stderr)
+            protect = False
+        elif (arg == '-profile'):
+            write('Enabling profiling (-profile)', file=sys.stderr)
+            profile = True
+        elif (arg == '-registry'):
+            regFilename = sys.argv[i]
+            i = i+1
+            write('Using registry ', regFilename, file=sys.stderr)
+        elif (arg == '-time'):
+            write('Enabling timing (-time)', file=sys.stderr)
+            timeit = True
+        elif (arg == '-validate'):
+            write('Enabling group validation (-validate)', file=sys.stderr)
+            validate = True
+        elif (arg[0:1] == '-'):
+            write('Unrecognized argument:', arg, file=sys.stderr)
+            exit(1)
+        else:
+            target = arg
+            write('Using target', target, file=sys.stderr)
+
+# Simple timer functions
+startTime = None
+def startTimer():
+    global startTime
+    startTime = time.clock()
+def endTimer(msg):
+    global startTime
+    endTime = time.clock()
+    if (timeit):
+        write(msg, endTime - startTime)
+        startTime = None
+
+# Load & parse registry
+reg = Registry()
+
+startTimer()
+tree = etree.parse(regFilename)
+endTimer('Time to make ElementTree =')
+
+startTimer()
+reg.loadElementTree(tree)
+endTimer('Time to parse ElementTree =')
+
+if (validate):
+    reg.validateGroups()
+
+if (dump):
+    write('***************************************')
+    write('Performing Registry dump to regdump.txt')
+    write('***************************************')
+    reg.dumpReg(filehandle = open('regdump.txt','w'))
+
+# Turn a list of strings into a regexp string matching exactly those strings
+def makeREstring(list):
+    return '^(' + '|'.join(list) + ')$'
+
+# Descriptive names for various regexp patterns used to select
+# versions and extensions
+allVersions     = allExtensions = '.*'
+noVersions      = noExtensions = None
+
+# Copyright text prefixing all headers (list of strings).
+prefixStrings = [
+    '/*',
+    '** Copyright (c) 2015 The Khronos Group Inc.',
+    '**',
+    '** Permission is hereby granted, free of charge, to any person obtaining a',
+    '** copy of this software and/or associated documentation files (the',
+    '** "Materials"), to deal in the Materials without restriction, including',
+    '** without limitation the rights to use, copy, modify, merge, publish,',
+    '** distribute, sublicense, and/or sell copies of the Materials, and to',
+    '** permit persons to whom the Materials are furnished to do so, subject to',
+    '** the following conditions:',
+    '**',
+    '** The above copyright notice and this permission notice shall be included',
+    '** in all copies or substantial portions of the Materials.',
+    '**',
+    '** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,',
+    '** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF',
+    '** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.',
+    '** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY',
+    '** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,',
+    '** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE',
+    '** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.',
+    '*/',
+    ''
+]
+
+# Text specific to Vulkan headers
+vkPrefixStrings = [
+    '/*',
+    '** This header is generated from the Khronos Vulkan XML API Registry.',
+    '**',
+    '*/',
+    ''
+]
+
+# Defaults for generating re-inclusion protection wrappers (or not)
+protectFile = protect
+protectFeature = protect
+protectProto = protect
+
+buildList = [
+    # Vulkan 1.0 - core API + extensions. To generate just the core API,
+    # change to 'defaultExtensions = None' below.
+    [ COutputGenerator,
+      CGeneratorOptions(
+        filename          = '../vulkan/vulkan.h',
+        apiname           = 'vulkan',
+        profile           = None,
+        versions          = allVersions,
+        emitversions      = allVersions,
+        defaultExtensions = 'vulkan',
+        addExtensions     = None,
+        removeExtensions  = None,
+        prefixText        = prefixStrings + vkPrefixStrings,
+        genFuncPointers   = True,
+        protectFile       = protectFile,
+        protectFeature    = False,
+        protectProto      = '#ifndef',
+        protectProtoStr   = 'VK_NO_PROTOTYPES',
+        apicall           = 'VKAPI_ATTR ',
+        apientry          = 'VKAPI_CALL ',
+        apientryp         = 'VKAPI_PTR *',
+        alignFuncParam    = 48)
+    ],
+    # Vulkan 1.0 draft - core API include files for spec
+    # Overwrites include subdirectories in spec source tree
+    # The generated include files do not include the calling convention
+    # macros (apientry etc.), unlike the header files.
+    [ DocOutputGenerator,
+      DocGeneratorOptions(
+        filename          = 'vulkan-docs',
+        apiname           = 'vulkan',
+        profile           = None,
+        versions          = allVersions,
+        emitversions      = allVersions,
+        defaultExtensions = 'vulkan',
+        addExtensions     = None,
+        removeExtensions  = None,
+        prefixText        = prefixStrings + vkPrefixStrings,
+        apicall           = '',
+        apientry          = '',
+        apientryp         = '*',
+        genDirectory      = '../../doc/specs/vulkan',
+        alignFuncParam    = 48,
+        expandEnumerants  = False)
+    ],
+    # Vulkan 1.0 draft - API names to validate man/api spec includes & links
+    #    filename          = 'vkapi.py',
+    [ PyOutputGenerator,
+      DocGeneratorOptions(
+        filename          = '../../doc/specs/vulkan/vkapi.py',
+        apiname           = 'vulkan',
+        profile           = None,
+        versions          = allVersions,
+        emitversions      = allVersions,
+        defaultExtensions = None,
+        addExtensions     = None,
+        removeExtensions  = None)
+    ],
+    # Vulkan 1.0 draft - core API include files for spec
+    # Overwrites include subdirectories in spec source tree
+    [ ValidityOutputGenerator,
+      DocGeneratorOptions(
+        filename          = 'validity',
+        apiname           = 'vulkan',
+        profile           = None,
+        versions          = allVersions,
+        emitversions      = allVersions,
+        defaultExtensions = None,
+        addExtensions     = None,
+        removeExtensions  = None,
+        genDirectory      = '../../doc/specs/vulkan')
+    ],
+    # Vulkan 1.0 draft - core API include files for spec
+    # Overwrites include subdirectories in spec source tree
+    [ HostSynchronizationOutputGenerator,
+      DocGeneratorOptions(
+        filename          = 'hostsynctable',
+        apiname           = 'vulkan',
+        profile           = None,
+        versions          = allVersions,
+        emitversions      = allVersions,
+        defaultExtensions = None,
+        addExtensions     = None,
+        removeExtensions  = None,
+        genDirectory      = '../../doc/specs/vulkan')
+    ],
+    None
+]
+
+# create error/warning & diagnostic files
+if (errFilename):
+    errWarn = open(errFilename,'w')
+else:
+    errWarn = sys.stderr
+diag = open(diagFilename, 'w')
+
+def genHeaders():
+    # Loop over targets, building each
+    generated = 0
+    for item in buildList:
+        if (item == None):
+            break
+        createGenerator = item[0]
+        genOpts = item[1]
+        if (target and target != genOpts.filename):
+            # write('*** Skipping', genOpts.filename)
+            continue
+        write('*** Building', genOpts.filename)
+        generated = generated + 1
+        startTimer()
+        gen = createGenerator(errFile=errWarn,
+                              warnFile=errWarn,
+                              diagFile=diag)
+        reg.setGenerator(gen)
+        reg.apiGen(genOpts)
+        write('** Generated', genOpts.filename)
+        endTimer('Time to generate ' + genOpts.filename + ' =')
+    if (target and generated == 0):
+        write('Failed to generate target:', target)
+
+if (debug):
+    pdb.run('genHeaders()')
+elif (profile):
+    import cProfile, pstats
+    cProfile.run('genHeaders()', 'profile.txt')
+    p = pstats.Stats('profile.txt')
+    p.strip_dirs().sort_stats('time').print_stats(50)
+else:
+    genHeaders()
diff --git a/reg.py b/reg.py
new file mode 100755
index 0000000..8be9adf
--- /dev/null
+++ b/reg.py
@@ -0,0 +1,762 @@
+#!/usr/bin/python3 -i
+#
+# Copyright (c) 2013-2015 The Khronos Group Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and/or associated documentation files (the
+# "Materials"), to deal in the Materials without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Materials, and to
+# permit persons to whom the Materials are furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Materials.
+#
+# THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+
+import io,os,re,string,sys
+from lxml import etree
+
+# matchAPIProfile - returns whether an API and profile
+#   being generated matches an element's profile
+# api - string naming the API to match
+# profile - string naming the profile to match
+# elem - Element which (may) have 'api' and 'profile'
+#   attributes to match to.
+# If a tag is not present in the Element, the corresponding API
+#   or profile always matches.
+# Otherwise, the tag must exactly match the API or profile.
+# Thus, if 'profile' = core:
+#   <remove> with no attribute will match
+#   <remove profile='core'> will match
+#   <remove profile='compatibility'> will not match
+# Possible match conditions:
+#   Requested   Element
+#   Profile     Profile
+#   ---------   --------
+#   None        None        Always matches
+#   'string'    None        Always matches
+#   None        'string'    Does not match. Can't generate multiple APIs
+#                           or profiles, so if an API/profile constraint
+#                           is present, it must be asked for explicitly.
+#   'string'    'string'    Strings must match
+#
+#   ** In the future, we will allow regexes for the attributes,
+#   not just strings, so that api="^(gl|gles2)" will match. Even
+#   this isn't really quite enough, we might prefer something
+#   like "gl(core)|gles1(common-lite)".
+def matchAPIProfile(api, profile, elem):
+    """Match a requested API & profile name to a api & profile attributes of an Element"""
+    match = True
+    # Match 'api', if present
+    if ('api' in elem.attrib):
+        if (api == None):
+            raise UserWarning("No API requested, but 'api' attribute is present with value '" +
+                              elem.get('api') + "'")
+        elif (api != elem.get('api')):
+            # Requested API doesn't match attribute
+            return False
+    if ('profile' in elem.attrib):
+        if (profile == None):
+            raise UserWarning("No profile requested, but 'profile' attribute is present with value '" +
+                elem.get('profile') + "'")
+        elif (profile != elem.get('profile')):
+            # Requested profile doesn't match attribute
+            return False
+    return True
+
+# BaseInfo - base class for information about a registry feature
+# (type/group/enum/command/API/extension).
+#   required - should this feature be defined during header generation
+#     (has it been removed by a profile or version)?
+#   declared - has this feature been defined already?
+#   elem - lxml.etree Element for this feature
+#   resetState() - reset required/declared to initial values. Used
+#     prior to generating a new API interface.
+class BaseInfo:
+    """Represents the state of a registry feature, used during API generation"""
+    def __init__(self, elem):
+        self.required = False
+        self.declared = False
+        self.elem = elem
+    def resetState(self):
+        self.required = False
+        self.declared = False
+
+# TypeInfo - registry information about a type. No additional state
+#   beyond BaseInfo is required.
+class TypeInfo(BaseInfo):
+    """Represents the state of a registry type"""
+    def __init__(self, elem):
+        BaseInfo.__init__(self, elem)
+
+# GroupInfo - registry information about a group of related enums
+# in an <enums> block, generally corresponding to a C "enum" type.
+class GroupInfo(BaseInfo):
+    """Represents the state of a registry <enums> group"""
+    def __init__(self, elem):
+        BaseInfo.__init__(self, elem)
+
+# EnumInfo - registry information about an enum
+#   type - numeric type of the value of the <enum> tag
+#     ( '' for GLint, 'u' for GLuint, 'ull' for GLuint64 )
+class EnumInfo(BaseInfo):
+    """Represents the state of a registry enum"""
+    def __init__(self, elem):
+        BaseInfo.__init__(self, elem)
+        self.type = elem.get('type')
+        if (self.type == None):
+            self.type = ''
+
+# CmdInfo - registry information about a command
+class CmdInfo(BaseInfo):
+    """Represents the state of a registry command"""
+    def __init__(self, elem):
+        BaseInfo.__init__(self, elem)
+
+# FeatureInfo - registry information about an API <feature>
+# or <extension>
+#   name - feature name string (e.g. 'vk_ext_khr_surface')
+#   version - feature version number (e.g. 1.2). <extension>
+#     features are unversioned and assigned version number 0.
+#     ** This is confusingly taken from the 'number' attribute of <feature>.
+#        Needs fixing.
+#   number - extension number, used for ordering and for
+#     assigning enumerant offsets. <feature> features do
+#     not have extension numbers and are assigned number 0.
+#   category - category, e.g. VERSION or khr/vendor tag
+#   emit - has this feature been defined already?
+class FeatureInfo(BaseInfo):
+    """Represents the state of an API feature (version/extension)"""
+    def __init__(self, elem):
+        BaseInfo.__init__(self, elem)
+        self.name = elem.get('name')
+        # Determine element category (vendor). Only works
+        # for <extension> elements.
+        if (elem.tag == 'feature'):
+            self.category = 'VERSION'
+            self.version = elem.get('number')
+            self.number = "0"
+        else:
+            self.category = self.name.split('_', 2)[1]
+            self.version = "0"
+            self.number = elem.get('number')
+        self.emit = False
+
+from generator import write, GeneratorOptions, OutputGenerator
+
+# Registry - object representing an API registry, loaded from an XML file
+# Members
+#   tree - ElementTree containing the root <registry>
+#   typedict - dictionary of TypeInfo objects keyed by type name
+#   groupdict - dictionary of GroupInfo objects keyed by group name
+#   enumdict - dictionary of EnumInfo objects keyed by enum name
+#   cmddict - dictionary of CmdInfo objects keyed by command name
+#   apidict - dictionary of <api> Elements keyed by API name
+#   extensions - list of <extension> Elements
+#   extdict - dictionary of <extension> Elements keyed by extension name
+#   gen - OutputGenerator object used to write headers / messages
+#   genOpts - GeneratorOptions object used to control which
+#     fetures to write and how to format them
+#   emitFeatures - True to actually emit features for a version / extension,
+#     or False to just treat them as emitted
+# Public methods
+#   loadElementTree(etree) - load registry from specified ElementTree
+#   loadFile(filename) - load registry from XML file
+#   setGenerator(gen) - OutputGenerator to use
+#   parseTree() - parse the registry once loaded & create dictionaries
+#   dumpReg(maxlen, filehandle) - diagnostic to dump the dictionaries
+#     to specified file handle (default stdout). Truncates type /
+#     enum / command elements to maxlen characters (default 80)
+#   generator(g) - specify the output generator object
+#   apiGen(apiname, genOpts) - generate API headers for the API type
+#     and profile specified in genOpts, but only for the versions and
+#     extensions specified there.
+#   apiReset() - call between calls to apiGen() to reset internal state
+# Private methods
+#   addElementInfo(elem,info,infoName,dictionary) - add feature info to dict
+#   lookupElementInfo(fname,dictionary) - lookup feature info in dict
+class Registry:
+    """Represents an API registry loaded from XML"""
+    def __init__(self):
+        self.tree         = None
+        self.typedict     = {}
+        self.groupdict    = {}
+        self.enumdict     = {}
+        self.cmddict      = {}
+        self.apidict      = {}
+        self.extensions   = []
+        self.extdict      = {}
+        # A default output generator, so commands prior to apiGen can report
+        # errors via the generator object.
+        self.gen          = OutputGenerator()
+        self.genOpts      = None
+        self.emitFeatures = False
+    def loadElementTree(self, tree):
+        """Load ElementTree into a Registry object and parse it"""
+        self.tree = tree
+        self.parseTree()
+    def loadFile(self, file):
+        """Load an API registry XML file into a Registry object and parse it"""
+        self.tree = etree.parse(file)
+        self.parseTree()
+    def setGenerator(self, gen):
+        """Specify output generator object. None restores the default generator"""
+        self.gen = gen
+        self.gen.setRegistry(self.tree)
+
+    # addElementInfo - add information about an element to the
+    # corresponding dictionary
+    #   elem - <type>/<enums>/<enum>/<command>/<feature>/<extension> Element
+    #   info - corresponding {Type|Group|Enum|Cmd|Feature}Info object
+    #   infoName - 'type' / 'group' / 'enum' / 'command' / 'feature' / 'extension'
+    #   dictionary - self.{type|group|enum|cmd|api|ext}dict
+    # If the Element has an 'api' attribute, the dictionary key is the
+    # tuple (name,api). If not, the key is the name. 'name' is an
+    # attribute of the Element
+    def addElementInfo(self, elem, info, infoName, dictionary):
+        if ('api' in elem.attrib):
+            key = (elem.get('name'),elem.get('api'))
+        else:
+            key = elem.get('name')
+        if key in dictionary:
+            self.gen.logMsg('warn', '*** Attempt to redefine',
+                            infoName, 'with key:', key)
+        else:
+            dictionary[key] = info
+    #
+    # lookupElementInfo - find a {Type|Enum|Cmd}Info object by name.
+    # If an object qualified by API name exists, use that.
+    #   fname - name of type / enum / command
+    #   dictionary - self.{type|enum|cmd}dict
+    def lookupElementInfo(self, fname, dictionary):
+        key = (fname, self.genOpts.apiname)
+        if (key in dictionary):
+            # self.gen.logMsg('diag', 'Found API-specific element for feature', fname)
+            return dictionary[key]
+        elif (fname in dictionary):
+            # self.gen.logMsg('diag', 'Found generic element for feature', fname)
+            return dictionary[fname]
+        else:
+            return None
+    def parseTree(self):
+        """Parse the registry Element, once created"""
+        # This must be the Element for the root <registry>
+        self.reg = self.tree.getroot()
+        #
+        # Create dictionary of registry types from toplevel <types> tags
+        # and add 'name' attribute to each <type> tag (where missing)
+        # based on its <name> element.
+        #
+        # There's usually one <types> block; more are OK
+        # Required <type> attributes: 'name' or nested <name> tag contents
+        self.typedict = {}
+        for type in self.reg.findall('types/type'):
+            # If the <type> doesn't already have a 'name' attribute, set
+            # it from contents of its <name> tag.
+            if (type.get('name') == None):
+                type.attrib['name'] = type.find('name').text
+            self.addElementInfo(type, TypeInfo(type), 'type', self.typedict)
+        #
+        # Create dictionary of registry enum groups from <enums> tags.
+        #
+        # Required <enums> attributes: 'name'. If no name is given, one is
+        # generated, but that group can't be identified and turned into an
+        # enum type definition - it's just a container for <enum> tags.
+        self.groupdict = {}
+        for group in self.reg.findall('enums'):
+            self.addElementInfo(group, GroupInfo(group), 'group', self.groupdict)
+        #
+        # Create dictionary of registry enums from <enum> tags
+        #
+        # <enums> tags usually define different namespaces for the values
+        #   defined in those tags, but the actual names all share the
+        #   same dictionary.
+        # Required <enum> attributes: 'name', 'value'
+        # For containing <enums> which have type="enum" or type="bitmask",
+        # tag all contained <enum>s are required. This is a stopgap until
+        # a better scheme for tagging core and extension enums is created.
+        self.enumdict = {}
+        for enums in self.reg.findall('enums'):
+            required = (enums.get('type') != None)
+            for enum in enums.findall('enum'):
+                enumInfo = EnumInfo(enum)
+                enumInfo.required = required
+                self.addElementInfo(enum, enumInfo, 'enum', self.enumdict)
+        #
+        # Create dictionary of registry commands from <command> tags
+        # and add 'name' attribute to each <command> tag (where missing)
+        # based on its <proto><name> element.
+        #
+        # There's usually only one <commands> block; more are OK.
+        # Required <command> attributes: 'name' or <proto><name> tag contents
+        self.cmddict = {}
+        for cmd in self.reg.findall('commands/command'):
+            # If the <command> doesn't already have a 'name' attribute, set
+            # it from contents of its <proto><name> tag.
+            if (cmd.get('name') == None):
+                cmd.attrib['name'] = cmd.find('proto/name').text
+            ci = CmdInfo(cmd)
+            self.addElementInfo(cmd, ci, 'command', self.cmddict)
+        #
+        # Create dictionaries of API and extension interfaces
+        #   from toplevel <api> and <extension> tags.
+        #
+        self.apidict = {}
+        for feature in self.reg.findall('feature'):
+            featureInfo = FeatureInfo(feature)
+            self.addElementInfo(feature, featureInfo, 'feature', self.apidict)
+        self.extensions = self.reg.findall('extensions/extension')
+        self.extdict = {}
+        for feature in self.extensions:
+            featureInfo = FeatureInfo(feature)
+            self.addElementInfo(feature, featureInfo, 'extension', self.extdict)
+
+            # Add additional enums defined only in <extension> tags
+            # to the corresponding core type.
+            # When seen here, a copy, processed to contain the numeric enum
+            # value, is added to the corresponding <enums> element, as well
+            # as adding to the enum dictionary. Also add a 'extnumber'
+            # attribute containing the extension number.
+            #
+            # For <enum> tags which are actually just constants, if there's
+            # no 'extends' tag but there is a 'value' or 'bitpos' tag, just
+            # add an EnumInfo record to the dictionary. That works because
+            # output generation of constants is purely dependency-based, and
+            # doesn't need to iterate through the XML tags.
+            #
+            # Something like this will need to be done for 'feature's up
+            # above, if we use the same mechanism for adding to the core
+            # API in 1.1.
+            for enum in feature.findall('require/enum'):
+                addEnumInfo = False
+                groupName = enum.get('extends')
+                if (groupName != None):
+                    # self.gen.logMsg('diag', '*** Found extension enum',
+                    #     enum.get('name'))
+                    # Add extension number attribute to the <enum> element
+                    enum.attrib['extnumber'] = featureInfo.number
+                    # Look up the GroupInfo with matching groupName
+                    if (groupName in self.groupdict.keys()):
+                        # self.gen.logMsg('diag', '*** Matching group',
+                        #     groupName, 'found, adding element...')
+                        gi = self.groupdict[groupName]
+                        gi.elem.append(enum)
+                    else:
+                        self.gen.logMsg('warn', '*** NO matching group',
+                            groupName, 'for enum', enum.get('name'), 'found.')
+                    addEnumInfo = True
+                elif (enum.get('value') or enum.get('bitpos')):
+                    # self.gen.logMsg('diag', '*** Adding extension constant "enum"',
+                    #     enum.get('name'))
+                    addEnumInfo = True
+                if (addEnumInfo):
+                    enumInfo = EnumInfo(enum)
+                    self.addElementInfo(enum, enumInfo, 'enum', self.enumdict)
+    def dumpReg(self, maxlen = 40, filehandle = sys.stdout):
+        """Dump all the dictionaries constructed from the Registry object"""
+        write('***************************************', file=filehandle)
+        write('    ** Dumping Registry contents **',     file=filehandle)
+        write('***************************************', file=filehandle)
+        write('// Types', file=filehandle)
+        for name in self.typedict:
+            tobj = self.typedict[name]
+            write('    Type', name, '->', etree.tostring(tobj.elem)[0:maxlen], file=filehandle)
+        write('// Groups', file=filehandle)
+        for name in self.groupdict:
+            gobj = self.groupdict[name]
+            write('    Group', name, '->', etree.tostring(gobj.elem)[0:maxlen], file=filehandle)
+        write('// Enums', file=filehandle)
+        for name in self.enumdict:
+            eobj = self.enumdict[name]
+            write('    Enum', name, '->', etree.tostring(eobj.elem)[0:maxlen], file=filehandle)
+        write('// Commands', file=filehandle)
+        for name in self.cmddict:
+            cobj = self.cmddict[name]
+            write('    Command', name, '->', etree.tostring(cobj.elem)[0:maxlen], file=filehandle)
+        write('// APIs', file=filehandle)
+        for key in self.apidict:
+            write('    API Version ', key, '->',
+                etree.tostring(self.apidict[key].elem)[0:maxlen], file=filehandle)
+        write('// Extensions', file=filehandle)
+        for key in self.extdict:
+            write('    Extension', key, '->',
+                etree.tostring(self.extdict[key].elem)[0:maxlen], file=filehandle)
+        # write('***************************************', file=filehandle)
+        # write('    ** Dumping XML ElementTree **', file=filehandle)
+        # write('***************************************', file=filehandle)
+        # write(etree.tostring(self.tree.getroot(),pretty_print=True), file=filehandle)
+    #
+    # typename - name of type
+    # required - boolean (to tag features as required or not)
+    def markTypeRequired(self, typename, required):
+        """Require (along with its dependencies) or remove (but not its dependencies) a type"""
+        self.gen.logMsg('diag', '*** tagging type:', typename, '-> required =', required)
+        # Get TypeInfo object for <type> tag corresponding to typename
+        type = self.lookupElementInfo(typename, self.typedict)
+        if (type != None):
+            if (required):
+                # Tag type dependencies in 'required' attributes as
+                # required. This DOES NOT un-tag dependencies in a <remove>
+                # tag. See comments in markRequired() below for the reason.
+                if ('requires' in type.elem.attrib):
+                    depType = type.elem.get('requires')
+                    self.gen.logMsg('diag', '*** Generating dependent type',
+                        depType, 'for type', typename)
+                    self.markTypeRequired(depType, required)
+                # Tag types used in defining this type (e.g. in nested
+                # <type> tags)
+                # Look for <type> in entire <command> tree,
+                # not just immediate children
+                for subtype in type.elem.findall('.//type'):
+                    self.gen.logMsg('diag', '*** markRequired: type requires dependent <type>', subtype.text)
+                    self.markTypeRequired(subtype.text, required)
+                # Tag enums used in defining this type, for example in
+                #   <member><name>member</name>[<enum>MEMBER_SIZE</enum>]</member>
+                for subenum in type.elem.findall('.//enum'):
+                    self.gen.logMsg('diag', '*** markRequired: type requires dependent <enum>', subenum.text)
+                    self.markEnumRequired(subenum.text, required)
+            type.required = required
+        else:
+            self.gen.logMsg('warn', '*** type:', typename , 'IS NOT DEFINED')
+    #
+    # enumname - name of enum
+    # required - boolean (to tag features as required or not)
+    def markEnumRequired(self, enumname, required):
+        self.gen.logMsg('diag', '*** tagging enum:', enumname, '-> required =', required)
+        enum = self.lookupElementInfo(enumname, self.enumdict)
+        if (enum != None):
+            enum.required = required
+        else:
+            self.gen.logMsg('warn', '*** enum:', enumname , 'IS NOT DEFINED')
+    #
+    # features - Element for <require> or <remove> tag
+    # required - boolean (to tag features as required or not)
+    def markRequired(self, features, required):
+        """Require or remove features specified in the Element"""
+        self.gen.logMsg('diag', '*** markRequired (features = <too long to print>, required =', required, ')')
+        # Loop over types, enums, and commands in the tag
+        # @@ It would be possible to respect 'api' and 'profile' attributes
+        #  in individual features, but that's not done yet.
+        for typeElem in features.findall('type'):
+            self.markTypeRequired(typeElem.get('name'), required)
+        for enumElem in features.findall('enum'):
+            self.markEnumRequired(enumElem.get('name'), required)
+        for cmdElem in features.findall('command'):
+            name = cmdElem.get('name')
+            self.gen.logMsg('diag', '*** tagging command:', name, '-> required =', required)
+            cmd = self.lookupElementInfo(name, self.cmddict)
+            if (cmd != None):
+                cmd.required = required
+                # Tag all parameter types of this command as required.
+                # This DOES NOT remove types of commands in a <remove>
+                # tag, because many other commands may use the same type.
+                # We could be more clever and reference count types,
+                # instead of using a boolean.
+                if (required):
+                    # Look for <type> in entire <command> tree,
+                    # not just immediate children
+                    for type in cmd.elem.findall('.//type'):
+                        self.gen.logMsg('diag', '*** markRequired: command implicitly requires dependent type', type.text)
+                        self.markTypeRequired(type.text, required)
+            else:
+                self.gen.logMsg('warn', '*** command:', name, 'IS NOT DEFINED')
+    #
+    # interface - Element for <version> or <extension>, containing
+    #   <require> and <remove> tags
+    # api - string specifying API name being generated
+    # profile - string specifying API profile being generated
+    def requireAndRemoveFeatures(self, interface, api, profile):
+        """Process <recquire> and <remove> tags for a <version> or <extension>"""
+        # <require> marks things that are required by this version/profile
+        for feature in interface.findall('require'):
+            if (matchAPIProfile(api, profile, feature)):
+                self.markRequired(feature,True)
+        # <remove> marks things that are removed by this version/profile
+        for feature in interface.findall('remove'):
+            if (matchAPIProfile(api, profile, feature)):
+                self.markRequired(feature,False)
+    #
+    # generateFeature - generate a single type / enum group / enum / command,
+    # and all its dependencies as needed.
+    #   fname - name of feature (<type>/<enum>/<command>)
+    #   ftype - type of feature, 'type' | 'enum' | 'command'
+    #   dictionary - of *Info objects - self.{type|enum|cmd}dict
+    def generateFeature(self, fname, ftype, dictionary):
+        f = self.lookupElementInfo(fname, dictionary)
+        if (f == None):
+            # No such feature. This is an error, but reported earlier
+            self.gen.logMsg('diag', '*** No entry found for feature', fname,
+                            'returning!')
+            return
+        #
+        # If feature isn't required, or has already been declared, return
+        if (not f.required):
+            self.gen.logMsg('diag', '*** Skipping', ftype, fname, '(not required)')
+            return
+        if (f.declared):
+            self.gen.logMsg('diag', '*** Skipping', ftype, fname, '(already declared)')
+            return
+        # Always mark feature declared, as though actually emitted
+        f.declared = True
+        #
+        # Pull in dependent declaration(s) of the feature.
+        # For types, there may be one type in the 'required' attribute of
+        #   the element, as well as many in imbedded <type> and <enum> tags
+        #   within the element.
+        # For commands, there may be many in <type> tags within the element.
+        # For enums, no dependencies are allowed (though perhaps if you
+        #   have a uint64 enum, it should require GLuint64).
+        genProc = None
+        if (ftype == 'type'):
+            genProc = self.gen.genType
+            if ('requires' in f.elem.attrib):
+                depname = f.elem.get('requires')
+                self.gen.logMsg('diag', '*** Generating required dependent type',
+                                depname)
+                self.generateFeature(depname, 'type', self.typedict)
+            for subtype in f.elem.findall('.//type'):
+                self.gen.logMsg('diag', '*** Generating required dependent <type>',
+                    subtype.text)
+                self.generateFeature(subtype.text, 'type', self.typedict)
+            for subtype in f.elem.findall('.//enum'):
+                self.gen.logMsg('diag', '*** Generating required dependent <enum>',
+                    subtype.text)
+                self.generateFeature(subtype.text, 'enum', self.enumdict)
+            # If the type is an enum group, look up the corresponding
+            # group in the group dictionary and generate that instead.
+            if (f.elem.get('category') == 'enum'):
+                self.gen.logMsg('diag', '*** Type', fname, 'is an enum group, so generate that instead')
+                group = self.lookupElementInfo(fname, self.groupdict)
+                if (group == None):
+                    # Unless this is tested for, it's probably fatal to call below
+                    genProc = None
+                    self.logMsg('warn', '*** NO MATCHING ENUM GROUP FOUND!!!')
+                else:
+                    genProc = self.gen.genGroup
+                    f = group
+        elif (ftype == 'command'):
+            genProc = self.gen.genCmd
+            for type in f.elem.findall('.//type'):
+                depname = type.text
+                self.gen.logMsg('diag', '*** Generating required parameter type',
+                                depname)
+                self.generateFeature(depname, 'type', self.typedict)
+        elif (ftype == 'enum'):
+            genProc = self.gen.genEnum
+        # Actually generate the type only if emitting declarations
+        if self.emitFeatures:
+            self.gen.logMsg('diag', '*** Emitting', ftype, 'decl for', fname)
+            genProc(f, fname)
+        else:
+            self.gen.logMsg('diag', '*** Skipping', ftype, fname,
+                            '(not emitting this feature)')
+    #
+    # generateRequiredInterface - generate all interfaces required
+    # by an API version or extension
+    #   interface - Element for <version> or <extension>
+    def generateRequiredInterface(self, interface):
+        """Generate required C interface for specified API version/extension"""
+        #
+        # Loop over all features inside all <require> tags.
+        # <remove> tags are ignored (handled in pass 1).
+        for features in interface.findall('require'):
+            for t in features.findall('type'):
+                self.generateFeature(t.get('name'), 'type', self.typedict)
+            for e in features.findall('enum'):
+                self.generateFeature(e.get('name'), 'enum', self.enumdict)
+            for c in features.findall('command'):
+                self.generateFeature(c.get('name'), 'command', self.cmddict)
+    #
+    # apiGen(genOpts) - generate interface for specified versions
+    #   genOpts - GeneratorOptions object with parameters used
+    #   by the Generator object.
+    def apiGen(self, genOpts):
+        """Generate interfaces for the specified API type and range of versions"""
+        #
+        self.gen.logMsg('diag', '*******************************************')
+        self.gen.logMsg('diag', '  Registry.apiGen file:', genOpts.filename,
+                        'api:', genOpts.apiname,
+                        'profile:', genOpts.profile)
+        self.gen.logMsg('diag', '*******************************************')
+        #
+        self.genOpts = genOpts
+        # Reset required/declared flags for all features
+        self.apiReset()
+        #
+        # Compile regexps used to select versions & extensions
+        regVersions = re.compile(self.genOpts.versions)
+        regEmitVersions = re.compile(self.genOpts.emitversions)
+        regAddExtensions = re.compile(self.genOpts.addExtensions)
+        regRemoveExtensions = re.compile(self.genOpts.removeExtensions)
+        #
+        # Get all matching API versions & add to list of FeatureInfo
+        features = []
+        apiMatch = False
+        for key in self.apidict:
+            fi = self.apidict[key]
+            api = fi.elem.get('api')
+            if (api == self.genOpts.apiname):
+                apiMatch = True
+                if (regVersions.match(fi.version)):
+                    # Matches API & version #s being generated. Mark for
+                    # emission and add to the features[] list .
+                    # @@ Could use 'declared' instead of 'emit'?
+                    fi.emit = (regEmitVersions.match(fi.version) != None)
+                    features.append(fi)
+                    if (not fi.emit):
+                        self.gen.logMsg('diag', '*** NOT tagging feature api =', api,
+                            'name =', fi.name, 'version =', fi.version,
+                            'for emission (does not match emitversions pattern)')
+                else:
+                    self.gen.logMsg('diag', '*** NOT including feature api =', api,
+                        'name =', fi.name, 'version =', fi.version,
+                        '(does not match requested versions)')
+            else:
+                self.gen.logMsg('diag', '*** NOT including feature api =', api,
+                    'name =', fi.name,
+                    '(does not match requested API)')
+        if (not apiMatch):
+            self.gen.logMsg('warn', '*** No matching API versions found!')
+        #
+        # Get all matching extensions, in order by their extension number,
+        # and add to the list of features.
+        # Start with extensions tagged with 'api' pattern matching the API
+        # being generated. Add extensions matching the pattern specified in
+        # regExtensions, then remove extensions matching the pattern
+        # specified in regRemoveExtensions
+        for (extName,ei) in sorted(self.extdict.items(),key = lambda x : x[1].number):
+            extName = ei.name
+            include = False
+            #
+            # Include extension if defaultExtensions is not None and if the
+            # 'supported' attribute matches defaultExtensions. The regexp in
+            # 'supported' must exactly match defaultExtensions, so bracket
+            # it with ^(pat)$.
+            pat = '^(' + ei.elem.get('supported') + ')$'
+            if (self.genOpts.defaultExtensions and
+                     re.match(pat, self.genOpts.defaultExtensions)):
+                self.gen.logMsg('diag', '*** Including extension',
+                    extName, "(defaultExtensions matches the 'supported' attribute)")
+                include = True
+            #
+            # Include additional extensions if the extension name matches
+            # the regexp specified in the generator options. This allows
+            # forcing extensions into an interface even if they're not
+            # tagged appropriately in the registry.
+            if (regAddExtensions.match(extName) != None):
+                self.gen.logMsg('diag', '*** Including extension',
+                    extName, '(matches explicitly requested extensions to add)')
+                include = True
+            # Remove extensions if the name matches the regexp specified
+            # in generator options. This allows forcing removal of
+            # extensions from an interface even if they're tagged that
+            # way in the registry.
+            if (regRemoveExtensions.match(extName) != None):
+                self.gen.logMsg('diag', '*** Removing extension',
+                    extName, '(matches explicitly requested extensions to remove)')
+                include = False
+            #
+            # If the extension is to be included, add it to the
+            # extension features list.
+            if (include):
+                ei.emit = True
+                features.append(ei)
+            else:
+                self.gen.logMsg('diag', '*** NOT including extension',
+                    extName, '(does not match api attribute or explicitly requested extensions)')
+        #
+        # Sort the extension features list, if a sort procedure is defined
+        if (self.genOpts.sortProcedure):
+            self.genOpts.sortProcedure(features)
+        #
+        # Pass 1: loop over requested API versions and extensions tagging
+        #   types/commands/features as required (in an <require> block) or no
+        #   longer required (in an <remove> block). It is possible to remove
+        #   a feature in one version and restore it later by requiring it in
+        #   a later version.
+        # If a profile other than 'None' is being generated, it must
+        #   match the profile attribute (if any) of the <require> and
+        #   <remove> tags.
+        self.gen.logMsg('diag', '*** PASS 1: TAG FEATURES ********************************************')
+        for f in features:
+            self.gen.logMsg('diag', '*** PASS 1: Tagging required and removed features for',
+                f.name)
+            self.requireAndRemoveFeatures(f.elem, self.genOpts.apiname, self.genOpts.profile)
+        #
+        # Pass 2: loop over specified API versions and extensions printing
+        #   declarations for required things which haven't already been
+        #   generated.
+        self.gen.logMsg('diag', '*** PASS 2: GENERATE INTERFACES FOR FEATURES ************************')
+        self.gen.beginFile(self.genOpts)
+        for f in features:
+            self.gen.logMsg('diag', '*** PASS 2: Generating interface for',
+                f.name)
+            emit = self.emitFeatures = f.emit
+            if (not emit):
+                self.gen.logMsg('diag', '*** PASS 2: NOT declaring feature',
+                    f.elem.get('name'), 'because it is not tagged for emission')
+            # Generate the interface (or just tag its elements as having been
+            # emitted, if they haven't been).
+            self.gen.beginFeature(f.elem, emit)
+            self.generateRequiredInterface(f.elem)
+            self.gen.endFeature()
+        self.gen.endFile()
+    #
+    # apiReset - use between apiGen() calls to reset internal state
+    #
+    def apiReset(self):
+        """Reset type/enum/command dictionaries before generating another API"""
+        for type in self.typedict:
+            self.typedict[type].resetState()
+        for enum in self.enumdict:
+            self.enumdict[enum].resetState()
+        for cmd in self.cmddict:
+            self.cmddict[cmd].resetState()
+        for cmd in self.apidict:
+            self.apidict[cmd].resetState()
+    #
+    # validateGroups - check that group= attributes match actual groups
+    #
+    def validateGroups(self):
+        """Validate group= attributes on <param> and <proto> tags"""
+        # Keep track of group names not in <group> tags
+        badGroup = {}
+        self.gen.logMsg('diag', '*** VALIDATING GROUP ATTRIBUTES ***')
+        for cmd in self.reg.findall('commands/command'):
+            proto = cmd.find('proto')
+            funcname = cmd.find('proto/name').text
+            if ('group' in proto.attrib.keys()):
+                group = proto.get('group')
+                # self.gen.logMsg('diag', '*** Command ', funcname, ' has return group ', group)
+                if (group not in self.groupdict.keys()):
+                    # self.gen.logMsg('diag', '*** Command ', funcname, ' has UNKNOWN return group ', group)
+                    if (group not in badGroup.keys()):
+                        badGroup[group] = 1
+                    else:
+                        badGroup[group] = badGroup[group] +  1
+            for param in cmd.findall('param'):
+                pname = param.find('name')
+                if (pname != None):
+                    pname = pname.text
+                else:
+                    pname = type.get('name')
+                if ('group' in param.attrib.keys()):
+                    group = param.get('group')
+                    if (group not in self.groupdict.keys()):
+                        # self.gen.logMsg('diag', '*** Command ', funcname, ' param ', pname, ' has UNKNOWN group ', group)
+                        if (group not in badGroup.keys()):
+                            badGroup[group] = 1
+                        else:
+                            badGroup[group] = badGroup[group] +  1
+        if (len(badGroup.keys()) > 0):
+            self.gen.logMsg('diag', '*** SUMMARY OF UNRECOGNIZED GROUPS ***')
+            for key in sorted(badGroup.keys()):
+                self.gen.logMsg('diag', '    ', key, ' occurred ', badGroup[key], ' times')
diff --git a/vk.xml b/vk.xml
new file mode 100644
index 0000000..f9471b3
--- /dev/null
+++ b/vk.xml
@@ -0,0 +1,5037 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<registry>
+    <comment>
+Copyright (c) 2015 The Khronos Group Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and/or associated documentation files (the
+"Materials"), to deal in the Materials without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Materials, and to
+permit persons to whom the Materials are furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Materials.
+
+THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+
+------------------------------------------------------------------------
+
+This file, vk.xml, is the Vulkan API Registry. It is a critically important
+and normative part of the Vulkan Specification, including a canonical
+machine-readable definition of the API, parameter and member validation
+language incorporated into the Specification and reference pages, and other
+material which is registered by Khronos, such as tags used by extension and
+layer authors. The only authoritative version of vk.xml is the one
+maintained in the master branch of the Khronos Vulkan Github project.
+    </comment>
+
+    <!-- SECTION: Vulkan vendor/author tags for extensions and layers -->
+    <tags>
+        <tag name="IMG"         author="Imagination Technologies"      contact="Michael Worcester @michaelworcester"/>
+        <tag name="AMD"         author="Advanced Micro Devices, Inc."  contact="Daniel Rakos @aqnuep"/>
+        <tag name="ARM"         author="ARM Limited"                   contact="Jan-Harald Fredriksen @janharald"/>
+        <tag name="FSL"         author="Freescale Semiconductor, Inc." contact="Norbert Nopper @FslNopper"/>
+        <tag name="BRCM"        author="Broadcom Corporation"          contact="Graeme Leese @gnl21"/>
+        <tag name="NXP"         author="NXP Semiconductors N.V."       contact="Norbert Nopper @FslNopper"/>
+        <tag name="NV"          author="NVIDIA Corporation"            contact="Daniel Koch @dgkoch"/>
+        <tag name="NVX"         author="NVIDIA Corporation"            contact="Daniel Koch @dgkoch"/>
+        <tag name="VIV"         author="Vivante Corporation"           contact="Yanjun Zhang @yanjunzhang"/>
+        <tag name="KDAB"        author="KDAB"                          contact="Sean Harmer @seanharmer"/>
+        <tag name="ANDROID"     author="Google, Inc."                  contact="Jesse Hall @jessehall"/>
+        <tag name="CHROMIUM"    author="Google, Inc."                  contact="Jesse Hall @jessehall"/>
+        <tag name="GOOGLE"      author="Google, Inc."                  contact="Jesse Hall @jessehall"/>
+        <tag name="QCOM"        author="Qualcomm Technologies, Inc."   contact="Maurice Ribble @mribble"/>
+        <tag name="LUNARG"      author="LunarG, Inc."                  contact="Karen Ghavam @KarenGhavam"/>
+        <tag name="SAMSUNG"     author="Samsung Electronics Co., Ltd." contact="Alon Or-bach @alonorbach"/>
+        <tag name="SEC"         author="Samsung Electronics Co., Ltd." contact="Alon Or-bach @alonorbach"/>
+        <tag name="TIZEN"       author="Samsung Electronics Co., Ltd." contact="Alon Or-bach @alonorbach"/>
+        <tag name="RENDERDOC"   author="RenderDoc (renderdoc.org)"     contact="baldurk@baldurk.org"/>
+    </tags>
+
+    <!-- SECTION: Vulkan type definitions -->
+    <types>
+        <type name="vk_platform" category="include">#include "vk_platform.h"</type>
+            <!-- WSI extensions -->
+        <type category="include">#include "<name>vulkan.h</name>"</type>
+        <type category="include">#include &lt;<name>X11/Xlib.h</name>&gt;</type>
+        <type category="include">#include &lt;<name>android/native_window.h</name>&gt;</type>
+        <type category="include">#include &lt;<name>mir_toolkit/client_types.h</name>&gt;</type>
+        <type category="include">#include &lt;<name>wayland-client.h</name>&gt;</type>
+        <type category="include">#include &lt;<name>windows.h</name>&gt;</type>
+        <type category="include">#include &lt;<name>xcb/xcb.h</name>&gt;</type>
+
+        <type requires="X11/Xlib.h" name="Display"/>
+        <type requires="X11/Xlib.h" name="VisualID"/>
+        <type requires="X11/Xlib.h" name="Window"/>
+        <type requires="android/native_window.h" name="ANativeWindow"/>
+        <type requires="mir_toolkit/client_types.h" name="MirConnection"/>
+        <type requires="mir_toolkit/client_types.h" name="MirSurface"/>
+        <type requires="wayland-client.h" name="wl_display"/>
+        <type requires="wayland-client.h" name="wl_surface"/>
+        <type requires="windows.h" name="HINSTANCE"/>
+        <type requires="windows.h" name="HWND"/>
+        <type requires="xcb/xcb.h" name="xcb_connection_t"/>
+        <type requires="xcb/xcb.h" name="xcb_visualid_t"/>
+        <type requires="xcb/xcb.h" name="xcb_window_t"/>
+
+        <type category="define">#define <name>VK_MAKE_VERSION</name>(major, minor, patch) \
+    ((major &lt;&lt; 22) | (minor &lt;&lt; 12) | patch)</type>
+
+        <type category="define">// Vulkan API version supported by this file
+#define <name>VK_API_VERSION</name> <type>VK_MAKE_VERSION</type>(1, 0, 1)</type>
+
+
+        <type category="define">
+#define <name>VK_DEFINE_HANDLE</name>(object) typedef struct object##_T* object;</type>
+
+        <type category="define" name="VK_DEFINE_NON_DISPATCHABLE_HANDLE">
+#if defined(__LP64__) || defined(_WIN64) || defined(__x86_64__) || defined(_M_X64) || defined(__ia64) || defined (_M_IA64) || defined(__aarch64__) || defined(__powerpc64__)
+        #define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef struct object##_T *object;
+#else
+        #define VK_DEFINE_NON_DISPATCHABLE_HANDLE(object) typedef uint64_t object;
+#endif
+        </type>
+
+        <type category="define">
+#define <name>VK_NULL_HANDLE</name> 0
+        </type>
+
+        <type category="basetype">typedef <type>uint32_t</type> <name>VkSampleMask</name>;</type>
+        <type category="basetype">typedef <type>uint32_t</type> <name>VkBool32</name>;</type>
+        <type category="basetype">typedef <type>uint32_t</type> <name>VkFlags</name>;</type>
+        <type category="basetype">typedef <type>uint64_t</type> <name>VkDeviceSize</name>;</type>
+        <!-- Basic C types, pulled in via vk_platform.h -->
+        <type requires="vk_platform" name="void"/>
+        <type requires="vk_platform" name="char"/>
+        <type requires="vk_platform" name="float"/>
+        <type requires="vk_platform" name="uint8_t"/>
+        <type requires="vk_platform" name="uint32_t"/>
+        <type requires="vk_platform" name="uint64_t"/>
+        <type requires="vk_platform" name="int32_t"/>
+        <type requires="vk_platform" name="size_t"/>
+        <!-- Bitfield types -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkFramebufferCreateFlags</name>;</type>               <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkQueryPoolCreateFlags</name>;</type>                 <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkRenderPassCreateFlags</name>;</type>                <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkSamplerCreateFlags</name>;</type>                   <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineLayoutCreateFlags</name>;</type>            <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineCacheCreateFlags</name>;</type>             <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineDepthStencilStateCreateFlags</name>;</type> <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineDynamicStateCreateFlags</name>;</type>      <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineColorBlendStateCreateFlags</name>;</type>   <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineMultisampleStateCreateFlags</name>;</type>  <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineRasterizationStateCreateFlags</name>;</type>       <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineViewportStateCreateFlags</name>;</type>     <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineTessellationStateCreateFlags</name>;</type> <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineInputAssemblyStateCreateFlags</name>;</type><!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineVertexInputStateCreateFlags</name>;</type>  <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineShaderStageCreateFlags</name>;</type>       <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDescriptorSetLayoutCreateFlags</name>;</type>       <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkBufferViewCreateFlags</name>;</type>                <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkInstanceCreateFlags</name>;</type>                  <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDeviceCreateFlags</name>;</type>                    <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDeviceQueueCreateFlags</name>;</type>               <!-- creation flags -->
+        <type requires="VkQueueFlagBits"                  category="bitmask">typedef <type>VkFlags</type> <name>VkQueueFlags</name>;</type>                       <!-- Queue capabilities -->
+        <type requires="VkMemoryPropertyFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkMemoryPropertyFlags</name>;</type>              <!-- Memory properties passed into vkAllocateMemory(). -->
+        <type requires="VkMemoryHeapFlagBits"             category="bitmask">typedef <type>VkFlags</type> <name>VkMemoryHeapFlags</name>;</type>                  <!-- Memory heap flags -->
+        <type requires="VkAccessFlagBits"                 category="bitmask">typedef <type>VkFlags</type> <name>VkAccessFlags</name>;</type>                      <!-- Memory access flags passed to barrier/dependency operations -->
+        <type requires="VkBufferUsageFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkBufferUsageFlags</name>;</type>                 <!-- Buffer usage flags -->
+        <type requires="VkBufferCreateFlagBits"           category="bitmask">typedef <type>VkFlags</type> <name>VkBufferCreateFlags</name>;</type>                <!-- Buffer creation flags -->
+        <type requires="VkShaderStageFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkShaderStageFlags</name>;</type>                 <!-- Shader stage flags -->
+        <type requires="VkImageUsageFlagBits"             category="bitmask">typedef <type>VkFlags</type> <name>VkImageUsageFlags</name>;</type>                  <!-- Image usage flags -->
+        <type requires="VkImageCreateFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkImageCreateFlags</name>;</type>                 <!-- Image creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkImageViewCreateFlags</name>;</type>             <!-- Image view creation flags (no bits yet) -->
+        <type requires="VkPipelineCreateFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineCreateFlags</name>;</type>              <!-- Pipeline creation flags -->
+        <type requires="VkColorComponentFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkColorComponentFlags</name>;</type>              <!-- Color component flags -->
+        <type requires="VkFenceCreateFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkFenceCreateFlags</name>;</type>                 <!-- Fence creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkSemaphoreCreateFlags</name>;</type>             <!-- Semaphore creation flags -->
+        <type requires="VkFormatFeatureFlagBits"          category="bitmask">typedef <type>VkFlags</type> <name>VkFormatFeatureFlags</name>;</type>               <!-- Format capability flags -->
+        <type requires="VkQueryControlFlagBits"           category="bitmask">typedef <type>VkFlags</type> <name>VkQueryControlFlags</name>;</type>                <!-- Query control flags -->
+        <type requires="VkQueryResultFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkQueryResultFlags</name>;</type>                 <!-- Query result flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkShaderModuleCreateFlags</name>;</type>          <!-- Shader module creation flags (no bits yet) -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkEventCreateFlags</name>;</type>                 <!-- Event creation flags  (no bits yet) -->
+        <type requires="VkCommandPoolCreateFlagBits"          category="bitmask">typedef <type>VkFlags</type> <name>VkCommandPoolCreateFlags</name>;</type>               <!-- Command pool creation flags -->
+        <type requires="VkCommandPoolResetFlagBits"           category="bitmask">typedef <type>VkFlags</type> <name>VkCommandPoolResetFlags</name>;</type>                <!-- Command pool reset flags -->
+        <type requires="VkCommandBufferResetFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkCommandBufferResetFlags</name>;</type>              <!-- Command buffer reset flags -->
+        <type requires="VkCommandBufferUsageFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkCommandBufferUsageFlags</name>;</type>              <!-- Command buffer usage flags -->
+        <type requires="VkQueryPipelineStatisticFlagBits" category="bitmask">typedef <type>VkFlags</type> <name>VkQueryPipelineStatisticFlags</name>;</type>      <!-- Pipeline statistics flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkMemoryMapFlags</name>;</type>                   <!-- Memory mapping flags (no bits yet) -->
+        <type requires="VkImageAspectFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkImageAspectFlags</name>;</type>                 <!-- Bitfield of image aspects -->
+        <type requires="VkSparseMemoryBindFlagBits"       category="bitmask">typedef <type>VkFlags</type> <name>VkSparseMemoryBindFlags</name>;</type>            <!-- Sparse memory bind flags -->
+        <type requires="VkSparseImageFormatFlagBits"      category="bitmask">typedef <type>VkFlags</type> <name>VkSparseImageFormatFlags</name>;</type>           <!-- Sparse image memory requirements flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkSubpassDescriptionFlags</name>;</type>          <!-- Subpass description flags -->
+        <type requires="VkPipelineStageFlagBits"          category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineStageFlags</name>;</type>               <!-- Pipeline stages -->
+        <type requires="VkSampleCountFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkSampleCountFlags</name>;</type>                 <!-- Pipeline stages -->
+        <type requires="VkAttachmentDescriptionFlagBits"  category="bitmask">typedef <type>VkFlags</type> <name>VkAttachmentDescriptionFlags</name>;</type>       <!-- Render pass attachment description flags -->
+        <type requires="VkStencilFaceFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkStencilFaceFlags</name>;</type>                 <!-- Stencil face flags -->
+        <type requires="VkCullModeFlagBits"               category="bitmask">typedef <type>VkFlags</type> <name>VkCullModeFlags</name>;</type>                    <!-- Cull mode flags -->
+        <type requires="VkDescriptorPoolCreateFlagBits"   category="bitmask">typedef <type>VkFlags</type> <name>VkDescriptorPoolCreateFlags</name>;</type>        <!-- Descriptor pool creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDescriptorPoolResetFlags</name>;</type>         <!-- Descriptor pool reset flags -->
+        <type requires="VkDependencyFlagBits"             category="bitmask">typedef <type>VkFlags</type> <name>VkDependencyFlags</name>;</type>                  <!-- Pipeline barrier and subpass dependency flags -->
+            <!-- WSI extensions -->
+        <type requires="VkCompositeAlphaFlagBitsKHR"      category="bitmask">typedef <type>VkFlags</type> <name>VkCompositeAlphaFlagsKHR</name>;</type>
+        <type requires="VkDisplayPlaneAlphaFlagBitsKHR"   category="bitmask">typedef <type>VkFlags</type> <name>VkDisplayPlaneAlphaFlagsKHR</name>;</type>
+        <type requires="VkSurfaceTransformFlagBitsKHR"    category="bitmask">typedef <type>VkFlags</type> <name>VkSurfaceTransformFlagsKHR</name>;</type>
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkSwapchainCreateFlagsKHR</name>;</type>          <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDisplayModeCreateFlagsKHR</name>;</type>        <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDisplaySurfaceCreateFlagsKHR</name>;</type>     <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkAndroidSurfaceCreateFlagsKHR</name>;</type>     <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkMirSurfaceCreateFlagsKHR</name>;</type>         <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkWaylandSurfaceCreateFlagsKHR</name>;</type>     <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkWin32SurfaceCreateFlagsKHR</name>;</type>       <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkXlibSurfaceCreateFlagsKHR</name>;</type>        <!-- creation flags -->
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkXcbSurfaceCreateFlagsKHR</name>;</type>         <!-- creation flags -->
+
+        <type requires="VkDebugReportFlagBitsEXT"      category="bitmask">typedef <type>VkFlags</type> <name>VkDebugReportFlagsEXT</name>;</type>
+
+        <!-- Types which can be void pointers or class pointers, selected at compile time -->
+        <type category="handle"><type>VK_DEFINE_HANDLE</type>(<name>VkInstance</name>)</type>
+        <type category="handle" parent="VkInstance"><type>VK_DEFINE_HANDLE</type>(<name>VkPhysicalDevice</name>)</type>
+        <type category="handle" parent="VkPhysicalDevice"><type>VK_DEFINE_HANDLE</type>(<name>VkDevice</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_HANDLE</type>(<name>VkQueue</name>)</type>
+        <type category="handle" parent="VkCommandPool"><type>VK_DEFINE_HANDLE</type>(<name>VkCommandBuffer</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDeviceMemory</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkCommandPool</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBuffer</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBufferView</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImage</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImageView</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkShaderModule</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipeline</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineLayout</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSampler</name>)</type>
+        <type category="handle" parent="VkDescriptorPool"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSet</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSetLayout</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorPool</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFence</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSemaphore</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkEvent</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkQueryPool</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFramebuffer</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkRenderPass</name>)</type>
+        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineCache</name>)</type>
+
+        <!-- WSI extensions -->
+        <type category="handle"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayKHR</name>)</type>
+        <type category="handle" parent="VkPhysicalDevice,VkDisplayKHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayModeKHR</name>)</type>
+        <type category="handle" parent="VkInstance"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSurfaceKHR</name>)</type>
+        <type category="handle" parent="VkSurfaceKHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSwapchainKHR</name>)</type>
+        <type category="handle" parent="VkInstance"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDebugReportCallbackEXT</name>)</type>
+
+        <!-- Types generated from corresponding <enums> tags below -->
+        <type name="VkAttachmentLoadOp" category="enum"/>
+        <type name="VkAttachmentStoreOp" category="enum"/>
+        <type name="VkBlendFactor" category="enum"/>
+        <type name="VkBlendOp" category="enum"/>
+        <type name="VkBorderColor" category="enum"/>
+        <type name="VkFramebufferCreateFlagBits" category="enum"/>
+        <type name="VkQueryPoolCreateFlagBits" category="enum"/>
+        <type name="VkRenderPassCreateFlagBits" category="enum"/>
+        <type name="VkSamplerCreateFlagBits" category="enum"/>
+        <type name="VkPipelineCacheHeaderVersion" category="enum"/>
+        <type name="VkPipelineLayoutCreateFlagBits" category="enum"/>
+        <type name="VkPipelineCacheCreateFlagBits" category="enum"/>
+        <type name="VkPipelineDepthStencilStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineDynamicStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineColorBlendStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineMultisampleStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineRasterizationStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineViewportStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineTessellationStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineInputAssemblyStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineVertexInputStateCreateFlagBits" category="enum"/>
+        <type name="VkPipelineShaderStageCreateFlagBits" category="enum"/>
+        <type name="VkDescriptorSetLayoutCreateFlagBits" category="enum"/>
+        <type name="VkBufferViewCreateFlagBits" category="enum"/>
+        <type name="VkInstanceCreateFlagBits" category="enum"/>
+        <type name="VkDeviceQueueCreateFlagBits" category="enum"/>
+        <type name="VkBufferCreateFlagBits" category="enum"/>
+        <type name="VkBufferUsageFlagBits" category="enum"/>
+        <type name="VkColorComponentFlagBits" category="enum"/>
+        <type name="VkComponentSwizzle" category="enum"/>
+        <type name="VkCommandPoolCreateFlagBits" category="enum"/>
+        <type name="VkCommandPoolResetFlagBits" category="enum"/>
+        <type name="VkCommandBufferResetFlagBits" category="enum"/>
+        <type name="VkCommandBufferLevel" category="enum"/>
+        <type name="VkCommandBufferUsageFlagBits" category="enum"/>
+        <type name="VkCompareOp" category="enum"/>
+        <type name="VkCullModeFlagBits" category="enum"/>
+        <type name="VkDescriptorType" category="enum"/>
+        <type name="VkDeviceCreateFlagBits" category="enum"/>
+        <type name="VkDynamicState" category="enum"/>
+        <type name="VkFenceCreateFlagBits" category="enum"/>
+        <type name="VkPolygonMode" category="enum"/>
+        <type name="VkFormat" category="enum"/>
+        <type name="VkFormatFeatureFlagBits" category="enum"/>
+        <type name="VkFrontFace" category="enum"/>
+        <type name="VkImageAspectFlagBits" category="enum"/>
+        <type name="VkImageCreateFlagBits" category="enum"/>
+        <type name="VkImageLayout" category="enum"/>
+        <type name="VkImageTiling" category="enum"/>
+        <type name="VkImageType" category="enum"/>
+        <type name="VkImageUsageFlagBits" category="enum"/>
+        <type name="VkImageViewType" category="enum"/>
+        <type name="VkSharingMode" category="enum"/>
+        <type name="VkIndexType" category="enum"/>
+        <type name="VkLogicOp" category="enum"/>
+        <type name="VkMemoryHeapFlagBits" category="enum"/>
+        <type name="VkAccessFlagBits" category="enum"/>
+        <type name="VkMemoryPropertyFlagBits" category="enum"/>
+        <type name="VkPhysicalDeviceType" category="enum"/>
+        <type name="VkPipelineBindPoint" category="enum"/>
+        <type name="VkPipelineCreateFlagBits" category="enum"/>
+        <type name="VkPrimitiveTopology" category="enum"/>
+        <type name="VkQueryControlFlagBits" category="enum"/>
+        <type name="VkQueryPipelineStatisticFlagBits" category="enum"/>
+        <type name="VkQueryResultFlagBits" category="enum"/>
+        <type name="VkQueryType" category="enum"/>
+        <type name="VkQueueFlagBits" category="enum"/>
+        <type name="VkSubpassContents" category="enum"/>
+        <type name="VkResult" category="enum"/>
+        <type name="VkShaderStageFlagBits" category="enum"/>
+        <type name="VkSparseMemoryBindFlagBits" category="enum"/>
+        <type name="VkStencilFaceFlagBits" category="enum"/>
+        <type name="VkStencilOp" category="enum"/>
+        <type name="VkStructureType" category="enum"/>
+        <type name="VkSystemAllocationScope" category="enum"/>
+        <type name="VkInternalAllocationType" category="enum"/>
+        <type name="VkSamplerAddressMode" category="enum"/>
+        <type name="VkFilter" category="enum"/>
+        <type name="VkSamplerMipmapMode" category="enum"/>
+        <type name="VkVertexInputRate" category="enum"/>
+        <type name="VkPipelineStageFlagBits" category="enum"/>
+        <type name="VkSparseImageFormatFlagBits" category="enum"/>
+        <type name="VkSampleCountFlagBits" category="enum"/>
+        <type name="VkAttachmentDescriptionFlagBits" category="enum"/>
+        <type name="VkDescriptorPoolCreateFlagBits" category="enum"/>
+        <type name="VkDependencyFlagBits" category="enum"/>
+        <!-- WSI extensions -->
+        <type name="VkColorSpaceKHR" category="enum"/>
+        <type name="VkCompositeAlphaFlagBitsKHR" category="enum"/>
+        <type name="VkDisplayPlaneAlphaFlagBitsKHR" category="enum"/>
+        <type name="VkPresentModeKHR" category="enum"/>
+        <type name="VkSurfaceTransformFlagBitsKHR" category="enum"/>
+        <type name="VkDebugReportFlagBitsEXT" category="enum"/>
+        <type name="VkDebugReportObjectTypeEXT" category="enum"/>
+        <type name="VkDebugReportErrorEXT" category="enum"/>
+
+        <!-- The PFN_vk*Function types are used by VkAllocationCallbacks below -->
+        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkInternalAllocationNotification</name>)(
+    <type>void</type>*                                       pUserData,
+    <type>size_t</type>                                      size,
+    <type>VkInternalAllocationType</type>                    allocationType,
+    <type>VkSystemAllocationScope</type>                     allocationScope);</type>
+        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkInternalFreeNotification</name>)(
+    <type>void</type>*                                       pUserData,
+    <type>size_t</type>                                      size,
+    <type>VkInternalAllocationType</type>                    allocationType,
+    <type>VkSystemAllocationScope</type>                     allocationScope);</type>
+        <type category="funcpointer">typedef void* (VKAPI_PTR *<name>PFN_vkReallocationFunction</name>)(
+    <type>void</type>*                                       pUserData,
+    <type>void</type>*                                       pOriginal,
+    <type>size_t</type>                                      size,
+    <type>size_t</type>                                      alignment,
+    <type>VkSystemAllocationScope</type>                     allocationScope);</type>
+        <type category="funcpointer">typedef void* (VKAPI_PTR *<name>PFN_vkAllocationFunction</name>)(
+    <type>void</type>*                                       pUserData,
+    <type>size_t</type>                                      size,
+    <type>size_t</type>                                      alignment,
+    <type>VkSystemAllocationScope</type>                     allocationScope);</type>
+        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkFreeFunction</name>)(
+    <type>void</type>*                                       pUserData,
+    <type>void</type>*                                       pMemory);</type>
+
+    <!-- The PFN_vkVoidFunction type are used by VkGet*ProcAddr below -->
+        <type category="funcpointer">typedef void (VKAPI_PTR *<name>PFN_vkVoidFunction</name>)(void);</type>
+
+    <!-- The PFN_vkDebugReportCallbackEXT type are used by the DEBUG_REPORT extension-->
+        <type category="funcpointer">typedef VkBool32 (VKAPI_PTR *<name>PFN_vkDebugReportCallbackEXT</name>)(
+    <type>VkDebugReportFlagsEXT</type>                       flags,
+    <type>VkDebugReportObjectTypeEXT</type>                  objectType,
+    <type>uint64_t</type>                                    object,
+    <type>size_t</type>                                      location,
+    <type>int32_t</type>                                     messageCode,
+    const <type>char</type>*                                 pLayerPrefix,
+    const <type>char</type>*                                 pMessage,
+    <type>void</type>*                                       pUserData);</type>
+
+        <!-- Struct types -->
+        <type category="struct" name="VkOffset2D">
+            <member><type>int32_t</type>        <name>x</name></member>
+            <member><type>int32_t</type>        <name>y</name></member>
+        </type>
+        <type category="struct" name="VkOffset3D">
+            <member><type>int32_t</type>        <name>x</name></member>
+            <member><type>int32_t</type>        <name>y</name></member>
+            <member><type>int32_t</type>        <name>z</name></member>
+        </type>
+        <type category="struct" name="VkExtent2D">
+            <member><type>uint32_t</type>        <name>width</name></member>
+            <member><type>uint32_t</type>        <name>height</name></member>
+        </type>
+        <type category="struct" name="VkExtent3D">
+            <member><type>uint32_t</type>        <name>width</name></member>
+            <member><type>uint32_t</type>        <name>height</name></member>
+            <member><type>uint32_t</type>        <name>depth</name></member>
+        </type>
+        <type category="struct" name="VkViewport">
+            <member><type>float</type>          <name>x</name></member>
+            <member><type>float</type>          <name>y</name></member>
+            <member><type>float</type>          <name>width</name></member>
+            <member><type>float</type>          <name>height</name></member>
+            <member><type>float</type>          <name>minDepth</name></member>
+            <member><type>float</type>          <name>maxDepth</name></member>
+            <validity>
+                <usage>pname:width must: be greater than `0.0` and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxViewportDimensions[0]</usage>
+                <usage>pname:height must: be greater than `0.0` and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxViewportDimensions[1]</usage>
+                <usage>pname:x and pname:y must: each be between pname:viewportBoundsRange[0] and pname:viewportBoundsRange[1], inclusive</usage>
+                <usage>pname:x + pname:width must: be less than or equal to pname:viewportBoundsRange[1]</usage>
+                <usage>pname:y + pname:height must: be less than or equal to pname:viewportBoundsRange[1]</usage>
+                <usage>pname:minDepth must: be between `0.0` and `1.0`, inclusive</usage>
+                <usage>pname:maxDepth must: be between `0.0` and `1.0`, inclusive</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkRect2D">
+            <member><type>VkOffset2D</type>     <name>offset</name></member>
+            <member><type>VkExtent2D</type>     <name>extent</name></member>
+        </type>
+        <type category="struct" name="VkRect3D">
+            <member><type>VkOffset3D</type>     <name>offset</name></member>
+            <member><type>VkExtent3D</type>     <name>extent</name></member>
+        </type>
+        <type category="struct" name="VkClearRect">
+            <member><type>VkRect2D</type>       <name>rect</name></member>
+            <member><type>uint32_t</type>       <name>baseArrayLayer</name></member>
+            <member><type>uint32_t</type>       <name>layerCount</name></member>
+        </type>
+        <type category="struct" name="VkComponentMapping">
+            <member><type>VkComponentSwizzle</type> <name>r</name></member>
+            <member><type>VkComponentSwizzle</type> <name>g</name></member>
+            <member><type>VkComponentSwizzle</type> <name>b</name></member>
+            <member><type>VkComponentSwizzle</type> <name>a</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceProperties" returnedonly="true">
+            <member><type>uint32_t</type>       <name>apiVersion</name></member>
+            <member><type>uint32_t</type>       <name>driverVersion</name></member>
+            <member><type>uint32_t</type>       <name>vendorID</name></member>
+            <member><type>uint32_t</type>       <name>deviceID</name></member>
+            <member><type>VkPhysicalDeviceType</type> <name>deviceType</name></member>
+            <member><type>char</type>           <name>deviceName</name>[<enum>VK_MAX_PHYSICAL_DEVICE_NAME_SIZE</enum>]</member>
+            <member><type>uint8_t</type>        <name>pipelineCacheUUID</name>[<enum>VK_UUID_SIZE</enum>]</member>
+            <member><type>VkPhysicalDeviceLimits</type> <name>limits</name></member>
+            <member><type>VkPhysicalDeviceSparseProperties</type> <name>sparseProperties</name></member>
+        </type>
+        <type category="struct" name="VkExtensionProperties" returnedonly="true">
+            <member><type>char</type>            <name>extensionName</name>[<enum>VK_MAX_EXTENSION_NAME_SIZE</enum>]</member> <!-- extension name -->
+            <member><type>uint32_t</type>        <name>specVersion</name></member>                    <!-- version of the extension specification implemented -->
+        </type>
+        <type category="struct" name="VkLayerProperties" returnedonly="true">
+            <member><type>char</type>            <name>layerName</name>[<enum>VK_MAX_EXTENSION_NAME_SIZE</enum>]</member> <!-- layer name -->
+            <member><type>uint32_t</type>        <name>specVersion</name></member>                    <!-- version of the layer specification implemented -->
+            <member><type>uint32_t</type>        <name>implementationVersion</name></member>                    <!-- build or release version of the layer's library -->
+            <member><type>char</type>            <name>description</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member> <!-- Free-form description of the layer -->
+        </type>
+        <type category="struct" name="VkApplicationInfo">
+            <member><type>VkStructureType</type> <name>sType</name></member>                          <!-- Type of structure. Should be VK_STRUCTURE_TYPE_APPLICATION_INFO -->
+            <member>const <type>void</type>*     <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true" len="null-terminated">const <type>char</type>*     <name>pApplicationName</name></member>
+            <member><type>uint32_t</type>        <name>applicationVersion</name></member>
+            <member optional="true" len="null-terminated">const <type>char</type>*     <name>pEngineName</name></member>
+            <member><type>uint32_t</type>        <name>engineVersion</name></member>
+            <member><type>uint32_t</type>        <name>apiVersion</name></member>
+            <validity>
+                <usage>pname:apiVersion must: be a version that the implementation supports, or supports an effective substitute for</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkAllocationCallbacks">
+            <member optional="true"><type>void</type>*           <name>pUserData</name></member>
+            <member><type>PFN_vkAllocationFunction</type>   <name>pfnAllocation</name></member>
+            <member><type>PFN_vkReallocationFunction</type> <name>pfnReallocation</name></member>
+            <member><type>PFN_vkFreeFunction</type>    <name>pfnFree</name></member>
+            <member optional="true"><type>PFN_vkInternalAllocationNotification</type> <name>pfnInternalAllocation</name></member>
+            <member optional="true"><type>PFN_vkInternalFreeNotification</type> <name>pfnInternalFree</name></member>
+            <validity>
+                <usage>pname:pfnAllocation must: be a pointer to a valid user-defined PFN_vkAllocationFunction</usage>
+                <usage>pname:pfnReallocation must: be a pointer to a valid user-defined PFN_vkReallocationFunction</usage>
+                <usage>pname:pfnFree must: be a pointer to a valid user-defined PFN_vkFreeFunction</usage>
+                <usage>If either of pname:pfnInternalAllocatione or pname:pfnInternalFree is not `NULL`, both must: be valid callbacks</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDeviceQueueCreateInfo">
+            <member><type>VkStructureType</type> <name>sType</name></member>                          <!-- Should be VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO -->
+            <member>const <type>void</type>*     <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDeviceQueueCreateFlags</type>    <name>flags</name></member>              <!-- Reserved -->
+            <member><type>uint32_t</type>        <name>queueFamilyIndex</name></member>
+            <member><type>uint32_t</type>        <name>queueCount</name></member>
+            <member len="queueCount">const <type>float</type>*    <name>pQueuePriorities</name></member>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties</usage>
+                <usage>pname:queueCount must: be less than or equal to the value of the pname:queueCount member of the sname:VkQueueFamilyProperties structure, as returned by fname:vkGetPhysicalDeviceQueueFamilyProperties in the pname:pQueueFamilyProperties[pname:queueFamilyIndex]</usage>
+                <usage>The value of any given element of pname:pQueuePriorities must: be between `0.0` and `1.0` inclusive</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDeviceCreateInfo">
+            <member><type>VkStructureType</type> <name>sType</name></member>                          <!-- Should be VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO -->
+            <member>const <type>void</type>*     <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDeviceCreateFlags</type>    <name>flags</name></member>                   <!-- Reserved -->
+            <member><type>uint32_t</type>        <name>queueCreateInfoCount</name></member>
+            <member len="queueCreateInfoCount">const <type>VkDeviceQueueCreateInfo</type>* <name>pQueueCreateInfos</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>enabledLayerCount</name></member>
+            <member optional="true" len="enabledLayerCount,null-terminated">const <type>char</type>* const*      <name>ppEnabledLayerNames</name></member>            <!-- Ordered list of layer names to be enabled -->
+            <member optional="true"><type>uint32_t</type>               <name>enabledExtensionCount</name></member>
+            <member optional="true" len="enabledExtensionCount,null-terminated">const <type>char</type>* const*      <name>ppEnabledExtensionNames</name></member>
+            <member>const <type>VkPhysicalDeviceFeatures</type>* <name>pEnabledFeatures</name></member>
+            <validity>
+                <usage>Any given element of pname:ppEnabledLayerNames must: be the name of a layer present on the system, exactly matching a string returned in the sname:VkLayerProperties structure by fname:vkEnumerateDeviceLayerProperties</usage>
+                <usage>Any given element of pname:ppEnabledExtensionNames must: be the name of an extension present on the system, exactly matching a string returned in the sname:VkExtensionProperties structure by fname:vkEnumerateDeviceExtensionProperties</usage>
+                <usage>If an extension listed in pname:ppEnabledExtensionNames is provided as part of a layer, then both the layer and extension must: be enabled to enable that extension</usage>
+                <usage>The pname:queueFamilyIndex member of any given element of pname:pQueueCreateInfos must: be unique within pname:pQueueCreateInfos</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkInstanceCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Should be VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkInstanceCreateFlags</type>  <name>flags</name></member>                          <!-- Reserved -->
+            <member optional="true">const <type>VkApplicationInfo</type>* <name>pApplicationInfo</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>enabledLayerCount</name></member>
+            <member len="enabledLayerCount,null-terminated">const <type>char</type>* const*      <name>ppEnabledLayerNames</name></member>            <!-- Ordered list of layer names to be enabled -->
+            <member optional="true"><type>uint32_t</type>               <name>enabledExtensionCount</name></member>
+            <member len="enabledExtensionCount,null-terminated">const <type>char</type>* const*      <name>ppEnabledExtensionNames</name></member>        <!-- Extension names to be enabled -->
+            <validity>
+                <usage>Any given element of pname:ppEnabledLayerNames must: be the name of a layer present on the system, exactly matching a string returned in the sname:VkLayerProperties structure by fname:vkEnumerateInstanceLayerProperties</usage>
+                <usage>Any given element of pname:ppEnabledExtensionNames must: be the name of an extension present on the system, exactly matching a string returned in the sname:VkExtensionProperties structure by fname:vkEnumerateInstanceExtensionProperties</usage>
+                <usage>If an extension listed in pname:ppEnabledExtensionNames is provided as part of a layer, then both the layer and extension must: be enabled to enable that extension</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkQueueFamilyProperties" returnedonly="true">
+            <member optional="true"><type>VkQueueFlags</type>           <name>queueFlags</name></member>                     <!-- Queue flags -->
+            <member><type>uint32_t</type>               <name>queueCount</name></member>
+            <member><type>uint32_t</type>               <name>timestampValidBits</name></member>
+            <member><type>VkExtent3D</type>             <name>minImageTransferGranularity</name></member>    <!-- Minimum alignment requirement for image transfers -->
+        </type>
+        <type category="struct" name="VkPhysicalDeviceMemoryProperties" returnedonly="true">
+            <member><type>uint32_t</type>               <name>memoryTypeCount</name></member>
+            <member><type>VkMemoryType</type>           <name>memoryTypes</name>[<enum>VK_MAX_MEMORY_TYPES</enum>]</member>
+            <member><type>uint32_t</type>               <name>memoryHeapCount</name></member>
+            <member><type>VkMemoryHeap</type>           <name>memoryHeaps</name>[<enum>VK_MAX_MEMORY_HEAPS</enum>]</member>
+        </type>
+        <type category="struct" name="VkMemoryAllocateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkDeviceSize</type>           <name>allocationSize</name></member>                 <!-- Size of memory allocation -->
+            <member><type>uint32_t</type>               <name>memoryTypeIndex</name></member>                <!-- Index of the of the memory type to allocate from -->
+            <validity>
+                <usage>The value of pname:allocationSize must: be less than or equal to the amount of memory available to the sname:VkMemoryHeap specified by pname:memoryTypeIndex and the calling command's sname:VkDevice</usage>
+                <usage>The value of pname:allocationSize must: be greater than `0`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkMemoryRequirements" returnedonly="true">
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>alignment</name></member>                      <!-- Specified in bytes -->
+            <member><type>uint32_t</type>               <name>memoryTypeBits</name></member>                 <!-- Bitfield of the allowed memory type indices into memoryTypes[] for this object -->
+        </type>
+        <type category="struct" name="VkSparseImageFormatProperties" returnedonly="true">
+            <member optional="true"><type>VkImageAspectFlags</type>     <name>aspectMask</name></member>
+            <member><type>VkExtent3D</type>             <name>imageGranularity</name></member>
+            <member optional="true"><type>VkSparseImageFormatFlags</type> <name>flags</name></member>
+        </type>
+        <type category="struct" name="VkSparseImageMemoryRequirements" returnedonly="true">
+            <member><type>VkSparseImageFormatProperties</type> <name>formatProperties</name></member>
+            <member><type>uint32_t</type>               <name>imageMipTailFirstLod</name></member>
+            <member><type>VkDeviceSize</type>           <name>imageMipTailSize</name></member>               <!-- Specified in bytes, must be a multiple of image block size / alignment -->
+            <member><type>VkDeviceSize</type>           <name>imageMipTailOffset</name></member>             <!-- Specified in bytes, must be a multiple of image block size / alignment -->
+            <member><type>VkDeviceSize</type>           <name>imageMipTailStride</name></member>             <!-- Specified in bytes, must be a multiple of image block size / alignment -->
+        </type>
+        <type category="struct" name="VkMemoryType" returnedonly="true">
+            <member optional="true"><type>VkMemoryPropertyFlags</type>  <name>propertyFlags</name></member>                  <!-- Memory properties of this memory type -->
+            <member><type>uint32_t</type>               <name>heapIndex</name></member>                      <!-- Index of the memory heap allocations of this memory type are taken from -->
+        </type>
+        <type category="struct" name="VkMemoryHeap" returnedonly="true">
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Available memory in the heap-->
+            <member optional="true"><type>VkMemoryHeapFlags</type>      <name>flags</name></member>                          <!-- Flags for the heap-->
+        </type>
+        <type category="struct" name="VkMappedMemoryRange">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkDeviceMemory</type>         <name>memory</name></member>                            <!-- Mapped memory object -->
+            <member><type>VkDeviceSize</type>           <name>offset</name></member>                         <!-- Offset within the mapped memory the range starts from -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Size of the range within the mapped memory -->
+            <validity>
+                <usage>pname:memory must: currently be mapped</usage>
+                <usage>pname:offset must: be less than the size of the currently mapped range of pname:memory</usage>
+                <usage>If pname:size is not equal to ename:VK_WHOLE_SIZE, the sum of pname:offset and pname:size must: be less than or equal to the size of the currently mapped range of pname:memory</usage>
+                <usage>pname:offset and pname:size must: each be a multiple of sname:VkPhysicalDeviceLimits::pname:nonCoherentAtomSize</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkFormatProperties" returnedonly="true">
+            <member optional="true"><type>VkFormatFeatureFlags</type>   <name>linearTilingFeatures</name></member>           <!-- Format features in case of linear tiling -->
+            <member optional="true"><type>VkFormatFeatureFlags</type>   <name>optimalTilingFeatures</name></member>          <!-- Format features in case of optimal tiling -->
+            <member optional="true"><type>VkFormatFeatureFlags</type>   <name>bufferFeatures</name></member>                 <!-- Format features supported by buffers -->
+        </type>
+        <type category="struct" name="VkImageFormatProperties" returnedonly="true">
+            <member><type>VkExtent3D</type>             <name>maxExtent</name></member>                      <!-- max image dimensions for this resource type -->
+            <member><type>uint32_t</type>               <name>maxMipLevels</name></member>                   <!-- max number of mipmap levels for this resource type -->
+            <member><type>uint32_t</type>               <name>maxArrayLayers</name></member>                 <!-- max array size for this resource type -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>sampleCounts</name></member>                   <!-- supported sample counts for this resource type -->
+            <member><type>VkDeviceSize</type>           <name>maxResourceSize</name></member>                <!-- max size (in bytes) of this resource type -->
+        </type>
+        <type category="struct" name="VkDescriptorBufferInfo">
+            <member><type>VkBuffer</type>               <name>buffer</name></member>                         <!-- Buffer used for this descriptor slot when the descriptor is UNIFORM_BUFFER[_DYNAMIC] or STORAGE_BUFFER[_DYNAMIC]. VK_NULL_HANDLE otherwise. -->
+            <member><type>VkDeviceSize</type>           <name>offset</name></member>                         <!-- Base offset from buffer start in bytes to update in the descriptor set. -->
+            <member><type>VkDeviceSize</type>           <name>range</name></member>                          <!-- Size in bytes of the buffer resource for this descriptor update. -->
+            <validity>
+                <usage>If pname:range is not equal to ename:VK_WHOLE_SIZE, the sum of pname:offset and pname:range must: be less than or equal to the size of pname:buffer</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDescriptorImageInfo">
+            <member noautovalidity="true"><type>VkSampler</type>       <name>sampler</name></member>                        <!-- Sampler to write to the descriptor in case it's a SAMPLER or COMBINED_IMAGE_SAMPLER descriptor. Ignored otherwise. -->
+            <member noautovalidity="true"><type>VkImageView</type>     <name>imageView</name></member>                      <!-- Image view to write to the descriptor in case it's a SAMPLED_IMAGE, STORAGE_IMAGE, COMBINED_IMAGE_SAMPLER, or INPUT_ATTACHMENT descriptor. Ignored otherwise. -->
+            <member noautovalidity="true"><type>VkImageLayout</type>   <name>imageLayout</name></member>                    <!-- Layout the image is expected to be in when accessed using this descriptor (only used if imageView is not VK_NULL_HANDLE). -->
+        </type>
+        <type category="struct" name="VkWriteDescriptorSet">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkDescriptorSet</type>        <name>dstSet</name></member>                        <!-- Destination descriptor set -->
+            <member><type>uint32_t</type>               <name>dstBinding</name></member>                    <!-- Binding within the destination descriptor set to write -->
+            <member><type>uint32_t</type>               <name>dstArrayElement</name></member>               <!-- Array element within the destination binding to write -->
+            <member><type>uint32_t</type>               <name>descriptorCount</name></member>                          <!-- Number of descriptors to write (determines the size of the array pointed by pDescriptors) -->
+            <member><type>VkDescriptorType</type>       <name>descriptorType</name></member>                 <!-- Descriptor type to write (determines which members of the array pointed by pDescriptors are going to be used) -->
+            <member noautovalidity="true" len="descriptorCount">const <type>VkDescriptorImageInfo</type>* <name>pImageInfo</name></member>               <!-- Sampler, image view, and layout for SAMPLER, COMBINED_IMAGE_SAMPLER, {SAMPLED,STORAGE}_IMAGE, and INPUT_ATTACHMENT descriptor types. -->
+            <member noautovalidity="true" len="descriptorCount">const <type>VkDescriptorBufferInfo</type>* <name>pBufferInfo</name></member>             <!-- Raw buffer, size, and offset for {UNIFORM,STORAGE}_BUFFER[_DYNAMIC] descriptor types. -->
+            <member noautovalidity="true" len="descriptorCount">const <type>VkBufferView</type>*    <name>pTexelBufferView</name></member>               <!-- Buffer view to write to the descriptor for {UNIFORM,STORAGE}_TEXEL_BUFFER descriptor types. -->
+            <validity>
+                <usage>pname:dstBinding must: be a valid binding point within pname:dstSet</usage>
+                <usage>pname:descriptorType must: match the type of pname:dstBinding within pname:dstSet</usage>
+                <usage>The sum of pname:dstArrayElement and pname:descriptorCount must: be less than or equal to the number of array elements in the descriptor set binding specified by pname:dstBinding, and all applicable consecutive bindings, as described by &lt;&lt;descriptorsets-updates-consecutive&gt;&gt;</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_SAMPLER, ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE or ename:VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, pname:pImageInfo must: be a pointer to an array of pname:descriptorCount valid sname:VkDescriptorImageInfo structures</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER or ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, pname:pTexelBufferView must: be a pointer to an array of pname:descriptorCount valid sname:VkBufferView handles</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC or ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, pname:pBufferInfo must: be a pointer to an array of pname:descriptorCount valid sname:VkDescriptorBufferInfo structures</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_SAMPLER or ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, and pname:dstSet was not created with a layout that included immutable samplers for pname:dstBinding with pname:descriptorType, the pname:sampler member of any given element of pname:pImageInfo must: be a valid sname:VkSampler object</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE or ename:VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, the pname:imageView and pname:imageLayout members of any given element of pname:pImageInfo must: be a valid sname:VkImageView and elink:VkImageLayout, respectively</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, the pname:offset member of any given element of pname:pBufferInfo must: be a multiple of the value of sname:VkPhysicalDeviceLimits::pname:minUniformBufferOffsetAlignment</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, the pname:offset member of any given element of pname:pBufferInfo must: be a multiple of the value of sname:VkPhysicalDeviceLimits::pname:minStorageBufferOffsetAlignment</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, the pname:buffer member of any given element of pname:pBufferInfo must: have been created with ename:VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT set</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, the pname:buffer member of any given element of pname:pBufferInfo must: have been created with ename:VK_BUFFER_USAGE_STORAGE_BUFFER_BIT set</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER or ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, the pname:range member of any given element of pname:pBufferInfo must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxUniformBufferRange</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER or ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, the pname:range member of any given element of pname:pBufferInfo must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxStorageBufferRange</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, the sname:VkBuffer that pname:pTexelBufferView was created from must: have been created with ename:VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT set</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, the sname:VkBuffer that pname:pTexelBufferView was created from must: have been created with ename:VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT set</usage>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE or ename:VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, the pname:imageView must: have been created with identity swizzle</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkCopyDescriptorSet">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COPY_DESCRIPTOR_SET -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkDescriptorSet</type>        <name>srcSet</name></member>                         <!-- Source descriptor set -->
+            <member><type>uint32_t</type>               <name>srcBinding</name></member>                     <!-- Binding within the source descriptor set to copy from -->
+            <member><type>uint32_t</type>               <name>srcArrayElement</name></member>                <!-- Array element within the source binding to copy from -->
+            <member><type>VkDescriptorSet</type>        <name>dstSet</name></member>                        <!-- Destination descriptor set -->
+            <member><type>uint32_t</type>               <name>dstBinding</name></member>                    <!-- Binding within the destination descriptor set to copy to -->
+            <member><type>uint32_t</type>               <name>dstArrayElement</name></member>               <!-- Array element within the destination binding to copy to -->
+            <member><type>uint32_t</type>               <name>descriptorCount</name></member>                <!-- Number of descriptors to write (determines the size of the array pointed by pDescriptors) -->
+            <validity>
+                <usage>pname:srcBinding must: be a valid binding within pname:srcSet</usage>
+                <usage>The sum of pname:srcArrayElement and pname:descriptorCount must: be less than or equal to the number of array elements in the descriptor set binding specified by pname:srcBinding, and all applicable consecutive bindings, as described by &lt;&lt;descriptorsets-updates-consecutive&gt;&gt;</usage>
+                <usage>pname:dstBinding must: be a valid binding within pname:dstSet</usage>
+                <usage>The sum of pname:dstArrayElement and pname:descriptorCount must: be less than or equal to the number of array elements in the descriptor set binding specified by pname:dstBinding, and all applicable consecutive bindings, as described by &lt;&lt;descriptorsets-updates-consecutive&gt;&gt;</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkBufferCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkBufferCreateFlags</type>    <name>flags</name></member>                          <!-- Buffer creation flags -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Specified in bytes -->
+            <member><type>VkBufferUsageFlags</type>     <name>usage</name></member>                          <!-- Buffer usage flags -->
+            <member><type>VkSharingMode</type>          <name>sharingMode</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>queueFamilyIndexCount</name></member>
+            <member noautovalidity="true" len="queueFamilyIndexCount">const <type>uint32_t</type>*        <name>pQueueFamilyIndices</name></member>
+            <validity>
+                <usage>The value of pname:size must: be greater than `0`</usage>
+                <usage>If pname:sharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:pQueueFamilyIndices must: be a pointer to an array of pname:queueFamilyIndexCount basetype:uint32_t values</usage>
+                <usage>If pname:sharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:queueFamilyIndexCount must: be greater than `1`</usage>
+                <usage>If the &lt;&lt;features-features-sparseBinding,sparse bindings&gt;&gt; feature is not enabled, pname:flags mustnot: contain ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidencyBuffer,sparse buffer residency&gt;&gt; feature is not enabled, pname:flags mustnot: contain ename:VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidencyAliased,sparse aliased residency&gt;&gt; feature is not enabled, pname:flags mustnot: contain ename:VK_BUFFER_CREATE_SPARSE_ALIASED_BIT</usage>
+                <usage>If pname:flags contains ename:VK_BUFFER_CREATE_SPARSE_ALIASED_BIT, it must: also contain at least one of ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT or ename:VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkBufferViewCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkBufferViewCreateFlags</type><name>flags</name></member>                          <!-- Reserved -->
+            <member><type>VkBuffer</type>               <name>buffer</name></member>
+            <member><type>VkFormat</type>               <name>format</name></member>                         <!-- Optionally specifies format of elements -->
+            <member><type>VkDeviceSize</type>           <name>offset</name></member>                         <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>range</name></member>                          <!-- View size specified in bytes -->
+            <validity>
+                <usage>The value of pname:offset must: be a multiple of sname:VkPhysicalDeviceLimits::pname:minTexelBufferOffsetAlignment</usage>
+                <usage>The value of pname:range must: be greater than `0`</usage>
+                <usage>If pname:range is not equal to ename:VK_WHOLE_SIZE, the sum of pname:offset and pname:range must: be less than or equal to the size of pname:buffer</usage>
+                <usage>If pname:range is not equal to ename:VK_WHOLE_SIZE, the value of pname:range must: be a multiple of the element size of pname:format</usage>
+                <usage>The value of pname:range, divided by the size of an element of pname:format, must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxTexelBufferElements</usage>
+                <usage>pname:buffer must: have been created with a pname:usage value containing at least one of ename:VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT or ename:VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT</usage>
+                <usage>If pname:buffer was created with pname:usage containing ename:VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT, pname:format must: be supported for uniform texel buffers, as specified by the ename:VK_FORMAT_FEATURE_UNIFORM_TEXEL_BUFFER_BIT flag in sname:VkFormatProperties::pname:bufferFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:buffer was created with pname:usage containing ename:VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT, pname:format must: be supported for storage texel buffers, as specified by the ename:VK_FORMAT_FEATURE_STORAGE_TEXEL_BUFFER_BIT flag in sname:VkFormatProperties::pname:bufferFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageSubresource">
+            <member><type>VkImageAspectFlags</type>     <name>aspectMask</name></member>
+            <member><type>uint32_t</type>               <name>mipLevel</name></member>
+            <member><type>uint32_t</type>               <name>arrayLayer</name></member>
+            <validity>
+                <usage>pname:mipLevel must: be less than the pname:mipLevels specified in slink:VkImageCreateInfo when the image was created</usage>
+                <usage>pname:arrayLayer must: be less than the pname:arrayLayers specified in slink:VkImageCreateInfo when the image was created</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageSubresourceLayers">
+            <member><type>VkImageAspectFlags</type>     <name>aspectMask</name></member>
+            <member><type>uint32_t</type>               <name>mipLevel</name></member>
+            <member><type>uint32_t</type>               <name>baseArrayLayer</name></member>
+            <member><type>uint32_t</type>               <name>layerCount</name></member>
+            <validity>
+                <usage>If pname:aspectMask contains ename:VK_IMAGE_ASPECT_COLOR_BIT, it mustnot: contain either of ename:VK_IMAGE_ASPECT_DEPTH_BIT or ename:VK_IMAGE_ASPECT_STENCIL_BIT</usage>
+                <usage>pname:aspectMask mustnot: contain ename:VK_IMAGE_ASPECT_METADATA_BIT</usage>
+                <usage>pname:mipLevel must: be less than the pname:mipLevels specified in slink:VkImageCreateInfo when the image was created</usage>
+                <usage>latexmath:[$(baseArrayLayer + layerCount)$] must: be less than or equal to the pname:arrayLayers specified in slink:VkImageCreateInfo when the image was created</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageSubresourceRange">
+            <member><type>VkImageAspectFlags</type>     <name>aspectMask</name></member>
+            <member><type>uint32_t</type>               <name>baseMipLevel</name></member>
+            <member><type>uint32_t</type>               <name>levelCount</name></member>
+            <member><type>uint32_t</type>               <name>baseArrayLayer</name></member>
+            <member><type>uint32_t</type>               <name>layerCount</name></member>
+            <validity>
+                <usage>latexmath:[$(baseMipLevel + levelCount)$] must: be less than or equal to the pname:mipLevels specified in slink:VkImageCreateInfo when the image was created</usage>
+                <usage>latexmath:[$(baseArrayLayer + layerCount)$] must: be less than or equal to the pname:arrayLayers specified in slink:VkImageCreateInfo when the image was created</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkMemoryBarrier">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_MEMORY_BARRIER -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name></member>                  <!-- Memory accesses from the source of the dependency to synchronize -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name></member>                  <!-- Memory accesses from the destination of the dependency to synchronize -->
+        </type>
+        <type category="struct" name="VkBufferMemoryBarrier">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name></member>                  <!-- Memory accesses from the source of the dependency to synchronize -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name></member>                  <!-- Memory accesses from the destination of the dependency to synchronize -->
+            <member><type>uint32_t</type>               <name>srcQueueFamilyIndex</name></member>            <!-- Queue family to transition ownership from -->
+            <member><type>uint32_t</type>               <name>dstQueueFamilyIndex</name></member>           <!-- Queue family to transition ownership to -->
+            <member><type>VkBuffer</type>               <name>buffer</name></member>                         <!-- Buffer to sync -->
+            <member><type>VkDeviceSize</type>           <name>offset</name></member>                         <!-- Offset within the buffer to sync -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Amount of bytes to sync -->
+            <validity>
+                <usage>The value of pname:offset must: be less than the size of pname:buffer</usage>
+                <usage>The sum of pname:offset and pname:size must: be less than or equal to than the size of pname:buffer</usage>
+                <usage>If pname:buffer was created with a sharing mode of ename:VK_SHARING_MODE_CONCURRENT, pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex must: both be VK_QUEUE_FAMILY_IGNORED</usage>
+                <usage>If pname:buffer was created with a sharing mode of ename:VK_SHARING_MODE_EXCLUSIVE, pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex must: either both be VK_QUEUE_FAMILY_IGNORED, or both be a valid queue family (see &lt;&lt;devsandqueues-queueprops&gt;&gt;)</usage>
+                <usage>If pname:buffer was created with a sharing mode of ename:VK_SHARING_MODE_EXCLUSIVE, and pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex are valid queue families, at least one of them must: be the same as the family of the queue that will execute this barrier</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageMemoryBarrier">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name></member>                  <!-- Memory accesses from the source of the dependency to synchronize -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name></member>                  <!-- Memory accesses from the destination of the dependency to synchronize -->
+            <member><type>VkImageLayout</type>          <name>oldLayout</name></member>                      <!-- Current layout of the image -->
+            <member><type>VkImageLayout</type>          <name>newLayout</name></member>                      <!-- New layout to transition the image to -->
+            <member><type>uint32_t</type>               <name>srcQueueFamilyIndex</name></member>            <!-- Queue family to transition ownership from -->
+            <member><type>uint32_t</type>               <name>dstQueueFamilyIndex</name></member>           <!-- Queue family to transition ownership to -->
+            <member><type>VkImage</type>                <name>image</name></member>                          <!-- Image to sync -->
+            <member><type>VkImageSubresourceRange</type> <name>subresourceRange</name></member>              <!-- Subresource range to sync -->
+            <validity>
+                <usage>pname:oldLayout must: be ename:VK_IMAGE_LAYOUT_UNDEFINED, ename:VK_IMAGE_LAYOUT_PREINITIALIZED or the current layout of the image region affected by the barrier</usage>
+                <usage>pname:newLayout mustnot: be ename:VK_IMAGE_LAYOUT_UNDEFINED or ename:VK_IMAGE_LAYOUT_PREINITIALIZED</usage>
+                <usage>If pname:image was created with a sharing mode of ename:VK_SHARING_MODE_CONCURRENT, pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex must: both be VK_QUEUE_FAMILY_IGNORED</usage>
+                <usage>If pname:image was created with a sharing mode of ename:VK_SHARING_MODE_EXCLUSIVE, pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex must: either both be VK_QUEUE_FAMILY_IGNORED, or both be a valid queue family (see &lt;&lt;devsandqueues-queueprops&gt;&gt;)</usage>
+                <usage>If pname:image was created with a sharing mode of ename:VK_SHARING_MODE_EXCLUSIVE, and pname:srcQueueFamilyIndex and pname:dstQueueFamilyIndex are valid queue families, at least one of them must: be the same as the family of the queue that will execute this barrier</usage>
+                <usage>pname:subresourceRange must: be a valid subresource range for the image (see &lt;&lt;resources-image-views&gt;&gt;)</usage>
+                <usage>If pname:image has a depth/stencil format with both depth and stencil components, then pname:aspectMask member of pname:subresourceRange must: include both ename:VK_IMAGE_ASPECT_DEPTH_BIT and ename:VK_IMAGE_ASPECT_STENCIL_BIT</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>VkImageCreateFlags</type>     <name>flags</name></member>                          <!-- Image creation flags -->
+            <member><type>VkImageType</type>            <name>imageType</name></member>
+            <member><type>VkFormat</type>               <name>format</name></member>
+            <member><type>VkExtent3D</type>             <name>extent</name></member>
+            <member><type>uint32_t</type>               <name>mipLevels</name></member>
+            <member><type>uint32_t</type>               <name>arrayLayers</name></member>
+            <member><type>VkSampleCountFlagBits</type>  <name>samples</name></member>
+            <member><type>VkImageTiling</type>          <name>tiling</name></member>
+            <member><type>VkImageUsageFlags</type>      <name>usage</name></member>                          <!-- Image usage flags -->
+            <member><type>VkSharingMode</type>          <name>sharingMode</name></member>                    <!-- Cross-queue-family sharing mode -->
+            <member optional="true"><type>uint32_t</type>               <name>queueFamilyIndexCount</name></member>          <!-- Number of queue families to share across -->
+            <member noautovalidity="true" len="queueFamilyIndexCount">const <type>uint32_t</type>*        <name>pQueueFamilyIndices</name></member>            <!-- Array of queue family indices to share across -->
+            <member><type>VkImageLayout</type>          <name>initialLayout</name></member>                  <!-- Initial image layout for all subresources -->
+            <validity>
+                <usage>If pname:sharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:pQueueFamilyIndices must: be a pointer to an array of pname:queueFamilyIndexCount basetype:uint32_t values</usage>
+                <usage>If pname:sharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:queueFamilyIndexCount must: be greater than `1`</usage>
+                <usage>pname:format mustnot: be ename:VK_FORMAT_UNDEFINED</usage>
+                <usage>The values of the pname:width, pname:height and pname:depth members of pname:extent must: all be greater than `0`</usage>
+                <usage>The value of pname:mipLevels must: be greater than `0`</usage>
+                <usage>The value of pname:arrayLayers must: be greater than `0`</usage>
+                <usage>If pname:imageType is ename:VK_IMAGE_TYPE_1D, the value of pname:extent.width must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxImageDimension1D, or the value of sname:VkImageFormatProperties::pname:maxExtent.width (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure) - whichever is higher</usage>
+                <usage>If pname:imageType is ename:VK_IMAGE_TYPE_2D and pname:flags does not contain ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT, the value of pname:extent.width and pname:extent.height must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxImageDimension2D, or the value of sname:VkImageFormatProperties::pname:maxExtent.width/height (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure) - whichever is higher</usage>
+                <usage>If pname:imageType is ename:VK_IMAGE_TYPE_2D and pname:flags contains ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT, the value of pname:extent.width and pname:extent.height must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxImageDimensionCube, or the value of sname:VkImageFormatProperties::pname:maxExtent.width/height (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure) - whichever is higher</usage>
+                <usage>If pname:imageType is ename:VK_IMAGE_TYPE_2D and pname:flags contains ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT, the value of pname:extent.width and pname:extent.height must: be equal</usage>
+                <usage>If pname:imageType is ename:VK_IMAGE_TYPE_3D, the value of pname:extent.width, pname:extent.height and pname:extent.depth must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxImageDimension3D, or the value of sname:VkImageFormatProperties::pname:maxExtent.width/height/depth (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure) - whichever is higher</usage>
+                <usage>The value of pname:mipLevels must: be less than or equal to or equal to the value of latexmath:[$\lfloor\log_2(\max(\mathit{extent.width}, \mathit{extent.height}, \mathit{extent.depth}))\rfloor + 1$]</usage>
+                <usage>If the values of any of pname:extent.width, pname:extent.height or pname:extent.depth are greater than the values of the equivalently named members of sname:VkPhysicalDeviceLimits::pname:maxImageDimension3D, pname:mipLevels must: be less than or equal to the value of sname:VkImageFormatProperties::pname:maxMipLevels (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure)</usage>
+                <usage>If the values of any of pname:extent.width, pname:extent.height or pname:extent.depth are greater than the values of the equivalently named members of sname:VkPhysicalDeviceLimits::pname:maxImageDimension3D, (pname:extent.width * pname:extent.height * pname:extent.depth) must: be less than or equal to the value of sname:VkImageFormatProperties::pname:maxResourceSize (as returned by flink:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure)</usage>
+                <usage>The value of pname:arrayLayers must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxImageArrayLayers, or the value of sname:VkImageFormatProperties::pname:maxArrayLayers (as returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure) - whichever is higher</usage>
+                <usage>The value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:sampleCounts returned by flink:vkGetPhysicalDeviceProperties, or the value of sname:VkImageFormatProperties::pname:maxExtent.sampleCounts returned by fname:vkGetPhysicalDeviceImageFormatProperties with values of pname:format, pname:type, pname:tiling, pname:usage and pname:flags equal to those in this structure</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, ename:VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT or ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT, the value of pname:extent.width must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxFramebufferWidth</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, ename:VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT or ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT, the value of pname:extent.height must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxFramebufferHeight</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxFramebufferColorSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, and pname:format includes a depth aspect, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxFramebufferDepthSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, and pname:format includes a stencil aspect, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxFramebufferStencilSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_SAMPLED_BIT, and pname:format includes a color aspect, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxSampledImageColorSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_SAMPLED_BIT, and pname:format includes a depth aspect, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxSampledImageDepthSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_SAMPLED_BIT, and pname:format is an integer format, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxSampledImageIntegerSamples</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_STORAGE_BIT, the value of pname:samples must: be a bit value that is set in the value of sname:VkPhysicalDeviceLimits::pname:maxStorageImageSamples</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionETC2,ETC2 texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK, ename:VK_FORMAT_EAC_R11_UNORM_BLOCK, ename:VK_FORMAT_EAC_R11_SNORM_BLOCK, ename:VK_FORMAT_EAC_R11G11_UNORM_BLOCK, or ename:VK_FORMAT_EAC_R11G11_SNORM_BLOCK</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionASTC_LDR,ASTC LDR texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_ASTC_4x4_UNORM_BLOCK, ename:VK_FORMAT_ASTC_4x4_SRGB_BLOCK, ename:VK_FORMAT_ASTC_5x4_UNORM_BLOCK, ename:VK_FORMAT_ASTC_5x4_SRGB_BLOCK, ename:VK_FORMAT_ASTC_5x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_5x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_6x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_6x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_6x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_6x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x8_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x8_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x8_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x8_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x10_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x10_SRGB_BLOCK, ename:VK_FORMAT_ASTC_12x10_UNORM_BLOCK, ename:VK_FORMAT_ASTC_12x10_SRGB_BLOCK, ename:VK_FORMAT_ASTC_12x12_UNORM_BLOCK, or ename:VK_FORMAT_ASTC_12x12_SRGB_BLOCK</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionBC,BC texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_BC1_RGB_UNORM_BLOCK, ename:VK_FORMAT_BC1_RGB_SRGB_BLOCK, ename:VK_FORMAT_BC1_RGBA_UNORM_BLOCK, ename:VK_FORMAT_BC1_RGBA_SRGB_BLOCK, ename:VK_FORMAT_BC2_UNORM_BLOCK, ename:VK_FORMAT_BC2_SRGB_BLOCK, ename:VK_FORMAT_BC3_UNORM_BLOCK, ename:VK_FORMAT_BC3_SRGB_BLOCK, ename:VK_FORMAT_BC4_UNORM_BLOCK, ename:VK_FORMAT_BC4_SNORM_BLOCK, ename:VK_FORMAT_BC5_UNORM_BLOCK, ename:VK_FORMAT_BC5_SNORM_BLOCK, ename:VK_FORMAT_BC6H_UFLOAT_BLOCK, ename:VK_FORMAT_BC6H_SFLOAT_BLOCK, ename:VK_FORMAT_BC7_UNORM_BLOCK, or ename:VK_FORMAT_BC7_SRGB_BLOCK</usage>
+                <usage>If the &lt;&lt;features-features-shaderStorageImageMultisample,multisampled storage images&gt;&gt; feature is not enabled, and pname:usage contains ename:VK_IMAGE_USAGE_STORAGE_BIT, pname:samples must: be ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseBinding,sparse bindings&gt;&gt; feature is not enabled, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_BINDING_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidencyImage2D,sparse residency for 2D images&gt;&gt; feature is not enabled, and pname:imageType is VK_IMAGE_TYPE_2D, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidencyImage3D,sparse residency for 3D images&gt;&gt; feature is not enabled, and pname:imageType is VK_IMAGE_TYPE_3D, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidency2Samples,sparse residency for images with 2 samples&gt;&gt; feature is not enabled, pname:imageType is VK_IMAGE_TYPE_2D, and pname:samples is ename:VK_SAMPLE_COUNT_2_BIT, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidency4Samples,sparse residency for images with 4 samples&gt;&gt; feature is not enabled, pname:imageType is VK_IMAGE_TYPE_2D, and pname:samples is ename:VK_SAMPLE_COUNT_4_BIT, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidency8Samples,sparse residency for images with 8 samples&gt;&gt; feature is not enabled, pname:imageType is VK_IMAGE_TYPE_2D, and pname:samples is ename:VK_SAMPLE_COUNT_8_BIT, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-sparseResidency16Samples,sparse residency for images with 16 samples&gt;&gt; feature is not enabled, pname:imageType is VK_IMAGE_TYPE_2D, and pname:samples is ename:VK_SAMPLE_COUNT_16_BIT, pname:flags mustnot: contain ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_LINEAR, and the value of sname:VkFormatProperties::pname:linearTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_SAMPLED_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_LINEAR, and the value of sname:VkFormatProperties::pname:linearTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_STORAGE_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_LINEAR, and the value of sname:VkFormatProperties::pname:linearTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_LINEAR, and the value of sname:VkFormatProperties::pname:linearTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_OPTIMAL, and the value of sname:VkFormatProperties::pname:optimalTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_SAMPLED_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_OPTIMAL, and the value of sname:VkFormatProperties::pname:optimalTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_STORAGE_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_OPTIMAL, and the value of sname:VkFormatProperties::pname:optimalTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT</usage>
+                <usage>If the value of pname:tiling is ename:VK_IMAGE_TILING_OPTIMAL, and the value of sname:VkFormatProperties::pname:optimalTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties with the same value of pname:format) does not include VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT, pname:usage mustnot: contain ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT</usage>
+                <usage>If pname:flags contains ename:VK_IMAGE_CREATE_SPARSE_ALIASED_BIT, it must: also contain at least one of ename:VK_IMAGE_CREATE_SPARSE_BINDING_BIT or ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSubresourceLayout">
+            <member><type>VkDeviceSize</type>           <name>offset</name></member>                         <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>rowPitch</name></member>                       <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>arrayPitch</name></member>                     <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>depthPitch</name></member>                     <!-- Specified in bytes -->
+        </type>
+        <type category="struct" name="VkImageViewCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkImageViewCreateFlags</type> <name>flags</name></member>                          <!-- Reserved -->
+            <member><type>VkImage</type>                <name>image</name></member>
+            <member><type>VkImageViewType</type>        <name>viewType</name></member>
+            <member><type>VkFormat</type>               <name>format</name></member>
+            <member><type>VkComponentMapping</type>     <name>components</name></member>
+            <member><type>VkImageSubresourceRange</type> <name>subresourceRange</name></member>
+            <validity>
+                <usage>If pname:image was not created with ename:VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT then pname:viewType mustnot: be ename:VK_IMAGE_VIEW_TYPE_CUBE or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY</usage>
+                <usage>If the &lt;&lt;features-features-imageCubeArray,image cubemap arrays&gt;&gt; feature is not enabled, pname:viewType mustnot: be ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionETC2,ETC2 texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK, ename:VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK, ename:VK_FORMAT_EAC_R11_UNORM_BLOCK, ename:VK_FORMAT_EAC_R11_SNORM_BLOCK, ename:VK_FORMAT_EAC_R11G11_UNORM_BLOCK, or ename:VK_FORMAT_EAC_R11G11_SNORM_BLOCK</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionASTC_LDR,ASTC LDR texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_ASTC_4x4_UNORM_BLOCK, ename:VK_FORMAT_ASTC_4x4_SRGB_BLOCK, ename:VK_FORMAT_ASTC_5x4_UNORM_BLOCK, ename:VK_FORMAT_ASTC_5x4_SRGB_BLOCK, ename:VK_FORMAT_ASTC_5x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_5x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_6x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_6x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_6x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_6x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_8x8_UNORM_BLOCK, ename:VK_FORMAT_ASTC_8x8_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x5_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x5_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x6_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x6_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x8_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x8_SRGB_BLOCK, ename:VK_FORMAT_ASTC_10x10_UNORM_BLOCK, ename:VK_FORMAT_ASTC_10x10_SRGB_BLOCK, ename:VK_FORMAT_ASTC_12x10_UNORM_BLOCK, ename:VK_FORMAT_ASTC_12x10_SRGB_BLOCK, ename:VK_FORMAT_ASTC_12x12_UNORM_BLOCK, or ename:VK_FORMAT_ASTC_12x12_SRGB_BLOCK</usage>
+                <usage>If the &lt;&lt;features-features-textureCompressionBC,BC texture compression&gt;&gt; feature is not enabled, pname:format mustnot: be ename:VK_FORMAT_BC1_RGB_UNORM_BLOCK, ename:VK_FORMAT_BC1_RGB_SRGB_BLOCK, ename:VK_FORMAT_BC1_RGBA_UNORM_BLOCK, ename:VK_FORMAT_BC1_RGBA_SRGB_BLOCK, ename:VK_FORMAT_BC2_UNORM_BLOCK, ename:VK_FORMAT_BC2_SRGB_BLOCK, ename:VK_FORMAT_BC3_UNORM_BLOCK, ename:VK_FORMAT_BC3_SRGB_BLOCK, ename:VK_FORMAT_BC4_UNORM_BLOCK, ename:VK_FORMAT_BC4_SNORM_BLOCK, ename:VK_FORMAT_BC5_UNORM_BLOCK, ename:VK_FORMAT_BC5_SNORM_BLOCK, ename:VK_FORMAT_BC6H_UFLOAT_BLOCK, ename:VK_FORMAT_BC6H_SFLOAT_BLOCK, ename:VK_FORMAT_BC7_UNORM_BLOCK, or ename:VK_FORMAT_BC7_SRGB_BLOCK</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_LINEAR and pname:usage containing ename:VK_IMAGE_USAGE_SAMPLED_BIT, pname:format must: be supported for sampled images, as specified by the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_LINEAR and pname:usage containing ename:VK_IMAGE_USAGE_STORAGE_BIT, pname:format must: be supported for storage images, as specified by the ename:VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_LINEAR and pname:usage containing ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, pname:format must: be supported for color attachments, as specified by the ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_LINEAR and pname:usage containing ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, pname:format must: be supported for depth/stencil attachments, as specified by the ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures (as returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_OPTIMAL and pname:usage containing ename:VK_IMAGE_USAGE_SAMPLED_BIT, pname:format must: be supported for sampled images, as specified by the ename:VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT flag in sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_OPTIMAL and pname:usage containing ename:VK_IMAGE_USAGE_STORAGE_BIT, pname:format must: be supported for storage images, as specified by the ename:VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT flag in sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_OPTIMAL and pname:usage containing ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, pname:format must: be supported for color attachments, as specified by the ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:image was created with ename:VK_IMAGE_TILING_OPTIMAL and pname:usage containing ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, pname:format must: be supported for depth/stencil attachments, as specified by the ename:VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>pname:subresourceRange must: be a valid subresource range for pname:image (see &lt;&lt;resources-image-views&gt;&gt;)</usage>
+                <usage>If pname:image was created with the ename:VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT flag, pname:format must: be compatible with the pname:format used to create pname:image, as defined in &lt;&lt;features-formats-compatibility-classes,Format Compatibility Classes&gt;&gt;</usage>
+                <usage>If pname:image was not created with the ename:VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT flag, pname:format must: be identical to the pname:format used to create pname:image</usage>
+                <usage>pname:subResourceRange and pname:viewType must: be compatible with the image, as described in the &lt;&lt;resources-image-views-compatibility,table below&gt;&gt;</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkBufferCopy">
+            <member><type>VkDeviceSize</type>           <name>srcOffset</name></member>                      <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>dstOffset</name></member>                     <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Specified in bytes -->
+        </type>
+        <type category="struct" name="VkSparseMemoryBind">
+            <member><type>VkDeviceSize</type>           <name>resourceOffset</name></member>                 <!-- Specified in bytes -->
+            <member><type>VkDeviceSize</type>           <name>size</name></member>                           <!-- Specified in bytes -->
+            <member optional="true"><type>VkDeviceMemory</type>         <name>memory</name></member>
+            <member><type>VkDeviceSize</type>           <name>memoryOffset</name></member>                   <!-- Specified in bytes -->
+            <member optional="true"><type>VkSparseMemoryBindFlags</type><name>flags</name></member>                          <!-- Reserved for future -->
+            <validity>
+                <usage>If pname:memory is not sname:VK_NULL_HANDLE, pname:memory and pname:memoryOffset must: match the memory requirements of the resource, as described in section &lt;&lt;resources-association&gt;&gt;</usage>
+                <usage>If pname:memory is not sname:VK_NULL_HANDLE, pname:memory mustnot: have been created with a memory type that reports ename:VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT bit set</usage>
+                <usage>pname:resourceOffset must: be less than the size of the resource</usage>
+                <usage>The sum of pname:resourceOffset and pname:size must: be less than or equal to the size of the resource</usage>
+                <usage>pname:memoryOffset must: be less than the size of pname:memory</usage>
+                <usage>The sum of pname:memoryOffset and pname:size must: be less than or equal to the size of pname:memory</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSparseImageMemoryBind">
+            <member><type>VkImageSubresource</type>     <name>subresource</name></member>
+            <member><type>VkOffset3D</type>             <name>offset</name></member>
+            <member><type>VkExtent3D</type>             <name>extent</name></member>
+            <member optional="true"><type>VkDeviceMemory</type>         <name>memory</name></member>
+            <member><type>VkDeviceSize</type>           <name>memoryOffset</name></member>                   <!-- Specified in bytes -->
+            <member optional="true"><type>VkSparseMemoryBindFlags</type><name>flags</name></member>                          <!-- Reserved for future -->
+            <validity>
+                <usage>If the &lt;&lt;features-features-sparseResidencyAliased,sparse aliased residency&gt;&gt; feature is not enabled, and if any other resources are bound to ranges of pname:memory, the range of pname:memory being bound mustnot: overlap with those bound ranges</usage>
+                <usage>pname:memory and pname:memoryOffset must: match the memory requirements of the calling command's pname:image, as described in section &lt;&lt;resources-association&gt;&gt;</usage>
+                <usage>pname:subresource must: be a valid subresource for pname:image (see &lt;&lt;resources-image-views&gt;&gt;)</usage>
+                <usage>pname:offset.x must: be a multiple of the block width (sname:VkSparseImageFormatProperties::pname:imageGranularity.width) of the image</usage>
+                <usage>pname:extent.width must: either be a multiple of the block width of the image, or else pname:extent.width + pname:offset.x must: equal the width of the image subresource</usage>
+                <usage>pname:offset.y must: be a multiple of the block height (sname:VkSparseImageFormatProperties::pname:imageGranularity.height) of the image</usage>
+                <usage>pname:extent.height must: either be a multiple of the block height of the image, or else pname:extent.height + pname:offset.y must: equal the height of the image subresource</usage>
+                <usage>pname:offset.z must: be a multiple of the block depth (sname:VkSparseImageFormatProperties::pname:imageGranularity.depth) of the image</usage>
+                <usage>pname:extent.depth must: either be a multiple of the block depth of the image, or else pname:extent.depth + pname:offset.z must: equal the depth of the image subresource</usage>
+            </validity>
+    </type>
+        <type category="struct" name="VkSparseBufferMemoryBindInfo">
+            <member><type>VkBuffer</type> <name>buffer</name></member>
+            <member><type>uint32_t</type>               <name>bindCount</name></member>
+            <member len="bindCount">const <type>VkSparseMemoryBind</type>* <name>pBinds</name></member>
+        </type>
+        <type category="struct" name="VkSparseImageOpaqueMemoryBindInfo">
+            <member><type>VkImage</type> <name>image</name></member>
+            <member><type>uint32_t</type>               <name>bindCount</name></member>
+            <member len="bindCount">const <type>VkSparseMemoryBind</type>* <name>pBinds</name></member>
+            <validity>
+                <usage>For any given element of pname:pBinds, if the pname:flags member of that element contains ename:VK_SPARSE_MEMORY_BIND_METADATA_BIT, the 'binding range' defined must: be within the mip tail region of the metadata aspect of pname:image</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSparseImageMemoryBindInfo">
+            <member><type>VkImage</type> <name>image</name></member>
+            <member><type>uint32_t</type>               <name>bindCount</name></member>
+            <member len="bindCount">const <type>VkSparseImageMemoryBind</type>* <name>pBinds</name></member>
+        </type>
+        <type category="struct" name="VkBindSparseInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_BIND_SPARSE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure. -->
+            <member optional="true"><type>uint32_t</type>               <name>waitSemaphoreCount</name></member>
+            <member len="waitSemaphoreCount">const <type>VkSemaphore</type>*     <name>pWaitSemaphores</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>bufferBindCount</name></member>
+            <member len="bufferBindCount">const <type>VkSparseBufferMemoryBindInfo</type>* <name>pBufferBinds</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>imageOpaqueBindCount</name></member>
+            <member len="imageOpaqueBindCount">const <type>VkSparseImageOpaqueMemoryBindInfo</type>* <name>pImageOpaqueBinds</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>imageBindCount</name></member>
+            <member len="imageBindCount">const <type>VkSparseImageMemoryBindInfo</type>* <name>pImageBinds</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>signalSemaphoreCount</name></member>
+            <member len="signalSemaphoreCount">const <type>VkSemaphore</type>*     <name>pSignalSemaphores</name></member>
+        </type>
+        <type category="struct" name="VkImageCopy">
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>srcOffset</name></member>                      <!-- Specified in pixels for both compressed and uncompressed images -->
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>dstOffset</name></member>                     <!-- Specified in pixels for both compressed and uncompressed images -->
+            <member><type>VkExtent3D</type>             <name>extent</name></member>                         <!-- Specified in pixels for both compressed and uncompressed images -->
+            <validity>
+                <usage>The pname:aspectMask member of pname:srcSubresource and pname:dstSubresource must: match</usage>
+                <usage>The pname:layerCount member of pname:srcSubresource and pname:dstSubresource must: match</usage>
+                <usage>If either of the calling command's pname:srcImage or pname:dstImage parameters are of elink:VkImageType ename:VK_IMAGE_TYPE_3D, the pname:baseArrayLayer and pname:layerCount members of both pname:srcSubresource and pname:dstSubresource must: be `0` and `1`, respectively</usage>
+                <usage>The pname:aspectMask member of pname:srcSubresource must: specify aspects present in the calling command's pname:srcImage</usage>
+                <usage>The pname:aspectMask member of pname:dstSubresource must: specify aspects present in the calling command's pname:dstImage</usage>
+                <usage>pname:srcOffset.x and (pname:extent.width + pname:srcOffset.x) must: both be greater than or equal to `0` and less than or equal to the source image subresource width</usage>
+                <usage>pname:srcOffset.y and (pname:extent.height + pname:srcOffset.y) must: both be greater than or equal to `0` and less than or equal to the source image subresource height</usage>
+                <usage>pname:srcOffset.z and (pname:extent.depth + pname:srcOffset.z) must: both be greater than or equal to `0` and less than or equal to the source image subresource depth</usage>
+                <usage>pname:dstOffset.x and (pname:extent.width + pname:dstOffset.x) must: both be greater than or equal to `0` and less than or equal to the destination image subresource width</usage>
+                <usage>pname:dstOffset.y and (pname:extent.height + pname:dstOffset.y) must: both be greater than or equal to `0` and less than or equal to the destination image subresource height</usage>
+                <usage>pname:dstOffset.z and (pname:extent.depth + pname:dstOffset.z) must: both be greater than or equal to `0` and less than or equal to the destination image subresource depth</usage>
+                <usage>If the calling command's pname:srcImage is a compressed format image:</usage>
+                <usage>* all members of pname:srcOffset must: be a multiple of the block size in the relevant dimensions</usage>
+                <usage>* pname:extent.width must: be a multiple of the block width or (pname:extent.width + pname:srcOffset.x) must: equal the source image subresource width</usage>
+                <usage>* pname:extent.height must: be a multiple of the block height or (pname:extent.height + pname:srcOffset.y) must: equal the source image subresource height</usage>
+                <usage>* pname:extent.depth must: be a multiple of the block depth or (pname:extent.depth + pname:srcOffset.z) must: equal the source image subresource depth</usage>
+                <usage>If the calling command's pname:dstImage is a compressed format image:</usage>
+                <usage>* all members of pname:dstOffset must: be a multiple of the block size in the relevant dimensions</usage>
+                <usage>* pname:extent.width must: be a multiple of the block width or (pname:extent.width + pname:dstOffset.x) must: equal the destination image subresource width</usage>
+                <usage>* pname:extent.height must: be a multiple of the block height or (pname:extent.height + pname:dstOffset.y) must: equal the destination image subresource height</usage>
+                <usage>* pname:extent.depth must: be a multiple of the block depth or (pname:extent.depth + pname:dstOffset.z) must: equal the destination image subresource depth</usage>
+                <usage>pname:srcOffset, pname:dstOffset, and pname:extent must: respect the image transfer granularity requirements of the queue family that it will be submitted against, as described in &lt;&lt;execution-physical-device-enumeration,Physical Device Enumeration&gt;&gt;</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageBlit">
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>srcOffsets[2]</name></member>                      <!-- Specified in pixels for both compressed and uncompressed images -->
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>dstOffsets[2]</name></member>                     <!-- Specified in pixels for both compressed and uncompressed images -->
+            <validity>
+                <usage>The pname:aspectMask member of pname:srcSubresource and pname:dstSubresource must: match</usage>
+                <usage>The pname:layerCount member of pname:srcSubresource and pname:dstSubresource must: match</usage>
+                <usage>If either of the calling command's pname:srcImage or pname:dstImage parameters are of elink:VkImageType ename:VK_IMAGE_TYPE_3D, the pname:baseArrayLayer and pname:layerCount members of both pname:srcSubresource and pname:dstSubresource must: be `0` and `1`, respectively</usage>
+                <usage>The pname:aspectMask member of pname:srcSubresource must: specify aspects present in the calling command's pname:srcImage</usage>
+                <usage>The pname:aspectMask member of pname:dstSubresource must: specify aspects present in the calling command's pname:dstImage</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkBufferImageCopy">
+            <member><type>VkDeviceSize</type>           <name>bufferOffset</name></member>                   <!-- Specified in bytes -->
+            <member><type>uint32_t</type>               <name>bufferRowLength</name></member>                <!-- Specified in texels -->
+            <member><type>uint32_t</type>               <name>bufferImageHeight</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>imageSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>imageOffset</name></member>                    <!-- Specified in pixels for both compressed and uncompressed images -->
+            <member><type>VkExtent3D</type>             <name>imageExtent</name></member>                    <!-- Specified in pixels for both compressed and uncompressed images -->
+            <validity>
+                <usage>pname:bufferOffset must: be a multiple of the calling command's sname:VkImage parameter's texel size</usage>
+                <usage>pname:bufferOffset must: be a multiple of `4`</usage>
+                <usage>pname:bufferRowLength must: be `0`, or greater than or equal to the pname:width member of pname:imageExtent</usage>
+                <usage>pname:bufferImageHeight must: be `0`, or greater than or equal to the pname:height member of pname:imageExtent</usage>
+                <usage>pname:imageOffset.x and (pname:imageExtent.width + pname:imageOffset.x) must: both be greater than or equal to `0` and less than or equal to the image subresource width</usage>
+                <usage>pname:imageOffset.y and (imageExtent.height + pname:imageOffset.y) must: both be greater than or equal to `0` and less than or equal to the image subresource height</usage>
+                <usage>pname:imageOffset.z and (imageExtent.depth + pname:imageOffset.z) must: both be greater than or equal to `0` and less than or equal to the image subresource depth</usage>
+                <usage>If the calling command's sname:VkImage parameter is a compressed format image:</usage>
+                <usage>* pname:bufferRowLength, pname:bufferImageHeight and all members of pname:imageOffset must: be a multiple of the block size in the relevant dimensions</usage>
+                <usage>* pname:bufferOffset must: be a multiple of the block size in bytes</usage>
+                <usage>* pname:imageExtent.width must: be a multiple of the block width or (pname:imageExtent.width + pname:imageOffset.x) must: equal the image subresource width</usage>
+                <usage>* pname:imageExtent.height must: be a multiple of the block height or (pname:imageExtent.height + pname:imageOffset.y) must: equal the image subresource height</usage>
+                <usage>* pname:imageExtent.depth must: be a multiple of the block depth or (pname:imageExtent.depth + pname:imageOffset.z) must: equal the image subresource depth</usage>
+                <usage>pname:bufferOffset, pname:bufferRowLength, pname:bufferImageHeight and all members of pname:imageOffset and pname:imageExtent must: respect the image transfer granularity requirements of the queue family that it will be submitted against, as described in &lt;&lt;execution-physical-device-enumeration,Physical Device Enumeration&gt;&gt;</usage>
+                <usage>The pname:aspectMask member of pname:srcSubresource must: specify aspects present in the calling command's sname:VkImage parameter</usage>
+                <usage>The pname:aspectMask member of pname:pSubresource must: only have a single bit set</usage>
+                <usage>If the calling command's sname:VkImage parameter is of elink:VkImageType ename:VK_IMAGE_TYPE_3D, the pname:baseArrayLayer and pname:layerCount members of both pname:srcSubresource and pname:dstSubresource must: be `0` and `1`, respectively</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkImageResolve">
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>srcOffset</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type>             <name>dstOffset</name></member>
+            <member><type>VkExtent3D</type>             <name>extent</name></member>
+            <validity>
+                <usage>The pname:aspectMask member of pname:srcSubresource and pname:dstSubresource must: only contain ename:VK_IMAGE_ASPECT_COLOR_BIT</usage>
+                <usage>The pname:layerCount member of pname:srcSubresource and pname:dstSubresource must: match</usage>
+                <usage>If either of the calling command's pname:srcImage or pname:dstImage parameters are of elink:VkImageType ename:VK_IMAGE_TYPE_3D, the pname:baseArrayLayer and pname:layerCount members of both pname:srcSubresource and pname:dstSubresource must: be `0` and `1`, respectively</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkShaderModuleCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkShaderModuleCreateFlags</type> <name>flags</name></member>                       <!-- Reserved -->
+            <member><type>size_t</type>                 <name>codeSize</name></member>                       <!-- Specified in bytes -->
+            <member len="codeSize/4">const <type>uint32_t</type>*            <name>pCode</name></member>                          <!-- Binary code of size codeSize -->
+            <validity>
+                <usage>pname:codeSize must: be greater than 0</usage>
+                <usage>pname:codeSize must: be a multiple of 4</usage>
+                <usage>pname:pCode must: point to valid SPIR-V code, formatted and packed as described by https://www.khronos.org/registry/spir-v/specs/1.0/SPIRV.html[the SPIR-V Specification v1.0]</usage>
+                <usage>pname:pCode must: adhere to the validation rules described by the &lt;&lt;spirvenv-module-validation, Validation Rules within a Module&gt;&gt; section of the &lt;&lt;spirvenv-capabilities,SPIR-V Environment&gt;&gt; appendix</usage>
+                <usage>pname:pCode must: declare the code:Shader capability</usage>
+                <usage>pname:pCode mustnot: declare any capability that is not supported by the API, as described by the &lt;&lt;spirvenv-module-validation, Capabilities&gt;&gt; section of the &lt;&lt;spirvenv-capabilities,SPIR-V Environment&gt;&gt; appendix</usage>
+                <usage>If pname:pCode declares any of the capabilities that are listed as not required by the implementation, the relevant feature must: be enabled, as listed in the &lt;&lt;spirvenv-capabilities-table,SPIR-V Environment&gt;&gt; appendix</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDescriptorSetLayoutBinding">
+            <member><type>uint32_t</type>               <name>binding</name></member>                        <!-- Binding number for this entry -->
+            <member><type>VkDescriptorType</type>       <name>descriptorType</name></member>                 <!-- Type of the descriptors in this binding -->
+            <member optional="true"><type>uint32_t</type> <name>descriptorCount</name></member>              <!-- Number of descriptors in this binding -->
+            <member noautovalidity="true"><type>VkShaderStageFlags</type>     <name>stageFlags</name></member>                     <!-- Shader stages this binding is visible to -->
+            <member noautovalidity="true" optional="true" len="descriptorCount">const <type>VkSampler</type>*       <name>pImmutableSamplers</name></member>             <!-- Immutable samplers (used if descriptor type is SAMPLER or COMBINED_IMAGE_SAMPLER, is either NULL or contains count number of elements) -->
+            <validity>
+                <usage>If pname:descriptorType is ename:VK_DESCRIPTOR_TYPE_SAMPLER or ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, and pname:descriptorCount is not `0` and pname:pImmutableSamplers is not `NULL`, pname:pImmutableSamplers must: be a pointer to an array of pname:descriptorCount valid sname:VkSampler handles</usage>
+                <usage>If pname:descriptorCount is not `0`, pname:stageFlags must: be a valid combination of elink:VkShaderStageFlagBits values</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDescriptorSetLayoutCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDescriptorSetLayoutCreateFlags</type>    <name>flags</name></member>             <!-- Reserved -->
+            <member optional="true"><type>uint32_t</type>               <name>bindingCount</name></member>                   <!-- Number of bindings in the descriptor set layout -->
+            <member len="bindingCount">const <type>VkDescriptorSetLayoutBinding</type>* <name>pBindings</name></member>       <!-- Array of descriptor set layout bindings -->
+        </type>
+        <type category="struct" name="VkDescriptorPoolSize">
+            <member><type>VkDescriptorType</type>       <name>type</name></member>
+            <member><type>uint32_t</type>               <name>descriptorCount</name></member>
+            <validity>
+                <usage>The value of pname:descriptorCount must: be greater than `0`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDescriptorPoolCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDescriptorPoolCreateFlags</type>  <name>flags</name></member>
+            <member><type>uint32_t</type>               <name>maxSets</name></member>
+            <member><type>uint32_t</type>               <name>poolSizeCount</name></member>
+            <member len="poolSizeCount">const <type>VkDescriptorPoolSize</type>* <name>pPoolSizes</name></member>
+            <validity>
+                <usage>The value of pname:maxSets must: be greater than `0`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDescriptorSetAllocateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkDescriptorPool</type> <name>descriptorPool</name></member>
+            <member><type>uint32_t</type>               <name>descriptorSetCount</name></member>
+            <member len="descriptorSetCount">const <type>VkDescriptorSetLayout</type>* <name>pSetLayouts</name></member>
+            <validity>
+                <usage>The value of pname:descriptorSetCount mustnot: be greater than the number of sets that are currently available for allocation in pname:descriptorPool</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSpecializationMapEntry">
+            <member><type>uint32_t</type>               <name>constantID</name></member>                     <!-- The SpecConstant ID specified in the BIL -->
+            <member><type>uint32_t</type>               <name>offset</name></member>                         <!-- Offset of the value in the data block -->
+            <member><type>size_t</type>                 <name>size</name></member>                           <!-- Size in bytes of the SpecConstant -->
+        </type>
+        <type category="struct" name="VkSpecializationInfo">
+            <member optional="true"><type>uint32_t</type>               <name>mapEntryCount</name></member>                  <!-- Number of entries in the map -->
+            <member len="mapEntryCount">const <type>VkSpecializationMapEntry</type>* <name>pMapEntries</name></member>                  <!-- Array of map entries -->
+            <member optional="true"><type>size_t</type>                 <name>dataSize</name></member>                       <!-- Size in bytes of pData -->
+            <member len="dataSize">const <type>void</type>*            <name>pData</name></member>                          <!-- Pointer to SpecConstant data -->
+            <validity>
+                <usage>The pname:offset member of any given element of pname:pMapEntries must: be less than pname:dataSize</usage>
+                <usage>The sum of the pname:offset and pname:size members of any given element of pname:pMapEntries must: be less than or equal to pname:dataSize</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineShaderStageCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineShaderStageCreateFlags</type>    <name>flags</name></member>             <!-- Reserved -->
+            <member><type>VkShaderStageFlagBits</type>  <name>stage</name></member>                          <!-- Shader stage -->
+            <member><type>VkShaderModule</type>         <name>module</name></member>                         <!-- Module containing entry point -->
+            <member len="null-terminated">const <type>char</type>*            <name>pName</name></member>                          <!-- Null-terminated entry point name -->
+            <member optional="true">const <type>VkSpecializationInfo</type>* <name>pSpecializationInfo</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:stage mustnot: be pname:VK_SHADER_STAGE_GEOMETRY_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:stage mustnot: be pname:VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT or pname:VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT</usage>
+                <usage>pname:stage mustnot: be ename:VK_SHADER_STAGE_ALL_GRAPHICS, or ename:VK_SHADER_STAGE_ALL</usage>
+                <usage>pname:pName must: be the name of an code:OpEntryPoint in pname:module with an execution model that matches pname:stage</usage>
+                <usage>If the identified entry point includes any variable in its interface that is declared with the code:ClipDistance code:BuiltIn decoration, that variable mustnot: have an array size greater than sname:VkPhysicalDeviceLimits::pname:maxClipDistances</usage>
+                <usage>If the identified entry point includes any variable in its interface that is declared with the code:CullDistance code:BuiltIn decoration, that variable mustnot: have an array size greater than sname:VkPhysicalDeviceLimits::pname:maxCullDistances</usage>
+                <usage>If the identified entry point includes any variables in its interface that are declared with the code:ClipDistance or code:CullDistance code:BuiltIn decoration, those variables mustnot: have array sizes which sum to more than sname:VkPhysicalDeviceLimits::pname:maxCombinedClipAndCullDistances</usage>
+                <usage>If the identified entry point includes any variable in its interface that is declared with the code:SampleMask code:BuiltIn decoration, that variable mustnot: have an array size greater than sname:VkPhysicalDeviceLimits::pname:maxSampleMaskWords</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_VERTEX_BIT, the identified entry point mustnot: include any input variable in its interface that is decorated with code:CullDistance</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT or ename:VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT, and the identified entry point has an code:OpExecutionMode instruction that specifies a patch size with code:OutputVertices, the patch size must: be greater than `0` and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxTessellationPatchSize</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_GEOMETRY_BIT, the identified entry point must: have an code:OpExecutionMode instruction that specifies a maximum output vertex count that is greater than `0` and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxGeometryOutputVertices</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_GEOMETRY_BIT, the identified entry point must: have an code:OpExecutionMode instruction that specifies an invocation count that is greater than `0` and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxGeometryShaderInvocations</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_GEOMETRY_BIT, and the identified entry point writes to code:Layer for any primitive, it must: write the same value to code:Layer for all vertices of a given primitive</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_GEOMETRY_BIT, and the identified entry point writes to code:ViewportIndex for any primitive, it must: write the same value to code:ViewportIndex for all vertices of a given primitive</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_FRAGMENT_BIT, the identified entry point mustnot: include any output variables in its interface decorated with code:CullDistance</usage>
+                <usage>If pname:stage is ename:VK_SHADER_STAGE_FRAGMENT_BIT, and the identified entry point writes to code:FragDepth in any execution path, it must: write to code:FragDepth in all execution paths</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkComputePipelineCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name></member>                          <!-- Pipeline creation flags -->
+            <member><type>VkPipelineShaderStageCreateInfo</type> <name>stage</name></member>
+            <member><type>VkPipelineLayout</type>       <name>layout</name></member>                         <!-- Interface layout of the pipeline -->
+            <member noautovalidity="true" optional="true"><type>VkPipeline</type>      <name>basePipelineHandle</name></member>             <!-- If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is nonzero, it specifies the handle of the base pipeline this is a derivative of -->
+            <member><type>int32_t</type>                <name>basePipelineIndex</name></member>              <!-- If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is not -1, it specifies an index into pCreateInfos of the base pipeline this is a derivative of -->
+            <validity>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineIndex is not `-1`, pname:basePipelineHandle must: be sname:VK_NULL_HANDLE</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineIndex is not `-1`, it must: be a valid index into the calling command's pname:pCreateInfos parameter</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, pname:basePipelineIndex must: be `-1`</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, pname:basePipelineHandle must: be a valid sname:VkPipeline handle</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, it must: be a valid handle to a compute sname:VkPipeline</usage>
+                <usage>The pname:stage member of pname:stage must: be ename:VK_SHADER_STAGE_COMPUTE_BIT</usage>
+                <usage>The shader code for the entry point identified by pname:stage and the rest of the state identified by this structure must: adhere to the pipeline linking rules described in the &lt;&lt;interfaces,Shader Interfaces&gt;&gt; chapter</usage>
+                <usage>pname:layout must: be &lt;&lt;descriptorsets-pipelinelayout-consistency,consistent&gt;&gt; with all shaders specified in pname:pStages</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkVertexInputBindingDescription">
+            <member><type>uint32_t</type>               <name>binding</name></member>                        <!-- Vertex buffer binding id -->
+            <member><type>uint32_t</type>               <name>stride</name></member>                         <!-- Distance between vertices in bytes (0 = no advancement) -->
+            <member><type>VkVertexInputRate</type>      <name>inputRate</name></member>                      <!-- The rate at which the vertex data is consumed -->
+            <validity>
+                <usage>pname:binding must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindings</usage>
+                <usage>pname:stride must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindingStride</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkVertexInputAttributeDescription">
+            <member><type>uint32_t</type>               <name>location</name></member>                       <!-- location of the shader vertex attrib -->
+            <member><type>uint32_t</type>               <name>binding</name></member>                        <!-- Vertex buffer binding id -->
+            <member><type>VkFormat</type>               <name>format</name></member>                         <!-- format of source data -->
+            <member><type>uint32_t</type>               <name>offset</name></member>                         <!-- Offset of first element in bytes from base of vertex -->
+            <validity>
+                <usage>pname:binding must: be less than sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindings</usage>
+                <usage>pname:offset must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputAttributeOffset</usage>
+                <usage>pname:format must: be allowed as a vertex buffer format, as specified by the ename:VK_FORMAT_FEATURE_VERTEX_BUFFER_BIT flag in sname:VkFormatProperties::pname:bufferFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineVertexInputStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Should be VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineVertexInputStateCreateFlags</type>    <name>flags</name></member>        <!-- Reserved -->
+            <member optional="true"><type>uint32_t</type>               <name>vertexBindingDescriptionCount</name></member>  <!-- number of bindings -->
+            <member len="vertexBindingDescriptionCount">const <type>VkVertexInputBindingDescription</type>* <name>pVertexBindingDescriptions</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>vertexAttributeDescriptionCount</name></member> <!-- number of attributes -->
+            <member len="vertexAttributeDescriptionCount">const <type>VkVertexInputAttributeDescription</type>* <name>pVertexAttributeDescriptions</name></member>
+            <validity>
+                <usage>pname:vertexBindingDescriptionCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindings</usage>
+                <usage>pname:vertexAttributeDescriptionCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputAttributes</usage>
+                <usage>For every value of pname:binding specified by any given element of pname:pVertexAttributeDescriptions, a sname:VkVertexInputBindingDescription must: exist in pname:pVertexBindingDescriptions with the same value of pname:binding</usage>
+                <usage>All elements of pname:pVertexBindingDescriptions must: describe distinct binding numbers</usage>
+                <usage>All elements of pname:pVertexAttributeDescriptions must: describe distinct attribute locations</usage>
+
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineInputAssemblyStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_IINPUT_ASSEMBLY_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineInputAssemblyStateCreateFlags</type>    <name>flags</name></member>      <!-- Reserved -->
+            <member><type>VkPrimitiveTopology</type>    <name>topology</name></member>
+            <member><type>VkBool32</type>               <name>primitiveRestartEnable</name></member>
+            <validity>
+                <usage>If pname:topology is ename:VK_PRIMITIVE_TOPOLOGY_POINT_LIST, ename:VK_PRIMITIVE_TOPOLOGY_LINE_LIST, ename:VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, ename:VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY, ename:VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY or ename:VK_PRIMITIVE_TOPOLOGY_PATCH_LIST, the value of pname:primitiveRestartEnable must: be ename:VK_FALSE</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:topology mustnot: be any of ename:VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY, ename:VK_PRIMITIVE_TOPOLOGY_LINE_STRIP_WITH_ADJACENCY, ename:VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY or ename:VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP_WITH_ADJACENCY</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:topology mustnot: be VK_PRIMITIVE_TOPOLOGY_PATCH_LIST</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineTessellationStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_TESSELLATION_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineTessellationStateCreateFlags</type>    <name>flags</name></member>        <!-- Reserved -->
+            <member><type>uint32_t</type>               <name>patchControlPoints</name></member>
+            <validity>
+                <usage>pname:patchControlPoints must: be greater than zero and less than or equal to sname:VkPhysicalDeviceLimits::pname:maxTessellationPatchSize</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineViewportStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineViewportStateCreateFlags</type>    <name>flags</name></member>           <!-- Reserved -->
+            <member><type>uint32_t</type>               <name>viewportCount</name></member>
+            <member noautovalidity="true" optional="true" len="viewportCount">const <type>VkViewport</type>*      <name>pViewports</name></member>
+            <member><type>uint32_t</type>               <name>scissorCount</name></member>
+            <member noautovalidity="true" optional="true" len="scissorCount">const <type>VkRect2D</type>*        <name>pScissors</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-multiViewport,multiple viewports&gt;&gt; feature is not enabled, pname:viewportCount must: be `1`</usage>
+                <usage>If the &lt;&lt;features-features-multiViewport,multiple viewports&gt;&gt; feature is not enabled, pname:scissorCount must: be `1`</usage>
+                <usage>pname:viewportCount must: be between `1` and sname:VkPhysicalDeviceLimits::pname:maxViewports, inclusive</usage>
+                <usage>pname:scissorCount must: be between `1` and sname:VkPhysicalDeviceLimits::pname:maxViewports, inclusive</usage>
+                <usage>The values of pname:scissorCount and pname:viewportCount must: be identical</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineRasterizationStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineRasterizationStateCreateFlags</type>    <name>flags</name></member>             <!-- Reserved -->
+            <member><type>VkBool32</type>               <name>depthClampEnable</name></member>
+            <member><type>VkBool32</type>               <name>rasterizerDiscardEnable</name></member>
+            <member><type>VkPolygonMode</type>          <name>polygonMode</name></member>                       <!-- optional (GL45) -->
+            <member optional="true"><type>VkCullModeFlags</type>        <name>cullMode</name></member>
+            <member><type>VkFrontFace</type>            <name>frontFace</name></member>
+            <member><type>VkBool32</type>               <name>depthBiasEnable</name></member>
+            <member><type>float</type>                  <name>depthBiasConstantFactor</name></member>
+            <member><type>float</type>                  <name>depthBiasClamp</name></member>
+            <member><type>float</type>                  <name>depthBiasSlopeFactor</name></member>
+            <member><type>float</type>                  <name>lineWidth</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-depthClamp,depth clamping&gt;&gt; feature is not enabled, the value of pname:depthClampEnable must: be ename:VK_FALSE</usage>
+                <usage>If the &lt;&lt;features-features-fillModeNonSolid,non-solid fill modes&gt;&gt; feature is not enabled, the value of pname:fillMode must: be ename:VK_POLYGON_MODE_FILL</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineMultisampleStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineMultisampleStateCreateFlags</type>    <name>flags</name></member>        <!-- Reserved -->
+            <member><type>VkSampleCountFlagBits</type>  <name>rasterizationSamples</name></member>           <!-- Number of samples used for rasterization -->
+            <member><type>VkBool32</type>               <name>sampleShadingEnable</name></member>            <!-- optional (GL45) -->
+            <member><type>float</type>                  <name>minSampleShading</name></member>               <!-- optional (GL45) -->
+            <member optional="true" len="latexmath:[$\lceil{\mathit{rasterizationSamples} \over 32}\rceil$]">const <type>VkSampleMask</type>*    <name>pSampleMask</name></member>                    <!-- Array of sampleMask words, containing ceil(rasterSamples/32) words -->
+            <member><type>VkBool32</type>               <name>alphaToCoverageEnable</name></member>
+            <member><type>VkBool32</type>               <name>alphaToOneEnable</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-sampleRateShading,sample rate shading&gt;&gt; feature is not enabled, pname:sampleShadingEnable must: be ename:VK_FALSE</usage>
+                <usage>If the &lt;&lt;features-features-alphaToOne,alpha to one&gt;&gt; feature is not enabled, pname:alphaToOneEnable must: be ename:VK_FALSE</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineColorBlendAttachmentState">
+            <member><type>VkBool32</type>               <name>blendEnable</name></member>
+            <member><type>VkBlendFactor</type>          <name>srcColorBlendFactor</name></member>
+            <member><type>VkBlendFactor</type>          <name>dstColorBlendFactor</name></member>
+            <member><type>VkBlendOp</type>              <name>colorBlendOp</name></member>
+            <member><type>VkBlendFactor</type>          <name>srcAlphaBlendFactor</name></member>
+            <member><type>VkBlendFactor</type>          <name>dstAlphaBlendFactor</name></member>
+            <member><type>VkBlendOp</type>              <name>alphaBlendOp</name></member>
+            <member optional="true"><type>VkColorComponentFlags</type>  <name>colorWriteMask</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-dualSrcBlend,dual source blending&gt;&gt; feature is not enabled, pname:srcColorBlendFactor mustnot: be pname:VK_BLEND_SRC1_COLOR, pname:VK_BLEND_ONE_MINUS_SRC1_COLOR, pname:VK_BLEND_SRC1_ALPHA, or pname:VK_BLEND_ONE_MINUS_SRC1_ALPHA</usage>
+                <usage>If the &lt;&lt;features-features-dualSrcBlend,dual source blending&gt;&gt; feature is not enabled, pname:dstColorBlendFactor mustnot: be pname:VK_BLEND_SRC1_COLOR, pname:VK_BLEND_ONE_MINUS_SRC1_COLOR, pname:VK_BLEND_SRC1_ALPHA, or pname:VK_BLEND_ONE_MINUS_SRC1_ALPHA</usage>
+                <usage>If the &lt;&lt;features-features-dualSrcBlend,dual source blending&gt;&gt; feature is not enabled, pname:srcAlphaBlendFactor mustnot: be pname:VK_BLEND_SRC1_COLOR, pname:VK_BLEND_ONE_MINUS_SRC1_COLOR, pname:VK_BLEND_SRC1_ALPHA, or pname:VK_BLEND_ONE_MINUS_SRC1_ALPHA</usage>
+                <usage>If the &lt;&lt;features-features-dualSrcBlend,dual source blending&gt;&gt; feature is not enabled, pname:dstAlphaBlendFactor mustnot: be pname:VK_BLEND_SRC1_COLOR, pname:VK_BLEND_ONE_MINUS_SRC1_COLOR, pname:VK_BLEND_SRC1_ALPHA, or pname:VK_BLEND_ONE_MINUS_SRC1_ALPHA</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineColorBlendStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineColorBlendStateCreateFlags</type>    <name>flags</name></member>         <!-- Reserved -->
+            <member><type>VkBool32</type>               <name>logicOpEnable</name></member>
+            <member noautovalidity="true"><type>VkLogicOp</type>              <name>logicOp</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>attachmentCount</name></member>                <!-- # of pAttachments -->
+            <member len="attachmentCount">const <type>VkPipelineColorBlendAttachmentState</type>* <name>pAttachments</name></member>
+            <member><type>float</type>                  <name>blendConstants</name>[4]</member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-independentBlend,independent blending&gt;&gt; feature is not enabled, all elements of pname:pAttachments must: be identical</usage>
+                <usage>If the &lt;&lt;features-features-logicOp,logic operations&gt;&gt; feature is not enabled, pname:logicOpEnable must: be ename:VK_FALSE</usage>
+                <usage>If pname:logicOpEnable is ename:VK_TRUE, pname:logicOp must: be a valid elink:VkLogicOp value</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineDynamicStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineDynamicStateCreateFlags</type>    <name>flags</name></member>            <!-- Reserved -->
+            <member><type>uint32_t</type>               <name>dynamicStateCount</name></member>
+            <member len="dynamicStateCount">const <type>VkDynamicState</type>*  <name>pDynamicStates</name></member>
+        </type>
+        <type category="struct" name="VkStencilOpState">
+            <member><type>VkStencilOp</type>            <name>failOp</name></member>
+            <member><type>VkStencilOp</type>            <name>passOp</name></member>
+            <member><type>VkStencilOp</type>            <name>depthFailOp</name></member>
+            <member><type>VkCompareOp</type>            <name>compareOp</name></member>
+            <member><type>uint32_t</type>               <name>compareMask</name></member>
+            <member><type>uint32_t</type>               <name>writeMask</name></member>
+            <member><type>uint32_t</type>               <name>reference</name></member>
+        </type>
+        <type category="struct" name="VkPipelineDepthStencilStateCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineDepthStencilStateCreateFlags</type>    <name>flags</name></member>       <!-- Reserved -->
+            <member><type>VkBool32</type>               <name>depthTestEnable</name></member>
+            <member><type>VkBool32</type>               <name>depthWriteEnable</name></member>
+            <member><type>VkCompareOp</type>            <name>depthCompareOp</name></member>
+            <member><type>VkBool32</type>               <name>depthBoundsTestEnable</name></member>          <!-- optional (depth_bounds_test) -->
+            <member><type>VkBool32</type>               <name>stencilTestEnable</name></member>
+            <member><type>VkStencilOpState</type>       <name>front</name></member>
+            <member><type>VkStencilOpState</type>       <name>back</name></member>
+            <member><type>float</type>                  <name>minDepthBounds</name></member>
+            <member><type>float</type>                  <name>maxDepthBounds</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-depthBounds,depth bounds testing&gt;&gt; feature is not enabled, the value of pname:depthBoundsTestEnable must: be ename:VK_FALSE</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkGraphicsPipelineCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name></member>                          <!-- Pipeline creation flags -->
+            <member><type>uint32_t</type>               <name>stageCount</name></member>
+            <member len="stageCount">const <type>VkPipelineShaderStageCreateInfo</type>* <name>pStages</name></member>        <!-- One entry for each active shader stage -->
+            <member>const <type>VkPipelineVertexInputStateCreateInfo</type>* <name>pVertexInputState</name></member>
+            <member>const <type>VkPipelineInputAssemblyStateCreateInfo</type>* <name>pInputAssemblyState</name></member>
+            <member noautovalidity="true" optional="true">const <type>VkPipelineTessellationStateCreateInfo</type>* <name>pTessellationState</name></member>
+            <member noautovalidity="true" optional="true">const <type>VkPipelineViewportStateCreateInfo</type>* <name>pViewportState</name></member>
+            <member>const <type>VkPipelineRasterizationStateCreateInfo</type>* <name>pRasterizationState</name></member>
+            <member noautovalidity="true" optional="true">const <type>VkPipelineMultisampleStateCreateInfo</type>* <name>pMultisampleState</name></member>
+            <member noautovalidity="true" optional="true">const <type>VkPipelineDepthStencilStateCreateInfo</type>* <name>pDepthStencilState</name></member>
+            <member noautovalidity="true" optional="true">const <type>VkPipelineColorBlendStateCreateInfo</type>* <name>pColorBlendState</name></member>
+            <member optional="true">const <type>VkPipelineDynamicStateCreateInfo</type>* <name>pDynamicState</name></member>
+            <member><type>VkPipelineLayout</type>       <name>layout</name></member>                         <!-- Interface layout of the pipeline -->
+            <member><type>VkRenderPass</type>           <name>renderPass</name></member>
+            <member><type>uint32_t</type>               <name>subpass</name></member>
+            <member noautovalidity="true" optional="true"><type>VkPipeline</type>      <name>basePipelineHandle</name></member>             <!-- If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is nonzero, it specifies the handle of the base pipeline this is a derivative of -->
+            <member><type>int32_t</type>                <name>basePipelineIndex</name></member>              <!-- If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is not -1, it specifies an index into pCreateInfos of the base pipeline this is a derivative of -->
+            <validity>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineIndex is not `-1`, pname:basePipelineHandle must: be sname:VK_NULL_HANDLE</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineIndex is not `-1`, it must: be a valid index into the calling command's pname:pCreateInfos parameter</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, pname:basePipelineIndex must: be `-1`</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, pname:basePipelineHandle must: be a valid sname:VkPipeline handle</usage>
+                <usage>If pname:flags contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and pname:basePipelineHandle is not sname:VK_NULL_HANDLE, it must: be a valid handle to a graphics sname:VkPipeline</usage>
+                <usage>pname:stageCount must: be greater than or equal to `1`</usage>
+                <usage>The pname:stage member of each element of pname:pStages must: be unique</usage>
+                <usage>The pname:stage member of one element of pname:pStages must: be ename:VK_SHADER_STAGE_VERTEX_BIT</usage>
+                <usage>The pname:stage member of any given element of pname:pStages mustnot: be ename:VK_SHADER_STAGE_COMPUTE_BIT</usage>
+                <usage>If pname:pStages includes a tessellation control shader stage, it must: include a tessellation evaluation shader stage</usage>
+                <usage>If pname:pStages includes a tessellation evaluation shader stage, it must: include a tessellation control shader stage</usage>
+                <usage>If pname:pStages includes a tessellation control shader stage and a tessellation evaluation shader stage, pname:pTessellationState mustnot: be `NULL`</usage>
+                <usage>If pname:pStages includes both a tessellation control shader stage and a tessellation evaluation shader stage, the shader code of at least one must: contain an code:OpExecutionMode instruction that specifies the type of subdivision in the pipeline</usage>
+                <usage>If pname:pStages includes both a tessellation control shader stage and a tessellation evaluation shader stage, and the shader code of both contain an code:OpExecutionMode instruction that specifies the type of subdivision in the pipeline, they must: both specify the same subdivision mode</usage>
+                <usage>If pname:pStages includes both a tessellation control shader stage and a tessellation evaluation shader stage, the shader code of at least one must: contain an code:OpExecutionMode instruction that specifies the output patch size in the pipeline</usage>
+                <usage>If pname:pStages includes both a tessellation control shader stage and a tessellation evaluation shader stage, and the shader code of both contain an code:OpExecutionMode instruction that specifies the out patch size in the pipeline, they must: both specify the same patch size</usage>
+                <usage>If pname:pStages includes tessellation shader stages, the pname:topology member of pname:pInputAssembly must: be ename:VK_PRIMITIVE_TOPOLOGY_PATCH_LIST</usage>
+                <usage>If pname:pStages includes a geometry shader stage, and doesn't include any tessellation shader stages, its shader code must: contain an code:OpExecutionMode instruction that specifies an input primitive type that is &lt;&lt;shaders-geometry-execution, compatible&gt;&gt; with the primitive topology specified in pname:pInputAssembly</usage>
+                <usage>If pname:pStages includes a geometry shader stage, and also includes tessellation shader stages, its shader code must: contain an code:OpExecutionMode instruction that specifies an input primitive type that is &lt;&lt;shaders-geometry-execution, compatible&gt;&gt; with the primitive topology that is output by the tessellation stages</usage>
+                <usage>If pname:pStages includes a fragment shader stage and a geometry shader stage, and the fragment shader code reads from an input variable that is decorated with code:PrimitiveID, then the geometry shader code must: write to a matching output variable, decorated with code:PrimitiveID, in all execution paths</usage>
+                <usage>If pname:pStages includes a fragment shader stage, its shader code mustnot: read from any input attachment that is defined as ename:VK_ATTACHMENT_UNUSED in pname:subpass</usage>
+                <usage>The shader code for the entry points identified by pname:pStages, and the rest of the state identified by this structure must: adhere to the pipeline linking rules described in the &lt;&lt;interfaces,Shader Interfaces&gt;&gt; chapter</usage>
+                <usage>If pname:subpass uses a depth/stencil attachment in pname:renderpass that has a layout of ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL in the sname:VkAttachmentReference defined by pname:subpass, and pname:pDepthStencilState is not `NULL`, the pname:depthWriteEnable member of pname:pDepthStencilState must: be ename:VK_FALSE</usage>
+                <usage>If pname:subpass uses a depth/stencil attachment in pname:renderpass that has a layout of ename:VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL in the sname:VkAttachmentReference defined by pname:subpass, and pname:pDepthStencilState is not `NULL`, the value of the pname:failOp, pname:passOp and pname:depthFailOp members of each of the pname:front and pname:back members of pname:pDepthStencilState must: be ename:VK_STENCIL_OP_KEEP</usage>
+                <usage>If pname:pColorBlendState is not `NULL`, the value of the pname:blendEnable member of each element of the pname:pAttachment member of pname:pColorBlendState must: be ename:VK_FALSE if the pname:format of the attachment referred to in pname:subpass of pname:renderPass does not support color blend operations, as specified by the ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BLEND_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures or sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:pColorBlendState is not `NULL`, The pname:attachmentCount member of pname:pColorBlendState must: be equal to the value of pname:colorAttachmentCount used to create pname:subpass</usage>
+                <usage>If no element of the pname:pDynamicStates member of pname:pDynamicState is ename:VK_DYNAMIC_STATE_VIEWPORT, the pname:pViewports member of pname:pViewportState must: be a pointer to an array of pname:pViewportState->viewportCount sname:VkViewport structures</usage>
+                <usage>If no element of the pname:pDynamicStates member of pname:pDynamicState is ename:VK_DYNAMIC_STATE_SCISSOR, the pname:pScissors member of pname:pViewportState must: be a pointer to an array of pname:pViewportState->scissorCount sname:VkRect2D structures</usage>
+                <usage>If the wide lines feature is not enabled, and no element of the pname:pDynamicStates member of pname:pDynamicState is ename:VK_DYNAMIC_STATE_LINE_WIDTH, the pname:lineWidth member of pname:pRasterizationState must: be `1.0`</usage>
+                <usage>If the pname:rasterizerDiscardEnable member of pname:pRasterizationState is ename:VK_FALSE, pname:pViewportState must: be a pointer to a valid sname:VkPipelineViewportStateCreateInfo structure</usage>
+                <usage>If the pname:rasterizerDiscardEnable member of pname:pRasterizationState is ename:VK_FALSE, pname:pMultisampleState must: be a pointer to a valid sname:VkPipelineMultisampleStateCreateInfo structure</usage>
+                <usage>If the pname:rasterizerDiscardEnable member of pname:pRasterizationState is ename:VK_FALSE, and pname:subpass uses a depth/stencil attachment, pname:pDepthStencilState must: be a pointer to a valid sname:VkPipelineDepthStencilStateCreateInfo structure</usage>
+                <usage>If the pname:rasterizerDiscardEnable member of pname:pRasterizationState is ename:VK_FALSE, and pname:subpass uses color attachments, pname:pColorBlendState must: be a pointer to a valid sname:VkPipelineColorBlendStateCreateInfo structure</usage>
+                <usage>If the depth bias clamping feature is not enabled, no element of the pname:pDynamicStates member of pname:pDynamicState is ename:VK_DYNAMIC_STATE_DEPTH_BIAS, and the pname:depthBiasEnable member of pname:pDepthStencil is ename:VK_TRUE, the pname:depthBiasClamp member of pname:pDepthStencil must: be `0.0`</usage>
+                <usage>If no element of the pname:pDynamicStates member of pname:pDynamicState is ename:VK_DYNAMIC_STATE_DEPTH_BOUNDS, and the pname:depthBoundsTestEnable member of pname:pDepthStencil is ename:VK_TRUE, the value of the pname:minDepthBounds and pname:maxDepthBounds members of pname:pDepthStencil must: be between `0.0` and `1.0`, inclusive</usage>
+                <usage>pname:layout must: be &lt;&lt;descriptorsets-pipelinelayout-consistency,consistent&gt;&gt; with all shaders specified in pname:pStages</usage>
+                <usage>If pname:subpass uses color and/or depth/stencil attachments, then the pname:rasterizationSamples member of pname:pMultisampleState must: be the same as the sample count for those subpass attachments</usage>
+                <usage>If pname:subpass does not use any color and/or depth/stencil attachments, then the pname:rasterizationSamples member of pname:pMultisampleState must: follow the rules for a &lt;&lt;renderpass-noattachments, zero-attachment subpass&gt;&gt;</usage>
+                <usage>pname:subpass must: be a valid subpass within pname:renderpass</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineCacheCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineCacheCreateFlags</type>    <name>flags</name></member>                   <!-- Reserved -->
+            <member optional="true"><type>size_t</type>                 <name>initialDataSize</name></member>                <!-- Size of initial data to populate cache, in bytes -->
+            <member len="initialDataSize">const <type>void</type>*            <name>pInitialData</name></member>                    <!-- Initial data to populate cache -->
+            <validity>
+                <usage>If pname:initialDataSize is not `0`, it must: be equal to the size of pname:pInitialData, as returned by fname:vkGetPipelineCacheData when pname:pInitialData was originally retrieved</usage>
+                <usage>If pname:initialDataSize is not `0`, pname:pInitialData must: have been retrieved from a previous call to fname:vkGetPipelineCacheData</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPushConstantRange">
+            <member><type>VkShaderStageFlags</type>     <name>stageFlags</name></member>                     <!-- Which stages use the range -->
+            <member><type>uint32_t</type>               <name>offset</name></member>                         <!-- Start of the range, in bytes -->
+            <member><type>uint32_t</type>               <name>size</name></member>                           <!-- Size of the range, in bytes -->
+            <validity>
+                <usage>The sum of pname:offset and pname:size must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPushConstantsSize</usage>
+                <usage>The value of pname:size must: be greater than `0`</usage>
+                <usage>The value of pname:size must: be a multiple of `4`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPipelineLayoutCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkPipelineLayoutCreateFlags</type>    <name>flags</name></member>                  <!-- Reserved -->
+            <member optional="true"><type>uint32_t</type>               <name>setLayoutCount</name></member>                 <!-- Number of descriptor sets interfaced by the pipeline -->
+            <member len="setLayoutCount">const <type>VkDescriptorSetLayout</type>* <name>pSetLayouts</name></member>              <!-- Array of setCount number of descriptor set layout objects defining the layout of the -->
+            <member optional="true"><type>uint32_t</type>               <name>pushConstantRangeCount</name></member>         <!-- Number of push-constant ranges used by the pipeline -->
+            <member len="pushConstantRangeCount">const <type>VkPushConstantRange</type>* <name>pPushConstantRanges</name></member>        <!-- Array of pushConstantRangeCount number of ranges used by various shader stages -->
+            <validity>
+                <usage>pname:setLayoutCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxBoundDescriptorSets</usage>
+                <usage>The total number of descriptors of the type ename:VK_DESCRIPTOR_TYPE_SAMPLER and ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER accessible to any given shader stage across all elements of pname:pSetLayouts must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPerStageDescriptorSamplers</usage>
+                <usage>The total number of descriptors of the type ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER and ename:VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC accessible to any given shader stage across all elements of pname:pSetLayouts must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPerStageDescriptorUniformBuffers</usage>
+                <usage>The total number of descriptors of the type ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER and ename:VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC accessible to any given shader stage across all elements of pname:pSetLayouts must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPerStageDescriptorStorageBuffers</usage>
+                <usage>The total number of descriptors of the type ename:VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, ename:VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, and ename:VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER accessible to any given shader stage across all elements of pname:pSetLayouts must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPerStageDescriptorSampledImages</usage>
+                <usage>The total number of descriptors of the type ename:VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, and ename:VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER accessible to any given shader stage across all elements of pname:pSetLayouts must: be less than or equal to the value of sname:VkPhysicalDeviceLimits::pname:maxPerStageDescriptorStorageImages</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSamplerCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkSamplerCreateFlags</type>   <name>flags</name></member>                          <!-- Reserved -->
+            <member><type>VkFilter</type>               <name>magFilter</name></member>                      <!-- Filter mode for magnification -->
+            <member><type>VkFilter</type>               <name>minFilter</name></member>                      <!-- Filter mode for minifiation -->
+            <member><type>VkSamplerMipmapMode</type>    <name>mipmapMode</name></member>                     <!-- Mipmap selection mode -->
+            <member><type>VkSamplerAddressMode</type>   <name>addressModeU</name></member>
+            <member><type>VkSamplerAddressMode</type>   <name>addressModeV</name></member>
+            <member><type>VkSamplerAddressMode</type>   <name>addressModeW</name></member>
+            <member><type>float</type>                  <name>mipLodBias</name></member>
+            <member><type>VkBool32</type>               <name>anisotropyEnable</name></member>
+            <member><type>float</type>                  <name>maxAnisotropy</name></member>
+            <member><type>VkBool32</type>               <name>compareEnable</name></member>
+            <member noautovalidity="true"><type>VkCompareOp</type>            <name>compareOp</name></member>
+            <member><type>float</type>                  <name>minLod</name></member>
+            <member><type>float</type>                  <name>maxLod</name></member>
+            <member noautovalidity="true"><type>VkBorderColor</type>          <name>borderColor</name></member>
+            <member><type>VkBool32</type>               <name>unnormalizedCoordinates</name></member>
+            <validity>
+                <usage>The absolute value of pname:mipLodBias must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxSamplerLodBias</usage>
+                <usage>If the &lt;&lt;features-features-samplerAnisotropy,anisotropic sampling&gt;&gt; feature is not enabled, pname:anisotropyEnable must: be ename:VK_FALSE</usage>
+                <usage>If pname:anisotropyEnable is ename:VK_TRUE, the value of pname:maxAnisotropy must: be between `1.0` and sname:VkPhysicalDeviceLimits::pname:maxSamplerAnisotropy, inclusive</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:minFilter and pname:magFilter must: be equal</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:mipmapMode must: be ename:VK_SAMPLER_MIPMAP_MODE_NEAREST</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:minLod and pname:maxLod must: be zero</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:addressModeU and pname:addressModeV must: each be either ename:VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE or ename:VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:anisotropyEnable must: be ename:VK_FALSE</usage>
+                <usage>If pname:unnormalizedCoordinates is ename:VK_TRUE, pname:compareEnable must: be ename:VK_FALSE</usage>
+                <usage>If any of pname:addressModeU, pname:addressModeV or pname:addressModeW are ename:VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER, pname:borderColor must: be a valid elink:VkBorderColor value</usage>
+                <usage>If pname:compareEnable is ename:VK_TRUE, pname:compareOp must: be a valid elink:VkCompareOp value</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkCommandPoolCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkCommandPoolCreateFlags</type>   <name>flags</name></member>                          <!-- Command pool creation flags -->
+            <member><type>uint32_t</type>               <name>queueFamilyIndex</name></member>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be the index of a queue family available in the calling command's pname:device parameter</usage>
+            </validity>
+         </type>
+         <type category="struct" name="VkCommandBufferAllocateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkCommandPool</type>  <name>commandPool</name></member>
+            <member><type>VkCommandBufferLevel</type>       <name>level</name></member>
+            <member><type>uint32_t</type>               <name>commandBufferCount</name></member>
+        </type>
+        <type category="struct" name="VkCommandBufferInheritanceInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true" noautovalidity="true"><type>VkRenderPass</type>    <name>renderPass</name></member>                     <!-- Render pass for secondary command buffers -->
+            <member><type>uint32_t</type>               <name>subpass</name></member>
+            <member optional="true" noautovalidity="true"><type>VkFramebuffer</type>   <name>framebuffer</name></member>                    <!-- Framebuffer for secondary command buffers -->
+            <member><type>VkBool32</type>               <name>occlusionQueryEnable</name></member>           <!-- Whether this secondary command buffer may be executed during an occlusion query -->
+            <member optional="true" noautovalidity="true"><type>VkQueryControlFlags</type>    <name>queryFlags</name></member>                     <!-- Query flags used by this secondary command buffer, if executed during an occlusion query -->
+            <member optional="true" noautovalidity="true"><type>VkQueryPipelineStatisticFlags</type> <name>pipelineStatistics</name></member>      <!-- Pipeline statistics that may be counted for this secondary command buffer -->
+            <validity>
+                <usage>If the &lt;&lt;features-features-inheritedQueries,inherited queries&gt;&gt; feature is not enabled, pname:occlusionQueryEnable must: be ename:VK_FALSE</usage>
+                <usage>If the &lt;&lt;features-features-inheritedQueries,inherited queries&gt;&gt; feature is enabled, pname:queryFlags must: be a valid combination of elink:VkQueryControlFlagBits values</usage>
+                <usage>If the &lt;&lt;features-features-pipelineStatisticsQuery,pipeline statistics queries&gt;&gt; feature is not enabled, pname:pipelineStatistics must: be code:0</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkCommandBufferBeginInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkCommandBufferUsageFlags</type>  <name>flags</name></member>                          <!-- Command buffer usage flags -->
+            <member optional="true" noautovalidity="true">const <type>VkCommandBufferInheritanceInfo</type>*       <name>pInheritanceInfo</name></member>                          <!-- Pointer to inheritance info for secondary command buffers -->
+            <validity>
+                <usage>If pname:flags contains ename:VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT, the pname:renderPass member of pname:pInheritanceInfo must: be a valid sname:VkRenderPass</usage>
+                <usage>If pname:flags contains ename:VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT, the pname:subpass member of pname:pInheritanceInfo must: be a valid subpass index within the pname:renderPass member of pname:pInheritanceInfo</usage>
+                <usage>If pname:flags contains ename:VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT, the pname:framebuffer member of pname:pInheritanceInfo must: be either sname:VK_NULL_HANDLE, or a valid sname:VkFramebuffer that is compatible with the pname:renderPass member of pname:pInheritanceInfo</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkRenderPassBeginInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member><type>VkRenderPass</type>           <name>renderPass</name></member>
+            <member><type>VkFramebuffer</type>          <name>framebuffer</name></member>
+            <member><type>VkRect2D</type>               <name>renderArea</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>clearValueCount</name></member>
+            <member len="clearValueCount">const <type>VkClearValue</type>*    <name>pClearValues</name></member>
+            <validity>
+                <usage>The value of pname:clearValueCount must: be greater than or equal to the number of attachments in pname:renderPass that specify a pname:loadOp of ename:VK_ATTACHMENT_LOAD_OP_CLEAR</usage>
+            </validity>
+        </type>
+        <type category="union" name="VkClearColorValue" comment="// Union allowing specification of floating point, integer, or unsigned integer color data. Actual value selected is based on image/attachment being cleared.">
+            <member><type>float</type>                  <name>float32</name>[4]</member>
+            <member><type>int32_t</type>                <name>int32</name>[4]</member>
+            <member><type>uint32_t</type>               <name>uint32</name>[4]</member>
+        </type>
+        <type category="struct" name="VkClearDepthStencilValue">
+            <member><type>float</type>                  <name>depth</name></member>
+            <member><type>uint32_t</type>               <name>stencil</name></member>
+        </type>
+        <type category="union" name="VkClearValue" comment="// Union allowing specification of color or depth and stencil values. Actual value selected is based on attachment being cleared.">
+            <member><type>VkClearColorValue</type>      <name>color</name></member>
+            <member><type>VkClearDepthStencilValue</type> <name>depthStencil</name></member>
+        </type>
+        <type category="struct" name="VkClearAttachment">
+            <member><type>VkImageAspectFlags</type>     <name>aspectMask</name></member>
+            <member><type>uint32_t</type>               <name>colorAttachment</name></member>
+            <member><type>VkClearValue</type>           <name>clearValue</name></member>
+            <validity>
+                <usage>If pname:aspectMask includes ename:VK_IMAGE_ASPECT_COLOR_BIT, it mustnot: include ename:VK_IMAGE_ASPECT_DEPTH_BIT or ename:VK_IMAGE_ASPECT_STENCIL_BIT</usage>
+                <usage>pname:aspectMask mustnot: include ename:VK_IMAGE_ASPECT_METADATA_BIT</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkAttachmentDescription">
+            <member optional="true"><type>VkAttachmentDescriptionFlags</type> <name>flags</name></member>
+            <member><type>VkFormat</type>               <name>format</name></member>
+            <member><type>VkSampleCountFlagBits</type>  <name>samples</name></member>
+            <member><type>VkAttachmentLoadOp</type>     <name>loadOp</name></member>                         <!-- Load operation for color or depth data -->
+            <member><type>VkAttachmentStoreOp</type>    <name>storeOp</name></member>                        <!-- Store operation for color or depth data -->
+            <member><type>VkAttachmentLoadOp</type>     <name>stencilLoadOp</name></member>                  <!-- Load operation for stencil data -->
+            <member><type>VkAttachmentStoreOp</type>    <name>stencilStoreOp</name></member>                 <!-- Store operation for stencil data -->
+            <member><type>VkImageLayout</type>          <name>initialLayout</name></member>
+            <member><type>VkImageLayout</type>          <name>finalLayout</name></member>
+        </type>
+        <type category="struct" name="VkAttachmentReference">
+            <member><type>uint32_t</type>               <name>attachment</name></member>
+            <member><type>VkImageLayout</type>          <name>layout</name></member>
+        </type>
+        <type category="struct" name="VkSubpassDescription">
+            <member optional="true"><type>VkSubpassDescriptionFlags</type> <name>flags</name></member>
+            <member><type>VkPipelineBindPoint</type>    <name>pipelineBindPoint</name></member>              <!-- Must be VK_PIPELINE_BIND_POINT_GRAPHICS for now -->
+            <member optional="true"><type>uint32_t</type>               <name>inputAttachmentCount</name></member>
+            <member len="inputAttachmentCount">const <type>VkAttachmentReference</type>* <name>pInputAttachments</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>colorAttachmentCount</name></member>
+            <member len="colorAttachmentCount">const <type>VkAttachmentReference</type>* <name>pColorAttachments</name></member>
+            <member optional="true" len="colorAttachmentCount">const <type>VkAttachmentReference</type>* <name>pResolveAttachments</name></member>
+            <member optional="true">const <type>VkAttachmentReference</type>* <name>pDepthStencilAttachment</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>preserveAttachmentCount</name></member>
+            <member len="preserveAttachmentCount">const <type>uint32_t</type>* <name>pPreserveAttachments</name></member>
+            <validity>
+                <usage>pname:pipelineBindPoint must: be ename:VK_PIPELINE_BIND_POINT_GRAPHICS</usage>
+                <usage>The value of pname:colorCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxColorAttachments</usage>
+                <usage>If the first use of an attachment in this render pass is as an input attachment, and the attachment is not also used as a color or depth/stencil attachment in the same subpass, then pname:loadOp mustnot: be ename:VK_ATTACHMENT_LOAD_OP_CLEAR</usage>
+                <usage>If pname:pResolveAttachments is not `NULL`, for each resolve attachment that does not have the value ename:VK_ATTACHMENT_UNUSED, the corresponding color attachment mustnot: have the value ename:VK_ATTACHMENT_UNUSED</usage>
+                <usage>If pname:pResolveAttachments is not `NULL`, the sample count of each element of pname:pColorAttachments must: be anything other than ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>Any given element of pname:pResolveAttachments must: have a sample count of ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>Any given element of pname:pResolveAttachments must: have the same elink:VkFormat as its corresponding color attachment</usage>
+                <usage>All attachments in pname:pColorAttachments and pname:pDepthStencilAttachment that are not ename:VK_ATTACHMENT_UNUSED must: have the same sample count</usage>
+                <usage>If any input attachments are ename:VK_ATTACHMENT_UNUSED, then any pipelines bound during the subpass mustnot: accesss those input attachments from the fragment shader</usage>
+                <usage>The pname:attachment member of any element of pname:pPreserveAttachments mustnot: be ename:VK_ATTACHMENT_UNUSED</usage>
+                <usage>Any given element of pname:pPreserveAttachments mustnot: also be an element of any other member of the subpass description</usage>
+                <usage>If any attachment is used as both an input attachment and a color or depth/stencil attachment, then each use must use the same pname:layout</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSubpassDependency">
+            <member><type>uint32_t</type>               <name>srcSubpass</name></member>
+            <member><type>uint32_t</type>               <name>dstSubpass</name></member>
+            <member><type>VkPipelineStageFlags</type>   <name>srcStageMask</name></member>
+            <member><type>VkPipelineStageFlags</type>   <name>dstStageMask</name></member>
+            <member optional="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name></member>                  <!-- Memory accesses from the source of the dependency to synchronize -->
+            <member optional="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name></member>                  <!-- Memory accesses from the destination of the dependency to synchronize -->
+            <member optional="true"><type>VkDependencyFlags</type>      <name>dependencyFlags</name></member>
+            <validity>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>The value of pname:srcSubpass must: be less than or equal to pname:dstSubpass, unless one of them is ename:VK_SUBPASS_EXTERNAL, to avoid cyclic dependencies and ensure a valid execution order</usage>
+                <usage>The values of pname:srcSubpass and pname:dstSubpass mustnot: both be equal to ename:VK_SUBPASS_EXTERNAL</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkRenderPassCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkRenderPassCreateFlags</type>    <name>flags</name></member>                      <!-- Reserved -->
+            <member optional="true"><type>uint32_t</type>   <name>attachmentCount</name></member>
+            <member len="attachmentCount">const <type>VkAttachmentDescription</type>* <name>pAttachments</name></member>
+            <member><type>uint32_t</type>               <name>subpassCount</name></member>
+            <member len="subpassCount">const <type>VkSubpassDescription</type>* <name>pSubpasses</name></member>
+            <member optional="true"><type>uint32_t</type>       <name>dependencyCount</name></member>
+            <member len="dependencyCount">const <type>VkSubpassDependency</type>* <name>pDependencies</name></member>
+            <validity>
+                <usage>If any two subpasses operate on attachments with overlapping ranges of the same sname:VkDeviceMemory object, and at least one subpass writes to that area of sname:VkDeviceMemory, a subpass dependency must: be included (either directly or via some intermediate subpasses) between them</usage>
+                <usage>If the pname:attachment member of any element of pname:pInputAttachments, pname:pColorAttachments, pname:pResolveAttachments or pname:pDepthStencilAttachment, or the attachment indexed by any element of pname:pPreserveAttachments in any given element of pname:pSubpasses is bound to a range of a sname:VkDeviceMemory object that overlaps with any other attachment in any subpass (including the same subpass), the sname:VkAttachmentReference structures describing them must: include ename:VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT in pname:flags</usage>
+                <usage>If the pname:attachment member of any element of pname:pInputAttachments, pname:pColorAttachments, pname:pResolveAttachments or pname:pDepthStencilAttachment, or the value of any element of pname:pPreserveAttachments in any given element of pname:pSubpasses is not ename:VK_ATTACHMENT_UNUSED, it must: be less than the value of pname:attachmentCount</usage>
+                <usage>The value of any element of the pname:pPreserveAttachments member in any given element of pname:pSubpasses mustnot: be ename:VK_ATTACHMENT_UNUSED</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkEventCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_EVENT_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkEventCreateFlags</type>     <name>flags</name></member>                          <!-- Event creation flags -->
+        </type>
+        <type category="struct" name="VkFenceCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_FENCE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkFenceCreateFlags</type>     <name>flags</name></member>                          <!-- Fence creation flags -->
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFeatures">
+            <member><type>VkBool32</type>               <name>robustBufferAccess</name></member>                <!-- out of bounds buffer accesses are well defined -->
+            <member><type>VkBool32</type>               <name>fullDrawIndexUint32</name></member>               <!-- full 32-bit range of indices for indexed draw calls -->
+            <member><type>VkBool32</type>               <name>imageCubeArray</name></member>                    <!-- image views which are arrays of cube maps -->
+            <member><type>VkBool32</type>               <name>independentBlend</name></member>                  <!-- blending operations are controlled per-attachment -->
+            <member><type>VkBool32</type>               <name>geometryShader</name></member>                    <!-- geometry stage -->
+            <member><type>VkBool32</type>               <name>tessellationShader</name></member>                <!-- tessellation control and evaluation stage -->
+            <member><type>VkBool32</type>               <name>sampleRateShading</name></member>                 <!-- per-sample shading and interpolation -->
+            <member><type>VkBool32</type>               <name>dualSrcBlend</name></member>                      <!-- blend operations which take two sources -->
+            <member><type>VkBool32</type>               <name>logicOp</name></member>                           <!-- logic operations -->
+            <member><type>VkBool32</type>               <name>multiDrawIndirect</name></member>                 <!-- multi draw indirect -->
+            <member><type>VkBool32</type>               <name>drawIndirectFirstInstance</name></member>         <!-- indirect draws can use non-zero firstInstance -->
+            <member><type>VkBool32</type>               <name>depthClamp</name></member>                        <!-- depth clamping -->
+            <member><type>VkBool32</type>               <name>depthBiasClamp</name></member>                    <!-- depth bias clamping -->
+            <member><type>VkBool32</type>               <name>fillModeNonSolid</name></member>                  <!-- point and wireframe fill modes -->
+            <member><type>VkBool32</type>               <name>depthBounds</name></member>                       <!-- depth bounds test -->
+            <member><type>VkBool32</type>               <name>wideLines</name></member>                         <!-- lines with width greater than 1 -->
+            <member><type>VkBool32</type>               <name>largePoints</name></member>                       <!-- points with size greater than 1 -->
+            <member><type>VkBool32</type>               <name>alphaToOne</name></member>                        <!-- the fragment alpha component can be forced to maximum representable alpha value -->
+            <member><type>VkBool32</type>               <name>multiViewport</name></member>                     <!-- viewport arrays -->
+            <member><type>VkBool32</type>               <name>samplerAnisotropy</name></member>                 <!-- anisotropic sampler filtering -->
+            <member><type>VkBool32</type>               <name>textureCompressionETC2</name></member>            <!-- ETC texture compression formats -->
+            <member><type>VkBool32</type>               <name>textureCompressionASTC_LDR</name></member>        <!-- ASTC LDR texture compression formats -->
+            <member><type>VkBool32</type>               <name>textureCompressionBC</name></member>              <!-- BC1-7 texture compressed formats -->
+            <member><type>VkBool32</type>               <name>occlusionQueryPrecise</name></member>             <!-- precise occlusion queries returning actual sample counts -->
+            <member><type>VkBool32</type>               <name>pipelineStatisticsQuery</name></member>           <!-- pipeline statistics query -->
+            <member><type>VkBool32</type>               <name>vertexPipelineStoresAndAtomics</name></member>    <!-- stores and atomic ops on storage buffers and images are supported in vertex, tessellation, and geometry stages -->
+            <member><type>VkBool32</type>               <name>fragmentStoresAndAtomics</name></member>          <!-- stores and atomic ops on storage buffers and images are supported in the fragment stage -->
+            <member><type>VkBool32</type>               <name>shaderTessellationAndGeometryPointSize</name></member><!-- tessellation and geometry stages can export point size -->
+            <member><type>VkBool32</type>               <name>shaderImageGatherExtended</name></member>         <!-- image gather with run-time values and independent offsets -->
+            <member><type>VkBool32</type>               <name>shaderStorageImageExtendedFormats</name></member> <!-- the extended set of formats can be used for storage images -->
+            <member><type>VkBool32</type>               <name>shaderStorageImageMultisample</name></member>     <!-- multisample images can be used for storage images -->
+            <member><type>VkBool32</type>               <name>shaderStorageImageReadWithoutFormat</name></member>       <!-- read from storage image does not require format qualifier -->
+            <member><type>VkBool32</type>               <name>shaderStorageImageWriteWithoutFormat</name></member>      <!-- write to storage image does not require format qualifier -->
+            <member><type>VkBool32</type>               <name>shaderUniformBufferArrayDynamicIndexing</name></member>   <!-- arrays of uniform buffers can be accessed with dynamically uniform indices -->
+            <member><type>VkBool32</type>               <name>shaderSampledImageArrayDynamicIndexing</name></member>    <!-- arrays of sampled images can be accessed with dynamically uniform indices -->
+            <member><type>VkBool32</type>               <name>shaderStorageBufferArrayDynamicIndexing</name></member>   <!-- arrays of storage buffers can be accessed with dynamically uniform indices -->
+            <member><type>VkBool32</type>               <name>shaderStorageImageArrayDynamicIndexing</name></member>    <!-- arrays of storage images can be accessed with dynamically uniform indices -->
+            <member><type>VkBool32</type>               <name>shaderClipDistance</name></member>                <!-- clip distance in shaders -->
+            <member><type>VkBool32</type>               <name>shaderCullDistance</name></member>                <!-- cull distance in shaders -->
+            <member><type>VkBool32</type>               <name>shaderFloat64</name></member>                     <!-- 64-bit floats (doubles) in shaders -->
+            <member><type>VkBool32</type>               <name>shaderInt64</name></member>                       <!-- 64-bit integers in shaders -->
+            <member><type>VkBool32</type>               <name>shaderInt16</name></member>                       <!-- 16-bit integers in shaders -->
+            <member><type>VkBool32</type>               <name>shaderResourceResidency</name></member>           <!-- shader can use texture operations that return resource residency information (requires sparseNonResident support) -->
+            <member><type>VkBool32</type>               <name>shaderResourceMinLod</name></member>              <!-- shader can use texture operations that specify minimum resource level of detail -->
+            <member><type>VkBool32</type>               <name>sparseBinding</name></member>                     <!-- Sparse resources support: Resource memory can be managed at opaque page level rather than object level -->
+            <member><type>VkBool32</type>               <name>sparseResidencyBuffer</name></member>             <!-- Sparse resources support: GPU can access partially resident buffers  -->
+            <member><type>VkBool32</type>               <name>sparseResidencyImage2D</name></member>            <!-- Sparse resources support: GPU can access partially resident 2D (non-MSAA non-depth/stencil) images  -->
+            <member><type>VkBool32</type>               <name>sparseResidencyImage3D</name></member>            <!-- Sparse resources support: GPU can access partially resident 3D images  -->
+            <member><type>VkBool32</type>               <name>sparseResidency2Samples</name></member>           <!-- Sparse resources support: GPU can access partially resident MSAA 2D images with 2 samples -->
+            <member><type>VkBool32</type>               <name>sparseResidency4Samples</name></member>           <!-- Sparse resources support: GPU can access partially resident MSAA 2D images with 4 samples -->
+            <member><type>VkBool32</type>               <name>sparseResidency8Samples</name></member>           <!-- Sparse resources support: GPU can access partially resident MSAA 2D images with 8 samples -->
+            <member><type>VkBool32</type>               <name>sparseResidency16Samples</name></member>          <!-- Sparse resources support: GPU can access partially resident MSAA 2D images with 16 samples -->
+            <member><type>VkBool32</type>               <name>sparseResidencyAliased</name></member>            <!-- Sparse resources support: GPU can correctly access data aliased into multiple locations (opt-in) -->
+            <member><type>VkBool32</type>               <name>variableMultisampleRate</name></member>           <!-- multisample rate must be the same for all pipelines in a subpass -->
+            <member><type>VkBool32</type>               <name>inheritedQueries</name></member>                  <!-- Queries may be inherited from primary to secondary command buffers -->
+            <validity>
+                <usage>If the value of any member of this structure is ename:VK_FALSE, as returned by flink:vkGetPhysicalDeviceFeatures, then it must: be ename:VK_FALSE when passed as part of the sname:VkDeviceCreateInfo struct when creating a device</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceSparseProperties" returnedonly="true">
+            <member><type>VkBool32</type>               <name>residencyStandard2DBlockShape</name></member> <!-- Sparse resources support: GPU will access all 2D (single sample) sparse resources using the standard block shapes (based on pixel format) -->
+            <member><type>VkBool32</type>               <name>residencyStandard2DMultisampleBlockShape</name></member> <!-- Sparse resources support: GPU will access all 2D (multisample) sparse resources using the standard block shapes (based on pixel format) -->
+            <member><type>VkBool32</type>               <name>residencyStandard3DBlockShape</name></member> <!-- Sparse resources support: GPU will access all 3D sparse resources using the standard block shapes (based on pixel format) -->
+            <member><type>VkBool32</type>               <name>residencyAlignedMipSize</name></member>     <!-- Sparse resources support: Images with mip-level dimensions that are NOT a multiple of the block size will be placed in the mip tail -->
+            <member><type>VkBool32</type>               <name>residencyNonResidentStrict</name></member>  <!-- Sparse resources support: GPU can consistently access non-resident regions of a resource, all reads return as if data is 0, writes are discarded -->
+        </type>
+        <type category="struct" name="VkPhysicalDeviceLimits" returnedonly="true">
+                <!-- resource maximum sizes -->
+            <member><type>uint32_t</type>               <name>maxImageDimension1D</name></member>               <!-- max 1D image dimension -->
+            <member><type>uint32_t</type>               <name>maxImageDimension2D</name></member>               <!-- max 2D image dimension -->
+            <member><type>uint32_t</type>               <name>maxImageDimension3D</name></member>               <!-- max 3D image dimension -->
+            <member><type>uint32_t</type>               <name>maxImageDimensionCube</name></member>             <!-- max cubemap image dimension -->
+            <member><type>uint32_t</type>               <name>maxImageArrayLayers</name></member>               <!-- max layers for image arrays -->
+            <member><type>uint32_t</type>               <name>maxTexelBufferElements</name></member>            <!-- max texel buffer size (fstexels) -->
+            <member><type>uint32_t</type>               <name>maxUniformBufferRange</name></member>             <!-- max uniform buffer range (bytes) -->
+            <member><type>uint32_t</type>               <name>maxStorageBufferRange</name></member>             <!-- max storage buffer range (bytes) -->
+            <member><type>uint32_t</type>               <name>maxPushConstantsSize</name></member>              <!-- max size of the push constants pool (bytes) -->
+                <!-- memory limits -->
+            <member><type>uint32_t</type>               <name>maxMemoryAllocationCount</name></member>          <!-- max number of device memory allocations supported -->
+            <member><type>uint32_t</type>               <name>maxSamplerAllocationCount</name></member>         <!-- max number of samplers that can be allocated on a device -->
+            <member><type>VkDeviceSize</type>           <name>bufferImageGranularity</name></member>            <!-- Granularity (in bytes) at which buffers and images can be bound to adjacent memory for simultaneous usage -->
+            <member><type>VkDeviceSize</type>           <name>sparseAddressSpaceSize</name></member>            <!-- Total address space available for sparse allocations (bytes) -->
+                <!-- descriptor set limits -->
+            <member><type>uint32_t</type>               <name>maxBoundDescriptorSets</name></member>                <!-- max number of descriptors sets that can be bound to a pipeline -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorSamplers</name></member>         <!-- max number of samplers allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorUniformBuffers</name></member>   <!-- max number of uniform buffers allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorStorageBuffers</name></member>   <!-- max number of storage buffers allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorSampledImages</name></member>    <!-- max number of sampled images allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorStorageImages</name></member>    <!-- max number of storage images allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageDescriptorInputAttachments</name></member> <!-- max number of input attachments allowed per-stage in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxPerStageResources</name></member>                  <!-- max number of resources allowed by a single stage -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetSamplers</name></member>              <!-- max number of samplers allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetUniformBuffers</name></member>        <!-- max number of uniform buffers allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetUniformBuffersDynamic</name></member> <!-- max number of dynamic uniform buffers allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetStorageBuffers</name></member>        <!-- max number of storage buffers allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetStorageBuffersDynamic</name></member> <!-- max number of dynamic storage buffers allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetSampledImages</name></member>         <!-- max number of sampled images allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetStorageImages</name></member>         <!-- max number of storage images allowed in all stages in a descriptor set -->
+            <member><type>uint32_t</type>               <name>maxDescriptorSetInputAttachments</name></member>      <!-- max number of input attachments allowed in all stages in a descriptor set -->
+                <!-- vertex stage limits -->
+            <member><type>uint32_t</type>               <name>maxVertexInputAttributes</name></member>          <!-- max number of vertex input attribute slots -->
+            <member><type>uint32_t</type>               <name>maxVertexInputBindings</name></member>            <!-- max number of vertex input binding slots -->
+            <member><type>uint32_t</type>               <name>maxVertexInputAttributeOffset</name></member>     <!-- max vertex input attribute offset added to vertex buffer offset -->
+            <member><type>uint32_t</type>               <name>maxVertexInputBindingStride</name></member>       <!-- max vertex input binding stride -->
+            <member><type>uint32_t</type>               <name>maxVertexOutputComponents</name></member>         <!-- max number of output components written by vertex shader -->
+                <!-- tessellation control stage limits -->
+            <member><type>uint32_t</type>               <name>maxTessellationGenerationLevel</name></member>                   <!-- max level supported by tessellation primitive generator -->
+            <member><type>uint32_t</type>               <name>maxTessellationPatchSize</name></member>                  <!-- max patch size (vertices) -->
+            <member><type>uint32_t</type>               <name>maxTessellationControlPerVertexInputComponents</name></member>    <!-- max number of input components per-vertex in TCS -->
+            <member><type>uint32_t</type>               <name>maxTessellationControlPerVertexOutputComponents</name></member>   <!-- max number of output components per-vertex in TCS -->
+            <member><type>uint32_t</type>               <name>maxTessellationControlPerPatchOutputComponents</name></member>    <!-- max number of output components per-patch in TCS -->
+            <member><type>uint32_t</type>               <name>maxTessellationControlTotalOutputComponents</name></member>       <!-- max total number of per-vertex and per-patch output components in TCS -->
+                <!-- tessellation evaluation stage limits -->
+            <member><type>uint32_t</type>               <name>maxTessellationEvaluationInputComponents</name></member>  <!-- max number of input components per vertex in TES -->
+            <member><type>uint32_t</type>               <name>maxTessellationEvaluationOutputComponents</name></member> <!-- max number of output components per vertex in TES -->
+                <!-- geometry stage limits -->
+            <member><type>uint32_t</type>               <name>maxGeometryShaderInvocations</name></member>      <!-- max invocation count supported in geometry shader -->
+            <member><type>uint32_t</type>               <name>maxGeometryInputComponents</name></member>        <!-- max number of input components read in geometry stage -->
+            <member><type>uint32_t</type>               <name>maxGeometryOutputComponents</name></member>       <!-- max number of output components written in geometry stage -->
+            <member><type>uint32_t</type>               <name>maxGeometryOutputVertices</name></member>         <!-- max number of vertices that can be emitted in geometry stage -->
+            <member><type>uint32_t</type>               <name>maxGeometryTotalOutputComponents</name></member>  <!-- max total number of components (all vertices) written in geometry stage -->
+                <!-- fragment stage limits -->
+            <member><type>uint32_t</type>               <name>maxFragmentInputComponents</name></member>        <!-- max number of input compontents read in fragment stage -->
+            <member><type>uint32_t</type>               <name>maxFragmentOutputAttachments</name></member>      <!-- max number of output attachments written in fragment stage -->
+            <member><type>uint32_t</type>               <name>maxFragmentDualSrcAttachments</name></member>     <!-- max number of output attachments written when using dual source blending -->
+            <member><type>uint32_t</type>               <name>maxFragmentCombinedOutputResources</name></member><!-- max total number of storage buffers, storage images and output buffers -->
+                <!-- compute stage limits -->
+            <member><type>uint32_t</type>               <name>maxComputeSharedMemorySize</name></member>        <!-- max total storage size of work group local storage (bytes) -->
+            <member><type>uint32_t</type>               <name>maxComputeWorkGroupCount</name>[3]</member>       <!-- max num of compute work groups that may be dispatched
+                                                                                                                     by a single command (x,y,z) -->
+            <member><type>uint32_t</type>               <name>maxComputeWorkGroupInvocations</name></member>    <!-- max total compute invocations in a single local work group -->
+            <member><type>uint32_t</type>               <name>maxComputeWorkGroupSize</name>[3]</member>        <!-- max local size of a compute work group (x,y,z) -->
+
+            <member><type>uint32_t</type>               <name>subPixelPrecisionBits</name></member>             <!-- number bits of subpixel precision in screen x and y-->
+            <member><type>uint32_t</type>               <name>subTexelPrecisionBits</name></member>             <!-- number bits of precision for selecting texel weights-->
+            <member><type>uint32_t</type>               <name>mipmapPrecisionBits</name></member>               <!-- number bits of precision for selecting mipmap weights -->
+
+            <member><type>uint32_t</type>               <name>maxDrawIndexedIndexValue</name></member>          <!-- max index value for indexed draw calls (for 32-bit indices) -->
+            <member><type>uint32_t</type>               <name>maxDrawIndirectCount</name></member>              <!-- max draw count for indirect draw calls -->
+
+            <member><type>float</type>                  <name>maxSamplerLodBias</name></member>                 <!-- max absolute sampler level of detail bias -->
+            <member><type>float</type>                  <name>maxSamplerAnisotropy</name></member>              <!-- max degree of sampler anisotropy -->
+
+            <member><type>uint32_t</type>               <name>maxViewports</name></member>                      <!-- max number of active viewports -->
+            <member><type>uint32_t</type>               <name>maxViewportDimensions</name>[2]</member>          <!-- max viewport dimensions (x,y) -->
+            <member><type>float</type>                  <name>viewportBoundsRange</name>[2]</member>            <!-- viewport bounds range (min,max) -->
+            <member><type>uint32_t</type>               <name>viewportSubPixelBits</name></member>              <!-- number bits of subpixel precision for viewport -->
+
+            <member><type>size_t</type>                 <name>minMemoryMapAlignment</name></member>             <!-- min required alignment of pointers returned by MapMemory (bytes) -->
+            <member><type>VkDeviceSize</type>           <name>minTexelBufferOffsetAlignment</name></member>     <!-- min required alignment for texel buffer offsets (bytes)  -->
+            <member><type>VkDeviceSize</type>           <name>minUniformBufferOffsetAlignment</name></member>   <!-- min required alignment for uniform buffer sizes and offsets (bytes) -->
+            <member><type>VkDeviceSize</type>           <name>minStorageBufferOffsetAlignment</name></member>   <!-- min required alignment for storage buffer offsets (bytes) -->
+
+            <member><type>int32_t</type>                <name>minTexelOffset</name></member>                    <!-- min texel offset for OpTextureSampleOffset -->
+            <member><type>uint32_t</type>               <name>maxTexelOffset</name></member>                    <!-- max texel offset for OpTextureSampleOffset -->
+            <member><type>int32_t</type>                <name>minTexelGatherOffset</name></member>              <!-- min texel offset for OpTextureGatherOffset -->
+            <member><type>uint32_t</type>               <name>maxTexelGatherOffset</name></member>              <!-- max texel offset for OpTextureGatherOffset -->
+            <member><type>float</type>                  <name>minInterpolationOffset</name></member>            <!-- furthest negative offset for interpolateAtOffset -->
+            <member><type>float</type>                  <name>maxInterpolationOffset</name></member>            <!-- furthest positive offset for interpolateAtOffset -->
+            <member><type>uint32_t</type>               <name>subPixelInterpolationOffsetBits</name></member>   <!-- number of subpixel bits for interpolateAtOffset -->
+
+            <member><type>uint32_t</type>               <name>maxFramebufferWidth</name></member>               <!-- max width for a framebuffer -->
+            <member><type>uint32_t</type>               <name>maxFramebufferHeight</name></member>              <!-- max height for a framebuffer -->
+            <member><type>uint32_t</type>               <name>maxFramebufferLayers</name></member>              <!-- max layer count for a layered framebuffer -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>framebufferColorSampleCounts</name></member>      <!-- supported color sample counts for a framebuffer -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>framebufferDepthSampleCounts</name></member>      <!-- supported depth sample counts for a framebuffer -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>framebufferStencilSampleCounts</name></member>    <!-- supported stencil sample counts for a framebuffer -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>framebufferNoAttachmentsSampleCounts</name></member> <!-- supported sample counts for a framebuffer with no attachments -->
+            <member><type>uint32_t</type>               <name>maxColorAttachments</name></member>               <!-- max number of color attachments per subpass -->
+
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>sampledImageColorSampleCounts</name></member>     <!-- supported color sample counts for a non-integer sampled image -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>sampledImageIntegerSampleCounts</name></member>   <!-- supported sample counts for an integer image -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>sampledImageDepthSampleCounts</name></member>     <!-- supported depth sample counts for a sampled image -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>sampledImageStencilSampleCounts</name></member>   <!-- supported stencil sample counts for a sampled image -->
+            <member optional="true"><type>VkSampleCountFlags</type>     <name>storageImageSampleCounts</name></member>          <!-- supported sample counts for a storage image -->
+            <member><type>uint32_t</type>               <name>maxSampleMaskWords</name></member>                <!-- max number of sample mask words -->
+
+            <member><type>VkBool32</type>               <name>timestampComputeAndGraphics</name></member>       <!-- timestamps on graphics and compute queues -->
+            <member><type>float</type>                  <name>timestampPeriod</name></member>                   <!-- number of nanoseconds it takes for timestamp query value to increment by 1 -->
+
+            <member><type>uint32_t</type>               <name>maxClipDistances</name></member>                  <!-- max number of clip distances -->
+            <member><type>uint32_t</type>               <name>maxCullDistances</name></member>                  <!-- max number of cull distances -->
+            <member><type>uint32_t</type>               <name>maxCombinedClipAndCullDistances</name></member>   <!-- max combined number of user clipping -->
+
+            <member><type>uint32_t</type>               <name>discreteQueuePriorities</name></member>           <!-- distinct queue priorities available  -->
+
+            <member><type>float</type>                  <name>pointSizeRange</name>[2]</member>                 <!-- range (min,max) of supported point sizes -->
+            <member><type>float</type>                  <name>lineWidthRange</name>[2]</member>                 <!-- range (min,max) of supported line widths -->
+            <member><type>float</type>                  <name>pointSizeGranularity</name></member>              <!-- granularity of supported point sizes -->
+            <member><type>float</type>                  <name>lineWidthGranularity</name></member>              <!-- granularity of supported line widths -->
+            <member><type>VkBool32</type>               <name>strictLines</name></member>                       <!-- line rasterization follows preferred rules -->
+            <member><type>VkBool32</type>               <name>standardSampleLocations</name></member>           <!-- supports standard sample locations for all supported sample counts -->
+            <member><type>VkDeviceSize</type>           <name>optimalBufferCopyOffsetAlignment</name></member>  <!-- optimal offset of buffer copies -->
+            <member><type>VkDeviceSize</type>           <name>optimalBufferCopyRowPitchAlignment</name></member><!-- optimal pitch of buffer copies -->
+            <member><type>VkDeviceSize</type>           <name>nonCoherentAtomSize</name></member>               <!-- minimum size and alignment for non-coherent host-mapped device memory access -->
+        </type>
+        <type category="struct" name="VkSemaphoreCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkSemaphoreCreateFlags</type> <name>flags</name></member>                          <!-- Semaphore creation flags -->
+        </type>
+        <type category="struct" name="VkQueryPoolCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkQueryPoolCreateFlags</type> <name>flags</name></member>                          <!-- Reserved -->
+            <member><type>VkQueryType</type>            <name>queryType</name></member>
+            <member><type>uint32_t</type>               <name>queryCount</name></member>
+            <member optional="true" noautovalidity="true"><type>VkQueryPipelineStatisticFlags</type> <name>pipelineStatistics</name></member>      <!-- Optional -->
+            <validity>
+                <usage>If the &lt;&lt;features-features-pipelineStatisticsQuery,pipeline statistics queries&gt;&gt; feature is not enabled, pname:queryType mustnot: be ename:VK_QUERY_TYPE_PIPELINE_STATISTICS</usage>
+                <usage>If pname:queryType is ename:VK_QUERY_TYPE_PIPELINE_STATISTICS, pname:pipelineStatistics must: be a valid combination of elink:VkQueryPipelineStatisticFlagBits values</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkFramebufferCreateInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Must be VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>VkFramebufferCreateFlags</type>    <name>flags</name></member>                     <!-- Reserved -->
+            <member><type>VkRenderPass</type>           <name>renderPass</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>attachmentCount</name></member>
+            <member len="attachmentCount">const <type>VkImageView</type>*     <name>pAttachments</name></member>
+            <member><type>uint32_t</type>               <name>width</name></member>
+            <member><type>uint32_t</type>               <name>height</name></member>
+            <member><type>uint32_t</type>               <name>layers</name></member>
+            <validity>
+                <usage>The value of pname:attachmentCount must: be equal to the attachment count specified in pname:renderPass</usage>
+                <usage>Any given element of pname:pAttachments that is used as a color attachment or resolve attachment by pname:renderPass must: have been created with a pname:usage value including ename:VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT</usage>
+                <usage>Any given element of pname:pAttachments that is used as a depth/stencil attachment by pname:renderPass must: have been created with a pname:usage value including ename:VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT</usage>
+                <usage>Any given element of pname:pAttachments that is used as an input attachment by pname:renderPass must: have been created with a pname:usage value including ename:VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT</usage>
+                <usage>Any given element of pname:pAttachments must: have been created with an elink:VkFormat value that matches the elink:VkFormat specified by the corresponding sname:VkAttachmentDescription in pname:renderPass</usage>
+                <usage>Any given element of pname:pAttachments must: have been created with a pname:samples value that matches the pname:samples value specified by the corresponding sname:VkAttachmentDescription in pname:renderPass</usage>
+                <usage>Any given element of pname:pAttachments must: have dimensions at least as large as the corresponding framebuffer dimension</usage>
+                <usage>Any given element of pname:pAttachments must: only specify a single mip-level</usage>
+                <usage>Any given element of pname:pAttachments must: have been created with identity swizzle</usage>
+                <usage>The value of pname:width must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxFramebufferWidth</usage>
+                <usage>The value of pname:height must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxFramebufferHeight</usage>
+                <usage>The value of pname:layers must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxFramebufferLayers</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDrawIndirectCommand">
+            <member><type>uint32_t</type>               <name>vertexCount</name></member>
+            <member><type>uint32_t</type>               <name>instanceCount</name></member>
+            <member><type>uint32_t</type>               <name>firstVertex</name></member>
+            <member><type>uint32_t</type>               <name>firstInstance</name></member>
+            <validity>
+                <usage>For a given vertex buffer binding, any attribute data fetched must: be entirely contained within the corresponding vertex buffer binding, as described in &lt;&lt;fxvertex-input&gt;&gt;</usage>
+                <usage>If the &lt;&lt;features-features-drawIndirectFirstInstance,drawIndirectFirstInstance&gt;&gt; feature is not enabled, pname:firstInstance must: be code:0</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDrawIndexedIndirectCommand">
+            <member><type>uint32_t</type>               <name>indexCount</name></member>
+            <member><type>uint32_t</type>               <name>instanceCount</name></member>
+            <member><type>uint32_t</type>               <name>firstIndex</name></member>
+            <member><type>int32_t</type>                <name>vertexOffset</name></member>
+            <member><type>uint32_t</type>               <name>firstInstance</name></member>
+            <validity>
+                <usage>For a given vertex buffer binding, any attribute data fetched must: be entirely contained within the corresponding vertex buffer binding, as described in &lt;&lt;fxvertex-input&gt;&gt;</usage>
+                <usage>The total value of (pname:indexSize * (pname:firstIndex + pname:indexCount) + pname:offset) must: be less than or equal to the size of the currently bound index buffer, with indexSize being based on the type specified by pname:indexType, where the index buffer, pname:indexType, and pname:offset are specified via fname:vkCmdBindIndexBuffer</usage>
+                <usage>If the &lt;&lt;features-features-drawIndirectFirstInstance,drawIndirectFirstInstance&gt;&gt; feature is not enabled, pname:firstInstance must: be code:0</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDispatchIndirectCommand">
+            <member><type>uint32_t</type>               <name>x</name></member>
+            <member><type>uint32_t</type>               <name>y</name></member>
+            <member><type>uint32_t</type>               <name>z</name></member>
+            <validity>
+                <usage>pname:x must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[0]</usage>
+                <usage>pname:y must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[1]</usage>
+                <usage>pname:z must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[2]</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSubmitInfo">
+            <member><type>VkStructureType</type>        <name>sType</name></member>                          <!-- Type of structure. Should be VK_STRUCTURE_TYPE_SUBMIT_INFO -->
+            <member>const <type>void</type>*            <name>pNext</name></member>                          <!-- Pointer to next structure -->
+            <member optional="true"><type>uint32_t</type>       <name>waitSemaphoreCount</name></member>
+            <member len="waitSemaphoreCount">const <type>VkSemaphore</type>*     <name>pWaitSemaphores</name></member>
+            <member len="waitSemaphoreCount">const <type>VkPipelineStageFlags</type>*           <name>pWaitDstStageMask</name></member>
+            <member optional="true"><type>uint32_t</type>       <name>commandBufferCount</name></member>
+            <member len="commandBufferCount">const <type>VkCommandBuffer</type>*     <name>pCommandBuffers</name></member>
+            <member optional="true"><type>uint32_t</type>       <name>signalSemaphoreCount</name></member>
+            <member len="signalSemaphoreCount">const <type>VkSemaphore</type>*     <name>pSignalSemaphores</name></member>
+            <validity>
+                <usage>Any given element of pname:pSignalSemaphores must: currently be unsignalled</usage>
+                <usage>Any given element of pname:pCommandBuffers must: either have been recorded with the VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT, or not currently be executing on the device</usage>
+                <usage>Any given element of pname:pCommandBuffers must: be in the executable state</usage>
+                <usage>If any given element of pname:pCommandBuffers contains commands that execute secondary command buffers, those secondary command buffers must: have been recorded with the ename:VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT, or not currently be executing on the device</usage>
+                <usage>If any given element of pname:pCommandBuffers was created with ename:VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT, it mustnot: have been previously submitted without re-recording that command buffer</usage>
+                <usage>Any given element of pname:pCommandBuffers mustnot: contain commands that execute a secondary command buffer, if that secondary command buffer has been recorded in another primary command buffer after it was recorded into this sname:VkCommandBuffer</usage>
+                <usage>Any given element of pname:pCommandBuffers must: have been created on a sname:VkCommandPool that was created for the same queue family that the calling command's pname:queue belongs to</usage>
+                <usage>Any given element of pname:pCommandBuffers mustnot: have been created with ename:VK_COMMAND_BUFFER_LEVEL_SECONDARY</usage>
+                <usage>Any given element of sname:VkSemaphore in pname:pWaitSemaphores must: refer to a prior signal of that sname:VkSemaphore that won't be consumed by any other wait on that semaphore</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, any given element of pname:pWaitDstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, any given element of pname:pWaitDstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+            </validity>
+        </type>
+        <!-- WSI extensions -->
+        <type category="struct" name="VkDisplayPropertiesKHR">
+            <member><type>VkDisplayKHR</type>                     <name>display</name></member>                  <!-- Handle of the display object -->
+            <member len="null-terminated">const <type>char</type>*                      <name>displayName</name></member>              <!-- Name of the display -->
+            <member><type>VkExtent2D</type>                       <name>physicalDimensions</name></member>       <!-- In millimeters? -->
+            <member><type>VkExtent2D</type>                       <name>physicalResolution</name></member>       <!-- Max resolution for CRT? -->
+            <member optional="true"><type>VkSurfaceTransformFlagsKHR</type>       <name>supportedTransforms</name></member>      <!-- one or more bits from VkSurfaceTransformFlagsKHR -->
+            <member><type>VkBool32</type>                         <name>planeReorderPossible</name></member>     <!-- VK_TRUE if the overlay plane's z-order can be changed on this display. -->
+            <member><type>VkBool32</type>                         <name>persistentContent</name></member>        <!-- VK_TRUE if this is a "smart" display that supports self-refresh/internal buffering. -->
+        </type>
+        <type category="struct" name="VkDisplayPlanePropertiesKHR">
+            <member><type>VkDisplayKHR</type>                     <name>currentDisplay</name></member>           <!-- Display the plane is currently associated with.  Will be VK_NULL_HANDLE if the plane is not in use. -->
+            <member><type>uint32_t</type>                         <name>currentStackIndex</name></member>        <!-- Current z-order of the plane. -->
+        </type>
+        <type category="struct" name="VkDisplayModeParametersKHR">
+            <member><type>VkExtent2D</type>                       <name>visibleRegion</name></member>            <!-- Visible scannout region. -->
+            <member><type>uint32_t</type>                         <name>refreshRate</name></member>              <!-- Number of times per second the display is updated. -->
+        </type>
+        <type category="struct" name="VkDisplayModePropertiesKHR">
+            <member><type>VkDisplayModeKHR</type>                 <name>displayMode</name></member>              <!-- Handle of this display mode. -->
+            <member><type>VkDisplayModeParametersKHR</type>       <name>parameters</name></member>               <!-- The parameters this mode uses. -->
+        </type>
+        <type category="struct" name="VkDisplayModeCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_DISPLAY_MODE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDisplayModeCreateFlagsKHR</type>      <name>flags</name></member>                    <!-- Reserved -->
+            <member><type>VkDisplayModeParametersKHR</type>       <name>parameters</name></member>               <!-- The parameters this mode uses. -->
+            <validity>
+                <usage>The pname:width and pname:height members of the pname:visibleRegion member of pname:parameters must be greater than `0`</usage>
+                <usage>The pname:refreshRate member of pname:parameters must be greater than `0`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDisplayPlaneCapabilitiesKHR">
+            <member optional="true"><type>VkDisplayPlaneAlphaFlagsKHR</type>      <name>supportedAlpha</name></member>           <!-- Types of alpha blending supported, if any. -->
+            <member><type>VkOffset2D</type>                       <name>minSrcPosition</name></member>           <!-- Does the plane have any position and extent restrictions? -->
+            <member><type>VkOffset2D</type>                       <name>maxSrcPosition</name></member>
+            <member><type>VkExtent2D</type>                       <name>minSrcExtent</name></member>
+            <member><type>VkExtent2D</type>                       <name>maxSrcExtent</name></member>
+            <member><type>VkOffset2D</type>                       <name>minDstPosition</name></member>
+            <member><type>VkOffset2D</type>                       <name>maxDstPosition</name></member>
+            <member><type>VkExtent2D</type>                       <name>minDstExtent</name></member>
+            <member><type>VkExtent2D</type>                       <name>maxDstExtent</name></member>
+        </type>
+        <type category="struct" name="VkDisplaySurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_DISPLAY_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkDisplaySurfaceCreateFlagsKHR</type>   <name>flags</name></member>                    <!-- Reserved -->
+            <member><type>VkDisplayModeKHR</type>                 <name>displayMode</name></member>              <!-- The mode to use when displaying this surface -->
+            <member><type>uint32_t</type>                         <name>planeIndex</name></member>               <!-- The plane on which this surface appears.  Must be between 0 and the value returned by vkGetPhysicalDeviceDisplayPlanePropertiesKHR() in pPropertyCount. -->
+            <member><type>uint32_t</type>                         <name>planeStackIndex</name></member>          <!-- The z-order of the plane. -->
+            <member><type>VkSurfaceTransformFlagBitsKHR</type>    <name>transform</name></member>                <!-- Transform to apply to the images as part of the scannout operation -->
+            <member><type>float</type>                            <name>globalAlpha</name></member>              <!-- Global alpha value.  Must be between 0 and 1, inclusive.  Ignored if alphaMode is not VK_DISPLAY_PLANE_ALPHA_GLOBAL_BIT_KHR -->
+            <member><type>VkDisplayPlaneAlphaFlagBitsKHR</type>   <name>alphaMode</name></member>                <!-- What type of alpha blending to use.  Must be a bit from vkGetDisplayPlanePropertiesKHR::supportedAlpha. -->
+            <member><type>VkExtent2D</type>                       <name>imageExtent</name></member>              <!-- size of the images to use with this surface -->
+            <validity>
+                <usage>pname:planeIndex must: be less than the number of display planes supported by the device as determined by calling fname:vkGetPhysicalDeviceDisplayPlanePropertiesKHR</usage>
+                <usage>If the pname:planeReorderPossible member of the sname:VkDisplayPropertiesKHR structure returned by fname:vkGetPhysicalDeviceDisplayPropertiesKHR for the display corresponding to pname:displayMode is ename:VK_TRUE then pname:planeStackIndex must: be less than the number of display planes supported by the device as determined by calling fname:vkGetPhysicalDeviceDisplayPlanePropertiesKHR; otherwise pname:planeStackIndex must: equal the pname:currentStackIndex member of sname:VkDisplayPlanePropertiesKHR returned by fname:vkGetPhysicalDeviceDisplayPlanePropertiesKHR for the display plane corresponding to pname:displayMode</usage>
+                <usage>If pname:alphaMode is ename:VK_DISPLAY_PLANE_ALPHA_GLOBAL_BIT_KHR then pname:globalAlpha must: be between `0` and `1`, inclusive</usage>
+                <usage>pname:alphaMode must: be `0` or one of the bits present in the pname:supportedAlpha member of sname:VkDisplayPlaneCapabilitiesKHR returned by fname:vkGetDisplayPlaneCapabilitiesKHR for the display plane corresponding to pname:displayMode</usage>
+                <usage>The pname:width and pname:height members of pname:imageExtent must be greater than `0`</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDisplayPresentInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_DISPLAY_PRESENT_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member><type>VkRect2D</type>                         <name>srcRect</name></member>                  <!-- Rectangle within the presentable image to read pixel data from when presenting to the display. -->
+            <member><type>VkRect2D</type>                         <name>dstRect</name></member>                  <!-- Rectangle within the current display mode's visible region to display srcRectangle in. -->
+            <member><type>VkBool32</type>                         <name>persistent</name></member>               <!-- For smart displays, use buffered mode.  If the display properties member "persistentMode" is VK_FALSE, this member must always be VK_FALSE. -->
+            <validity>
+                <usage>pname:srcRect must: specify a rectangular region that is a subset of the image being presented</usage>
+                <usage>pname:dstRect must: specify a rectangular region that is a subset of the pname:visibleRegion parameter of the display mode the swapchain being presented uses</usage>
+                <usage>If the pname:persistentContent member of the sname:VkDisplayPropertiesKHR structure returned by fname:vkGetPhysicalDeviceDisplayPropertiesKHR for the display the present operation targets then pname:persistent must: be ename:VK_FALSE</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkSurfaceCapabilitiesKHR">
+            <member><type>uint32_t</type>                         <name>minImageCount</name></member>            <!-- Supported minimum number of images for the surface -->
+            <member><type>uint32_t</type>                         <name>maxImageCount</name></member>            <!-- Supported maximum number of images for the surface, 0 for unlimited -->
+            <member><type>VkExtent2D</type>                       <name>currentExtent</name></member>            <!-- Current image width and height for the surface, (0, 0) if undefined -->
+            <member><type>VkExtent2D</type>                       <name>minImageExtent</name></member>           <!-- Supported minimum image width and height for the surface -->
+            <member><type>VkExtent2D</type>                       <name>maxImageExtent</name></member>           <!-- Supported maximum image width and height for the surface -->
+            <member><type>uint32_t</type>                         <name>maxImageArrayLayers</name></member>      <!-- Supported maximum number of image layers for the surface -->
+            <member optional="true"><type>VkSurfaceTransformFlagsKHR</type>       <name>supportedTransforms</name></member>      <!-- 1 or more bits representing the transforms supported -->
+            <member><type>VkSurfaceTransformFlagBitsKHR</type>    <name>currentTransform</name></member>         <!-- The surface's current transform relative to the device's natural orientation -->
+            <member optional="true"><type>VkCompositeAlphaFlagsKHR</type>         <name>supportedCompositeAlpha</name></member>  <!-- 1 or more bits representing the alpha compositing modes supported -->
+            <member optional="true"><type>VkImageUsageFlags</type>                <name>supportedUsageFlags</name></member>      <!-- Supported image usage flags for the surface -->
+        </type>
+        <type category="struct" name="VkAndroidSurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkAndroidSurfaceCreateFlagsKHR</type>   <name>flags</name></member>    <!-- Reserved -->
+            <member><type>ANativeWindow</type>*                   <name>window</name></member>
+            <validity>
+                <usage>pname:window mustnot: be in a connected state</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkMirSurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_MIR_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkMirSurfaceCreateFlagsKHR</type>   <name>flags</name></member>        <!-- Reserved -->
+            <member><type>MirConnection</type>*                   <name>connection</name></member>
+            <member><type>MirSurface</type>*                      <name>mirSurface</name></member>
+        </type>
+        <type category="struct" name="VkWaylandSurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkWaylandSurfaceCreateFlagsKHR</type>   <name>flags</name></member>    <!-- Reserved -->
+            <member>struct <type>wl_display</type>*               <name>display</name></member>
+            <member>struct <type>wl_surface</type>*               <name>surface</name></member>
+        </type>
+        <type category="struct" name="VkWin32SurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkWin32SurfaceCreateFlagsKHR</type>   <name>flags</name></member>      <!-- Reserved -->
+            <member><type>HINSTANCE</type>                        <name>hinstance</name></member>
+            <member><type>HWND</type>                             <name>hwnd</name></member>
+        </type>
+        <type category="struct" name="VkXlibSurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkXlibSurfaceCreateFlagsKHR</type>   <name>flags</name></member>       <!-- Reserved -->
+            <member><type>Display</type>*                         <name>dpy</name></member>
+            <member><type>Window</type>                           <name>window</name></member>
+        </type>
+        <type category="struct" name="VkXcbSurfaceCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkXcbSurfaceCreateFlagsKHR</type>   <name>flags</name></member>        <!-- Reserved -->
+            <member><type>xcb_connection_t</type>*                <name>connection</name></member>
+            <member><type>xcb_window_t</type>                     <name>window</name></member>
+        </type>
+        <type category="struct" name="VkSurfaceFormatKHR">
+            <member><type>VkFormat</type>                         <name>format</name></member>                   <!-- Supported pair of rendering format -->
+            <member><type>VkColorSpaceKHR</type>                  <name>colorSpace</name></member>               <!-- and colorspace for the surface -->
+        </type>
+        <type category="struct" name="VkSwapchainCreateInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member optional="true"><type>VkSwapchainCreateFlagsKHR</type>        <name>flags</name></member>                    <!-- Reserved -->
+            <member><type>VkSurfaceKHR</type>                     <name>surface</name></member>                  <!-- The swapchain's target surface -->
+            <member><type>uint32_t</type>                         <name>minImageCount</name></member>            <!-- Minimum number of presentation images the application needs -->
+            <member><type>VkFormat</type>                         <name>imageFormat</name></member>              <!-- Format of the presentation images -->
+            <member><type>VkColorSpaceKHR</type>                  <name>imageColorSpace</name></member>          <!-- Colorspace of the presentation images -->
+            <member><type>VkExtent2D</type>                       <name>imageExtent</name></member>              <!-- Dimensions of the presentation images -->
+            <member><type>uint32_t</type>                         <name>imageArrayLayers</name></member>         <!-- Determines the number of views for multiview/stereo presentation -->
+            <member><type>VkImageUsageFlags</type>                <name>imageUsage</name></member>               <!-- Bits indicating how the presentation images will be used -->
+            <member><type>VkSharingMode</type>                    <name>imageSharingMode</name></member>         <!-- Sharing mode used for the presentation images -->
+            <member optional="true"><type>uint32_t</type>         <name>queueFamilyIndexCount</name></member>    <!-- Number of queue families having access to the images in case of concurrent sharing mode -->
+            <member noautovalidity="true" len="queueFamilyIndexCount">const <type>uint32_t</type>*                  <name>pQueueFamilyIndices</name></member>      <!-- Array of queue family indices having access to the images in case of concurrent sharing mode -->
+            <member><type>VkSurfaceTransformFlagBitsKHR</type>    <name>preTransform</name></member>             <!-- The transform, relative to the device's natural orientation, applied to the image content prior to presentation -->
+            <member><type>VkCompositeAlphaFlagBitsKHR</type>      <name>compositeAlpha</name></member>           <!-- The alpha blending mode used when compositing this surface with other surfaces in the window system -->
+            <member><type>VkPresentModeKHR</type>                 <name>presentMode</name></member>              <!-- Which presentation mode to use for presents on this swap chain -->
+            <member><type>VkBool32</type>                         <name>clipped</name></member>                  <!-- Specifies whether presentable images may be affected by window clip regions -->
+            <member optional="true"><type>VkSwapchainKHR</type>   <name>oldSwapchain</name></member>             <!-- Existing swap chain to replace, if any -->
+            <validity>
+                <usage>pname:surface must: be a surface that is supported by the device as determined using fname:vkGetPhysicalDeviceSurfaceSupportKHR</usage>
+                <usage>pname:minImageCount must: be greater than or equal to the value returned in the pname:minImageCount member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>pname:minImageCount must: be less than or equal to the value returned in the pname:maxImageCount member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface if the returned value of pname:maxImageCount is not zero</usage>
+                <usage>pname:imageFormat and pname:imageColorspace must: match the pname:format and pname:colorSpace members, respectively, of one of the sname:VkSurfaceFormatKHR structures returned by fname:vkGetPhysicalDeviceSurfaceFormatsKHR for the surface</usage>
+                <usage>pname:imageExtent must: be between pname:minImageExtent and pname:maxImageExtent, inclusive, where pname:minImageExtent and pname:maxImageExtent are members of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>pname:imageArrayLayers must: be greater than `0` and less than or equal to the pname:maxImageArrayLayers member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>pname:imageUsage must: be a subset of the supported usage flags present in the pname:supportedUsageFlags member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>If pname:imageSharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:pQueueFamilyIndices must: be a pointer to an array of pname:queueFamilyIndexCount basetype:uint32_t values</usage>
+                <usage>If pname:imageSharingMode is ename:VK_SHARING_MODE_CONCURRENT, pname:queueFamilyIndexCount must: be greater than `1`</usage>
+                <usage>pname:preTransform must: be one of the bits present in the pname:supportedTransforms member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>pname:compositeAlpha must: be one of the bits present in the pname:supportedCompositeAlpha member of the sname:VkSurfaceCapabilitiesKHR structure returned by fname:vkGetPhysicalDeviceSurfaceCapabilitiesKHR for the surface</usage>
+                <usage>pname:presentMode must: be one of the ename:VkPresentModeKHR values returned by fname:vkGetPhysicalDeviceSurfacePresentModesKHR for the surface</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkPresentInfoKHR">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_PRESENT_INFO_KHR -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member><type>uint32_t</type>                         <name>waitSemaphoreCount</name></member>       <!-- Number of semaphores to wait for before presenting -->
+            <member optional="true" len="waitSemaphoreCount">const <type>VkSemaphore</type>* <name>pWaitSemaphores</name></member> <!-- Semaphores to wait for before presenting -->
+            <member><type>uint32_t</type>                         <name>swapchainCount</name></member>           <!-- Number of swap chains to present in this call -->
+            <member len="swapchainCount">const <type>VkSwapchainKHR</type>* <name>pSwapchains</name></member>    <!-- Swapchains to present an image from -->
+            <member len="swapchainCount">const <type>uint32_t</type>* <name>pImageIndices</name></member>        <!-- Indices of which swapchain images to present -->
+            <member optional="true" len="swapchainCount"><type>VkResult</type>* <name>pResults</name></member>   <!-- Optional (i.e. if non-NULL) VkResult for each swapchain -->
+            <validity>
+                <usage>Any given element of pname:pImageIndices must: be the index of a presentable image acquired from the swapchain specified by the corresponding element of the pname:pSwapchains array that is owned by the application</usage>
+                <usage>Any given element of sname:VkSemaphore in pname:pWaitSemaphores must: refer to a prior signal of that sname:VkSemaphore that won't be consumed by any other wait on that semaphore</usage>
+            </validity>
+        </type>
+        <type category="struct" name="VkDebugReportCallbackCreateInfoEXT">
+            <member><type>VkStructureType</type>                  <name>sType</name></member>                    <!-- Must be VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO -->
+            <member>const <type>void</type>*                      <name>pNext</name></member>                    <!-- Pointer to next structure -->
+            <member><type>VkDebugReportFlagsEXT</type>            <name>flags</name></member>                    <!-- Indicates which events call this callback-->
+            <member><type>PFN_vkDebugReportCallbackEXT</type>     <name>pfnCallback</name></member>              <!-- Function pointer of a callback function-->
+            <member optional="true"><type>void</type>*            <name>pUserData</name></member>                <!-- User data provided to callback function -->
+        </type>
+    </types>
+
+    <!-- SECTION: Vulkan enumerant (token) definitions. -->
+
+    <enums name="API Constants" comment="Misc. hardcoded constants - not an enumerated type">
+            <!-- This is part of the header boilerplate -->
+        <enum value="256"   name="VK_MAX_PHYSICAL_DEVICE_NAME_SIZE"/>
+        <enum value="16"    name="VK_UUID_SIZE"/>
+        <enum value="256"   name="VK_MAX_EXTENSION_NAME_SIZE"/>
+        <enum value="256"   name="VK_MAX_DESCRIPTION_SIZE"/>
+        <enum value="32"    name="VK_MAX_MEMORY_TYPES"/>
+        <enum value="16"    name="VK_MAX_MEMORY_HEAPS"/> <!-- The maximum number of unique memory heaps, each of which supporting 1 or more memory types. -->
+        <enum value="1000.0f" name="VK_LOD_CLAMP_NONE"/>
+        <enum value="(~0U)" name="VK_REMAINING_MIP_LEVELS"/>
+        <enum value="(~0U)" name="VK_REMAINING_ARRAY_LAYERS"/>
+        <enum value="(~0ULL)" name="VK_WHOLE_SIZE"/>
+        <enum value="(~0U)" name="VK_ATTACHMENT_UNUSED"/>
+        <enum value="1"     name="VK_TRUE"/>
+        <enum value="0"     name="VK_FALSE"/>
+        <enum value="(~0U)" name="VK_QUEUE_FAMILY_IGNORED"/>
+        <enum value="(~0U)" name="VK_SUBPASS_EXTERNAL"/>
+    </enums>
+
+    <!-- Unlike OpenGL, most tokens in Vulkan are actual typed enumerants in
+         their own numeric namespaces. The "name" attribute is the C enum
+         type name, and is pulled in from a <type> definition above
+         (slightly clunky, but retains the type / enum distinction). "type"
+         attributes of "enum" or "bitmask" indicate that these values should
+         be generated inside an appropriate definition. -->
+
+    <enums name="VkImageLayout" type="enum" expand="VK_IMAGE_LAYOUT">
+        <enum value="0"     name="VK_IMAGE_LAYOUT_UNDEFINED"                         comment="Implicit layout an image is when its contents are undefined due to various reasons (e.g. right after creation)"/>
+        <enum value="1"     name="VK_IMAGE_LAYOUT_GENERAL"                           comment="General layout when image can be used for any kind of access"/>
+        <enum value="2"     name="VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL"          comment="Optimal layout when image is only used for color attachment read/write"/>
+        <enum value="3"     name="VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL"  comment="Optimal layout when image is only used for depth/stencil attachment read/write"/>
+        <enum value="4"     name="VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL"   comment="Optimal layout when image is used for read only depth/stencil attachment and shader access"/>
+        <enum value="5"     name="VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL"          comment="Optimal layout when image is used for read only shader access"/>
+        <enum value="6"     name="VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL"           comment="Optimal layout when image is used only as source of transfer operations"/>
+        <enum value="7"     name="VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL"      comment="Optimal layout when image is used only as destination of transfer operations"/>
+        <enum value="8"     name="VK_IMAGE_LAYOUT_PREINITIALIZED"                    comment="Initial layout used when the data is populated by the CPU"/>
+    </enums>
+    <enums name="VkAttachmentLoadOp" type="enum" expand="VK_ATTACHMENT_LOAD_OP">
+        <enum value="0"     name="VK_ATTACHMENT_LOAD_OP_LOAD"/>
+        <enum value="1"     name="VK_ATTACHMENT_LOAD_OP_CLEAR"/>
+        <enum value="2"     name="VK_ATTACHMENT_LOAD_OP_DONT_CARE"/>
+    </enums>
+    <enums name="VkAttachmentStoreOp" type="enum" expand="VK_ATTACHMENT_STORE_OP">
+        <enum value="0"     name="VK_ATTACHMENT_STORE_OP_STORE"/>
+        <enum value="1"     name="VK_ATTACHMENT_STORE_OP_DONT_CARE"/>
+    </enums>
+    <enums name="VkImageType" type="enum" expand="VK_IMAGE_TYPE">
+        <enum value="0"     name="VK_IMAGE_TYPE_1D"/>
+        <enum value="1"     name="VK_IMAGE_TYPE_2D"/>
+        <enum value="2"     name="VK_IMAGE_TYPE_3D"/>
+    </enums>
+    <enums name="VkImageTiling" type="enum" expand="VK_IMAGE_TILING">
+        <enum value="0"     name="VK_IMAGE_TILING_OPTIMAL"/>
+        <enum value="1"     name="VK_IMAGE_TILING_LINEAR"/>
+    </enums>
+    <enums name="VkImageViewType" type="enum" expand="VK_IMAGE_VIEW_TYPE">
+        <enum value="0"     name="VK_IMAGE_VIEW_TYPE_1D"/>
+        <enum value="1"     name="VK_IMAGE_VIEW_TYPE_2D"/>
+        <enum value="2"     name="VK_IMAGE_VIEW_TYPE_3D"/>
+        <enum value="3"     name="VK_IMAGE_VIEW_TYPE_CUBE"/>
+        <enum value="4"     name="VK_IMAGE_VIEW_TYPE_1D_ARRAY"/>
+        <enum value="5"     name="VK_IMAGE_VIEW_TYPE_2D_ARRAY"/>
+        <enum value="6"     name="VK_IMAGE_VIEW_TYPE_CUBE_ARRAY"/>
+    </enums>
+    <enums name="VkCommandBufferLevel" type="enum" expand="VK_COMMAND_BUFFER_LEVEL">
+        <enum value="0"     name="VK_COMMAND_BUFFER_LEVEL_PRIMARY"/>
+        <enum value="1"     name="VK_COMMAND_BUFFER_LEVEL_SECONDARY"/>
+    </enums>
+    <enums name="VkComponentSwizzle" type="enum" expand="VK_COMPONENT_SWIZZLE">
+        <enum value="0"     name="VK_COMPONENT_SWIZZLE_IDENTITY"/>
+        <enum value="1"     name="VK_COMPONENT_SWIZZLE_ZERO"/>
+        <enum value="2"     name="VK_COMPONENT_SWIZZLE_ONE"/>
+        <enum value="3"     name="VK_COMPONENT_SWIZZLE_R"/>
+        <enum value="4"     name="VK_COMPONENT_SWIZZLE_G"/>
+        <enum value="5"     name="VK_COMPONENT_SWIZZLE_B"/>
+        <enum value="6"     name="VK_COMPONENT_SWIZZLE_A"/>
+    </enums>
+    <enums name="VkDescriptorType" type="enum" expand="VK_DESCRIPTOR_TYPE">
+        <enum value="0"     name="VK_DESCRIPTOR_TYPE_SAMPLER"/>
+        <enum value="1"     name="VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER"/>
+        <enum value="2"     name="VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE"/>
+        <enum value="3"     name="VK_DESCRIPTOR_TYPE_STORAGE_IMAGE"/>
+        <enum value="4"     name="VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER"/>
+        <enum value="5"     name="VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER"/>
+        <enum value="6"     name="VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER"/>
+        <enum value="7"     name="VK_DESCRIPTOR_TYPE_STORAGE_BUFFER"/>
+        <enum value="8"     name="VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC"/>
+        <enum value="9"     name="VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC"/>
+        <enum value="10"    name="VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT"/>
+    </enums>
+    <enums name="VkQueryType" type="enum" expand="VK_QUERY_TYPE">
+        <enum value="0"     name="VK_QUERY_TYPE_OCCLUSION"/>
+        <enum value="1"     name="VK_QUERY_TYPE_PIPELINE_STATISTICS"                 comment="Optional"/>
+        <enum value="2"     name="VK_QUERY_TYPE_TIMESTAMP"/>
+    </enums>
+    <enums name="VkBorderColor" type="enum" expand="VK_BORDER_COLOR">
+        <enum value="0"     name="VK_BORDER_COLOR_FLOAT_TRANSPARENT_BLACK"/>
+        <enum value="1"     name="VK_BORDER_COLOR_INT_TRANSPARENT_BLACK"/>
+        <enum value="2"     name="VK_BORDER_COLOR_FLOAT_OPAQUE_BLACK"/>
+        <enum value="3"     name="VK_BORDER_COLOR_INT_OPAQUE_BLACK"/>
+        <enum value="4"     name="VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE"/>
+        <enum value="5"     name="VK_BORDER_COLOR_INT_OPAQUE_WHITE"/>
+    </enums>
+    <enums name="VkPipelineBindPoint" type="enum" expand="VK_PIPELINE_BIND_POINT">
+        <enum value="0"     name="VK_PIPELINE_BIND_POINT_GRAPHICS"/>
+        <enum value="1"     name="VK_PIPELINE_BIND_POINT_COMPUTE"/>
+    </enums>
+    <enums name="VkPipelineCacheHeaderVersion" type="enum" expand="VK_PIPELINE_CACHE_HEADER_VERSION">
+       <enum value="1"     name="VK_PIPELINE_CACHE_HEADER_VERSION_ONE"/>
+    </enums>
+    <enums name="VkPrimitiveTopology" type="enum" expand="VK_PRIMITIVE_TOPOLOGY">
+        <enum value="0"     name="VK_PRIMITIVE_TOPOLOGY_POINT_LIST"/>
+        <enum value="1"     name="VK_PRIMITIVE_TOPOLOGY_LINE_LIST"/>
+        <enum value="2"     name="VK_PRIMITIVE_TOPOLOGY_LINE_STRIP"/>
+        <enum value="3"     name="VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST"/>
+        <enum value="4"     name="VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP"/>
+        <enum value="5"     name="VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN"/>
+        <enum value="6"     name="VK_PRIMITIVE_TOPOLOGY_LINE_LIST_WITH_ADJACENCY"/>
+        <enum value="7"     name="VK_PRIMITIVE_TOPOLOGY_LINE_STRIP_WITH_ADJACENCY"/>
+        <enum value="8"     name="VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST_WITH_ADJACENCY"/>
+        <enum value="9"     name="VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP_WITH_ADJACENCY"/>
+        <enum value="10"    name="VK_PRIMITIVE_TOPOLOGY_PATCH_LIST"/>
+    </enums>
+    <enums name="VkSharingMode" type="enum" expand="VK_SHARING_MODE">
+        <enum value="0"     name="VK_SHARING_MODE_EXCLUSIVE"/>
+        <enum value="1"     name="VK_SHARING_MODE_CONCURRENT"/>
+    </enums>
+    <enums name="VkIndexType" type="enum" expand="VK_INDEX_TYPE">
+        <enum value="0"     name="VK_INDEX_TYPE_UINT16"/>
+        <enum value="1"     name="VK_INDEX_TYPE_UINT32"/>
+    </enums>
+    <enums name="VkFilter" type="enum" expand="VK_FILTER">
+        <enum value="0"     name="VK_FILTER_NEAREST"/>
+        <enum value="1"     name="VK_FILTER_LINEAR"/>
+    </enums>
+    <enums name="VkSamplerMipmapMode" type="enum" expand="VK_SAMPLER_MIPMAP_MODE">
+        <enum value="0"     name="VK_SAMPLER_MIPMAP_MODE_NEAREST"                        comment="Choose nearest mip level"/>
+        <enum value="1"     name="VK_SAMPLER_MIPMAP_MODE_LINEAR"                         comment="Linear filter between mip levels"/>
+    </enums>
+    <enums name="VkSamplerAddressMode" type="enum" expand="VK_SAMPLER_ADDRESS_MODE">
+        <enum value="0"     name="VK_SAMPLER_ADDRESS_MODE_REPEAT"/>
+        <enum value="1"     name="VK_SAMPLER_ADDRESS_MODE_MIRRORED_REPEAT"/>
+        <enum value="2"     name="VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE"/>
+        <enum value="3"     name="VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_BORDER"/>
+        <enum value="4"     name="VK_SAMPLER_ADDRESS_MODE_MIRROR_CLAMP_TO_EDGE"/>
+    </enums>
+    <enums name="VkCompareOp" type="enum" expand="VK_COMPARE_OP">
+        <enum value="0"     name="VK_COMPARE_OP_NEVER"/>
+        <enum value="1"     name="VK_COMPARE_OP_LESS"/>
+        <enum value="2"     name="VK_COMPARE_OP_EQUAL"/>
+        <enum value="3"     name="VK_COMPARE_OP_LESS_OR_EQUAL"/>
+        <enum value="4"     name="VK_COMPARE_OP_GREATER"/>
+        <enum value="5"     name="VK_COMPARE_OP_NOT_EQUAL"/>
+        <enum value="6"     name="VK_COMPARE_OP_GREATER_OR_EQUAL"/>
+        <enum value="7"     name="VK_COMPARE_OP_ALWAYS"/>
+    </enums>
+    <enums name="VkPolygonMode" type="enum" expand="VK_POLYGON_MODE">
+        <enum value="0"     name="VK_POLYGON_MODE_FILL"/>
+        <enum value="1"     name="VK_POLYGON_MODE_LINE"/>
+        <enum value="2"     name="VK_POLYGON_MODE_POINT"/>
+    </enums>
+    <enums name="VkCullModeFlagBits" type="bitmask">
+        <enum value="0"     name="VK_CULL_MODE_NONE"/>
+        <enum bitpos="0"    name="VK_CULL_MODE_FRONT_BIT"/>
+        <enum bitpos="1"    name="VK_CULL_MODE_BACK_BIT"/>
+        <enum value="0x3"   name="VK_CULL_MODE_FRONT_AND_BACK"/>
+    </enums>
+    <enums name="VkFrontFace" type="enum" expand="VK_FRONT_FACE">
+        <enum value="0"     name="VK_FRONT_FACE_COUNTER_CLOCKWISE"/>
+        <enum value="1"     name="VK_FRONT_FACE_CLOCKWISE"/>
+    </enums>
+    <enums name="VkBlendFactor" type="enum" expand="VK_BLEND_FACTOR">
+        <enum value="0"     name="VK_BLEND_FACTOR_ZERO"/>
+        <enum value="1"     name="VK_BLEND_FACTOR_ONE"/>
+        <enum value="2"     name="VK_BLEND_FACTOR_SRC_COLOR"/>
+        <enum value="3"     name="VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR"/>
+        <enum value="4"     name="VK_BLEND_FACTOR_DST_COLOR"/>
+        <enum value="5"     name="VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR"/>
+        <enum value="6"     name="VK_BLEND_FACTOR_SRC_ALPHA"/>
+        <enum value="7"     name="VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA"/>
+        <enum value="8"     name="VK_BLEND_FACTOR_DST_ALPHA"/>
+        <enum value="9"     name="VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA"/>
+        <enum value="10"    name="VK_BLEND_FACTOR_CONSTANT_COLOR"/>
+        <enum value="11"    name="VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR"/>
+        <enum value="12"    name="VK_BLEND_FACTOR_CONSTANT_ALPHA"/>
+        <enum value="13"    name="VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA"/>
+        <enum value="14"    name="VK_BLEND_FACTOR_SRC_ALPHA_SATURATE"/>
+        <enum value="15"    name="VK_BLEND_FACTOR_SRC1_COLOR"/>
+        <enum value="16"    name="VK_BLEND_FACTOR_ONE_MINUS_SRC1_COLOR"/>
+        <enum value="17"    name="VK_BLEND_FACTOR_SRC1_ALPHA"/>
+        <enum value="18"    name="VK_BLEND_FACTOR_ONE_MINUS_SRC1_ALPHA"/>
+    </enums>
+    <enums name="VkBlendOp" type="enum" expand="VK_BLEND_OP">
+        <enum value="0"     name="VK_BLEND_OP_ADD"/>
+        <enum value="1"     name="VK_BLEND_OP_SUBTRACT"/>
+        <enum value="2"     name="VK_BLEND_OP_REVERSE_SUBTRACT"/>
+        <enum value="3"     name="VK_BLEND_OP_MIN"/>
+        <enum value="4"     name="VK_BLEND_OP_MAX"/>
+    </enums>
+    <enums name="VkStencilOp" type="enum" expand="VK_STENCIL_OP">
+        <enum value="0"     name="VK_STENCIL_OP_KEEP"/>
+        <enum value="1"     name="VK_STENCIL_OP_ZERO"/>
+        <enum value="2"     name="VK_STENCIL_OP_REPLACE"/>
+        <enum value="3"     name="VK_STENCIL_OP_INCREMENT_AND_CLAMP"/>
+        <enum value="4"     name="VK_STENCIL_OP_DECREMENT_AND_CLAMP"/>
+        <enum value="5"     name="VK_STENCIL_OP_INVERT"/>
+        <enum value="6"     name="VK_STENCIL_OP_INCREMENT_AND_WRAP"/>
+        <enum value="7"     name="VK_STENCIL_OP_DECREMENT_AND_WRAP"/>
+    </enums>
+    <enums name="VkLogicOp" type="enum" expand="VK_LOGIC_OP">
+        <enum value="0"     name="VK_LOGIC_OP_CLEAR"/>
+        <enum value="1"     name="VK_LOGIC_OP_AND"/>
+        <enum value="2"     name="VK_LOGIC_OP_AND_REVERSE"/>
+        <enum value="3"     name="VK_LOGIC_OP_COPY"/>
+        <enum value="4"     name="VK_LOGIC_OP_AND_INVERTED"/>
+        <enum value="5"     name="VK_LOGIC_OP_NO_OP"/>
+        <enum value="6"     name="VK_LOGIC_OP_XOR"/>
+        <enum value="7"     name="VK_LOGIC_OP_OR"/>
+        <enum value="8"     name="VK_LOGIC_OP_NOR"/>
+        <enum value="9"     name="VK_LOGIC_OP_EQUIVALENT"/>
+        <enum value="10"    name="VK_LOGIC_OP_INVERT"/>
+        <enum value="11"    name="VK_LOGIC_OP_OR_REVERSE"/>
+        <enum value="12"    name="VK_LOGIC_OP_COPY_INVERTED"/>
+        <enum value="13"    name="VK_LOGIC_OP_OR_INVERTED"/>
+        <enum value="14"    name="VK_LOGIC_OP_NAND"/>
+        <enum value="15"    name="VK_LOGIC_OP_SET"/>
+    </enums>
+    <enums name="VkInternalAllocationType" type="enum" expand="VK_INTERNAL_ALLOCATION_TYPE">
+        <enum value="0"     name="VK_INTERNAL_ALLOCATION_TYPE_EXECUTABLE"/>
+    </enums>
+    <enums name="VkSystemAllocationScope" type="enum" expand="VK_SYSTEM_ALLOCATION_SCOPE">
+        <enum value="0"     name="VK_SYSTEM_ALLOCATION_SCOPE_COMMAND"/>
+        <enum value="1"     name="VK_SYSTEM_ALLOCATION_SCOPE_OBJECT"/>
+        <enum value="2"     name="VK_SYSTEM_ALLOCATION_SCOPE_CACHE"/>
+        <enum value="3"     name="VK_SYSTEM_ALLOCATION_SCOPE_DEVICE"/>
+        <enum value="4"     name="VK_SYSTEM_ALLOCATION_SCOPE_INSTANCE"/>
+    </enums>
+    <enums name="VkPhysicalDeviceType" type="enum" expand="VK_PHYSICAL_DEVICE_TYPE">
+        <enum value="0"     name="VK_PHYSICAL_DEVICE_TYPE_OTHER"/>
+        <enum value="1"     name="VK_PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU"/>
+        <enum value="2"     name="VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU"/>
+        <enum value="3"     name="VK_PHYSICAL_DEVICE_TYPE_VIRTUAL_GPU"/>
+        <enum value="4"     name="VK_PHYSICAL_DEVICE_TYPE_CPU"/>
+    </enums>
+    <enums name="VkVertexInputRate" type="enum" expand="VK_VERTEX_INPUT_RATE">
+        <enum value="0"     name="VK_VERTEX_INPUT_RATE_VERTEX"/>
+        <enum value="1"     name="VK_VERTEX_INPUT_RATE_INSTANCE"/>
+    </enums>
+    <enums name="VkFormat" type="enum" expand="VK_FORMAT" comment="Vulkan format definitions">
+        <enum value="0"     name="VK_FORMAT_UNDEFINED"/>
+        <enum value="1"     name="VK_FORMAT_R4G4_UNORM_PACK8"/>
+        <enum value="2"     name="VK_FORMAT_R4G4B4A4_UNORM_PACK16"/>
+        <enum value="3"     name="VK_FORMAT_B4G4R4A4_UNORM_PACK16"/>
+        <enum value="4"     name="VK_FORMAT_R5G6B5_UNORM_PACK16"/>
+        <enum value="5"     name="VK_FORMAT_B5G6R5_UNORM_PACK16"/>
+        <enum value="6"     name="VK_FORMAT_R5G5B5A1_UNORM_PACK16"/>
+        <enum value="7"     name="VK_FORMAT_B5G5R5A1_UNORM_PACK16"/>
+        <enum value="8"     name="VK_FORMAT_A1R5G5B5_UNORM_PACK16"/>
+        <enum value="9"     name="VK_FORMAT_R8_UNORM"/>
+        <enum value="10"    name="VK_FORMAT_R8_SNORM"/>
+        <enum value="11"    name="VK_FORMAT_R8_USCALED"/>
+        <enum value="12"    name="VK_FORMAT_R8_SSCALED"/>
+        <enum value="13"    name="VK_FORMAT_R8_UINT"/>
+        <enum value="14"    name="VK_FORMAT_R8_SINT"/>
+        <enum value="15"    name="VK_FORMAT_R8_SRGB"/>
+        <enum value="16"    name="VK_FORMAT_R8G8_UNORM"/>
+        <enum value="17"    name="VK_FORMAT_R8G8_SNORM"/>
+        <enum value="18"    name="VK_FORMAT_R8G8_USCALED"/>
+        <enum value="19"    name="VK_FORMAT_R8G8_SSCALED"/>
+        <enum value="20"    name="VK_FORMAT_R8G8_UINT"/>
+        <enum value="21"    name="VK_FORMAT_R8G8_SINT"/>
+        <enum value="22"    name="VK_FORMAT_R8G8_SRGB"/>
+        <enum value="23"    name="VK_FORMAT_R8G8B8_UNORM"/>
+        <enum value="24"    name="VK_FORMAT_R8G8B8_SNORM"/>
+        <enum value="25"    name="VK_FORMAT_R8G8B8_USCALED"/>
+        <enum value="26"    name="VK_FORMAT_R8G8B8_SSCALED"/>
+        <enum value="27"    name="VK_FORMAT_R8G8B8_UINT"/>
+        <enum value="28"    name="VK_FORMAT_R8G8B8_SINT"/>
+        <enum value="29"    name="VK_FORMAT_R8G8B8_SRGB"/>
+        <enum value="30"    name="VK_FORMAT_B8G8R8_UNORM"/>
+        <enum value="31"    name="VK_FORMAT_B8G8R8_SNORM"/>
+        <enum value="32"    name="VK_FORMAT_B8G8R8_USCALED"/>
+        <enum value="33"    name="VK_FORMAT_B8G8R8_SSCALED"/>
+        <enum value="34"    name="VK_FORMAT_B8G8R8_UINT"/>
+        <enum value="35"    name="VK_FORMAT_B8G8R8_SINT"/>
+        <enum value="36"    name="VK_FORMAT_B8G8R8_SRGB"/>
+        <enum value="37"    name="VK_FORMAT_R8G8B8A8_UNORM"/>
+        <enum value="38"    name="VK_FORMAT_R8G8B8A8_SNORM"/>
+        <enum value="39"    name="VK_FORMAT_R8G8B8A8_USCALED"/>
+        <enum value="40"    name="VK_FORMAT_R8G8B8A8_SSCALED"/>
+        <enum value="41"    name="VK_FORMAT_R8G8B8A8_UINT"/>
+        <enum value="42"    name="VK_FORMAT_R8G8B8A8_SINT"/>
+        <enum value="43"    name="VK_FORMAT_R8G8B8A8_SRGB"/>
+        <enum value="44"    name="VK_FORMAT_B8G8R8A8_UNORM"/>
+        <enum value="45"    name="VK_FORMAT_B8G8R8A8_SNORM"/>
+        <enum value="46"    name="VK_FORMAT_B8G8R8A8_USCALED"/>
+        <enum value="47"    name="VK_FORMAT_B8G8R8A8_SSCALED"/>
+        <enum value="48"    name="VK_FORMAT_B8G8R8A8_UINT"/>
+        <enum value="49"    name="VK_FORMAT_B8G8R8A8_SINT"/>
+        <enum value="50"    name="VK_FORMAT_B8G8R8A8_SRGB"/>
+        <enum value="51"    name="VK_FORMAT_A8B8G8R8_UNORM_PACK32"/>
+        <enum value="52"    name="VK_FORMAT_A8B8G8R8_SNORM_PACK32"/>
+        <enum value="53"    name="VK_FORMAT_A8B8G8R8_USCALED_PACK32"/>
+        <enum value="54"    name="VK_FORMAT_A8B8G8R8_SSCALED_PACK32"/>
+        <enum value="55"    name="VK_FORMAT_A8B8G8R8_UINT_PACK32"/>
+        <enum value="56"    name="VK_FORMAT_A8B8G8R8_SINT_PACK32"/>
+        <enum value="57"    name="VK_FORMAT_A8B8G8R8_SRGB_PACK32"/>
+        <enum value="58"    name="VK_FORMAT_A2R10G10B10_UNORM_PACK32"/>
+        <enum value="59"    name="VK_FORMAT_A2R10G10B10_SNORM_PACK32"/>
+        <enum value="60"    name="VK_FORMAT_A2R10G10B10_USCALED_PACK32"/>
+        <enum value="61"    name="VK_FORMAT_A2R10G10B10_SSCALED_PACK32"/>
+        <enum value="62"    name="VK_FORMAT_A2R10G10B10_UINT_PACK32"/>
+        <enum value="63"    name="VK_FORMAT_A2R10G10B10_SINT_PACK32"/>
+        <enum value="64"    name="VK_FORMAT_A2B10G10R10_UNORM_PACK32"/>
+        <enum value="65"    name="VK_FORMAT_A2B10G10R10_SNORM_PACK32"/>
+        <enum value="66"    name="VK_FORMAT_A2B10G10R10_USCALED_PACK32"/>
+        <enum value="67"    name="VK_FORMAT_A2B10G10R10_SSCALED_PACK32"/>
+        <enum value="68"    name="VK_FORMAT_A2B10G10R10_UINT_PACK32"/>
+        <enum value="69"    name="VK_FORMAT_A2B10G10R10_SINT_PACK32"/>
+        <enum value="70"    name="VK_FORMAT_R16_UNORM"/>
+        <enum value="71"    name="VK_FORMAT_R16_SNORM"/>
+        <enum value="72"    name="VK_FORMAT_R16_USCALED"/>
+        <enum value="73"    name="VK_FORMAT_R16_SSCALED"/>
+        <enum value="74"    name="VK_FORMAT_R16_UINT"/>
+        <enum value="75"    name="VK_FORMAT_R16_SINT"/>
+        <enum value="76"    name="VK_FORMAT_R16_SFLOAT"/>
+        <enum value="77"    name="VK_FORMAT_R16G16_UNORM"/>
+        <enum value="78"    name="VK_FORMAT_R16G16_SNORM"/>
+        <enum value="79"    name="VK_FORMAT_R16G16_USCALED"/>
+        <enum value="80"    name="VK_FORMAT_R16G16_SSCALED"/>
+        <enum value="81"    name="VK_FORMAT_R16G16_UINT"/>
+        <enum value="82"    name="VK_FORMAT_R16G16_SINT"/>
+        <enum value="83"    name="VK_FORMAT_R16G16_SFLOAT"/>
+        <enum value="84"    name="VK_FORMAT_R16G16B16_UNORM"/>
+        <enum value="85"    name="VK_FORMAT_R16G16B16_SNORM"/>
+        <enum value="86"    name="VK_FORMAT_R16G16B16_USCALED"/>
+        <enum value="87"    name="VK_FORMAT_R16G16B16_SSCALED"/>
+        <enum value="88"    name="VK_FORMAT_R16G16B16_UINT"/>
+        <enum value="89"    name="VK_FORMAT_R16G16B16_SINT"/>
+        <enum value="90"    name="VK_FORMAT_R16G16B16_SFLOAT"/>
+        <enum value="91"    name="VK_FORMAT_R16G16B16A16_UNORM"/>
+        <enum value="92"    name="VK_FORMAT_R16G16B16A16_SNORM"/>
+        <enum value="93"    name="VK_FORMAT_R16G16B16A16_USCALED"/>
+        <enum value="94"    name="VK_FORMAT_R16G16B16A16_SSCALED"/>
+        <enum value="95"    name="VK_FORMAT_R16G16B16A16_UINT"/>
+        <enum value="96"    name="VK_FORMAT_R16G16B16A16_SINT"/>
+        <enum value="97"    name="VK_FORMAT_R16G16B16A16_SFLOAT"/>
+        <enum value="98"    name="VK_FORMAT_R32_UINT"/>
+        <enum value="99"    name="VK_FORMAT_R32_SINT"/>
+        <enum value="100"   name="VK_FORMAT_R32_SFLOAT"/>
+        <enum value="101"   name="VK_FORMAT_R32G32_UINT"/>
+        <enum value="102"   name="VK_FORMAT_R32G32_SINT"/>
+        <enum value="103"   name="VK_FORMAT_R32G32_SFLOAT"/>
+        <enum value="104"   name="VK_FORMAT_R32G32B32_UINT"/>
+        <enum value="105"   name="VK_FORMAT_R32G32B32_SINT"/>
+        <enum value="106"   name="VK_FORMAT_R32G32B32_SFLOAT"/>
+        <enum value="107"   name="VK_FORMAT_R32G32B32A32_UINT"/>
+        <enum value="108"   name="VK_FORMAT_R32G32B32A32_SINT"/>
+        <enum value="109"   name="VK_FORMAT_R32G32B32A32_SFLOAT"/>
+        <enum value="110"   name="VK_FORMAT_R64_UINT"/>
+        <enum value="111"   name="VK_FORMAT_R64_SINT"/>
+        <enum value="112"   name="VK_FORMAT_R64_SFLOAT"/>
+        <enum value="113"   name="VK_FORMAT_R64G64_UINT"/>
+        <enum value="114"   name="VK_FORMAT_R64G64_SINT"/>
+        <enum value="115"   name="VK_FORMAT_R64G64_SFLOAT"/>
+        <enum value="116"   name="VK_FORMAT_R64G64B64_UINT"/>
+        <enum value="117"   name="VK_FORMAT_R64G64B64_SINT"/>
+        <enum value="118"   name="VK_FORMAT_R64G64B64_SFLOAT"/>
+        <enum value="119"   name="VK_FORMAT_R64G64B64A64_UINT"/>
+        <enum value="120"   name="VK_FORMAT_R64G64B64A64_SINT"/>
+        <enum value="121"   name="VK_FORMAT_R64G64B64A64_SFLOAT"/>
+        <enum value="122"   name="VK_FORMAT_B10G11R11_UFLOAT_PACK32"/>
+        <enum value="123"   name="VK_FORMAT_E5B9G9R9_UFLOAT_PACK32"/>
+        <enum value="124"   name="VK_FORMAT_D16_UNORM"/>
+        <enum value="125"   name="VK_FORMAT_X8_D24_UNORM_PACK32"/>
+        <enum value="126"   name="VK_FORMAT_D32_SFLOAT"/>
+        <enum value="127"   name="VK_FORMAT_S8_UINT"/>
+        <enum value="128"   name="VK_FORMAT_D16_UNORM_S8_UINT"/>
+        <enum value="129"   name="VK_FORMAT_D24_UNORM_S8_UINT"/>
+        <enum value="130"   name="VK_FORMAT_D32_SFLOAT_S8_UINT"/>
+        <enum value="131"   name="VK_FORMAT_BC1_RGB_UNORM_BLOCK"/>
+        <enum value="132"   name="VK_FORMAT_BC1_RGB_SRGB_BLOCK"/>
+        <enum value="133"   name="VK_FORMAT_BC1_RGBA_UNORM_BLOCK"/>
+        <enum value="134"   name="VK_FORMAT_BC1_RGBA_SRGB_BLOCK"/>
+        <enum value="135"   name="VK_FORMAT_BC2_UNORM_BLOCK"/>
+        <enum value="136"   name="VK_FORMAT_BC2_SRGB_BLOCK"/>
+        <enum value="137"   name="VK_FORMAT_BC3_UNORM_BLOCK"/>
+        <enum value="138"   name="VK_FORMAT_BC3_SRGB_BLOCK"/>
+        <enum value="139"   name="VK_FORMAT_BC4_UNORM_BLOCK"/>
+        <enum value="140"   name="VK_FORMAT_BC4_SNORM_BLOCK"/>
+        <enum value="141"   name="VK_FORMAT_BC5_UNORM_BLOCK"/>
+        <enum value="142"   name="VK_FORMAT_BC5_SNORM_BLOCK"/>
+        <enum value="143"   name="VK_FORMAT_BC6H_UFLOAT_BLOCK"/>
+        <enum value="144"   name="VK_FORMAT_BC6H_SFLOAT_BLOCK"/>
+        <enum value="145"   name="VK_FORMAT_BC7_UNORM_BLOCK"/>
+        <enum value="146"   name="VK_FORMAT_BC7_SRGB_BLOCK"/>
+        <enum value="147"   name="VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK"/>
+        <enum value="148"   name="VK_FORMAT_ETC2_R8G8B8_SRGB_BLOCK"/>
+        <enum value="149"   name="VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK"/>
+        <enum value="150"   name="VK_FORMAT_ETC2_R8G8B8A1_SRGB_BLOCK"/>
+        <enum value="151"   name="VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK"/>
+        <enum value="152"   name="VK_FORMAT_ETC2_R8G8B8A8_SRGB_BLOCK"/>
+        <enum value="153"   name="VK_FORMAT_EAC_R11_UNORM_BLOCK"/>
+        <enum value="154"   name="VK_FORMAT_EAC_R11_SNORM_BLOCK"/>
+        <enum value="155"   name="VK_FORMAT_EAC_R11G11_UNORM_BLOCK"/>
+        <enum value="156"   name="VK_FORMAT_EAC_R11G11_SNORM_BLOCK"/>
+        <enum value="157"   name="VK_FORMAT_ASTC_4x4_UNORM_BLOCK"/>
+        <enum value="158"   name="VK_FORMAT_ASTC_4x4_SRGB_BLOCK"/>
+        <enum value="159"   name="VK_FORMAT_ASTC_5x4_UNORM_BLOCK"/>
+        <enum value="160"   name="VK_FORMAT_ASTC_5x4_SRGB_BLOCK"/>
+        <enum value="161"   name="VK_FORMAT_ASTC_5x5_UNORM_BLOCK"/>
+        <enum value="162"   name="VK_FORMAT_ASTC_5x5_SRGB_BLOCK"/>
+        <enum value="163"   name="VK_FORMAT_ASTC_6x5_UNORM_BLOCK"/>
+        <enum value="164"   name="VK_FORMAT_ASTC_6x5_SRGB_BLOCK"/>
+        <enum value="165"   name="VK_FORMAT_ASTC_6x6_UNORM_BLOCK"/>
+        <enum value="166"   name="VK_FORMAT_ASTC_6x6_SRGB_BLOCK"/>
+        <enum value="167"   name="VK_FORMAT_ASTC_8x5_UNORM_BLOCK"/>
+        <enum value="168"   name="VK_FORMAT_ASTC_8x5_SRGB_BLOCK"/>
+        <enum value="169"   name="VK_FORMAT_ASTC_8x6_UNORM_BLOCK"/>
+        <enum value="170"   name="VK_FORMAT_ASTC_8x6_SRGB_BLOCK"/>
+        <enum value="171"   name="VK_FORMAT_ASTC_8x8_UNORM_BLOCK"/>
+        <enum value="172"   name="VK_FORMAT_ASTC_8x8_SRGB_BLOCK"/>
+        <enum value="173"   name="VK_FORMAT_ASTC_10x5_UNORM_BLOCK"/>
+        <enum value="174"   name="VK_FORMAT_ASTC_10x5_SRGB_BLOCK"/>
+        <enum value="175"   name="VK_FORMAT_ASTC_10x6_UNORM_BLOCK"/>
+        <enum value="176"   name="VK_FORMAT_ASTC_10x6_SRGB_BLOCK"/>
+        <enum value="177"   name="VK_FORMAT_ASTC_10x8_UNORM_BLOCK"/>
+        <enum value="178"   name="VK_FORMAT_ASTC_10x8_SRGB_BLOCK"/>
+        <enum value="179"   name="VK_FORMAT_ASTC_10x10_UNORM_BLOCK"/>
+        <enum value="180"   name="VK_FORMAT_ASTC_10x10_SRGB_BLOCK"/>
+        <enum value="181"   name="VK_FORMAT_ASTC_12x10_UNORM_BLOCK"/>
+        <enum value="182"   name="VK_FORMAT_ASTC_12x10_SRGB_BLOCK"/>
+        <enum value="183"   name="VK_FORMAT_ASTC_12x12_UNORM_BLOCK"/>
+        <enum value="184"   name="VK_FORMAT_ASTC_12x12_SRGB_BLOCK"/>
+    </enums>
+    <enums name="VkStructureType" type="enum" expand="VK_STRUCTURE_TYPE" comment="Structure type enumerant">
+        <enum value="0"     name="VK_STRUCTURE_TYPE_APPLICATION_INFO"/>
+        <enum value="1"     name="VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO"/>
+        <enum value="2"     name="VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO"/>
+        <enum value="3"     name="VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO"/>
+        <enum value="4"     name="VK_STRUCTURE_TYPE_SUBMIT_INFO"/>
+        <enum value="5"     name="VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO"/>
+        <enum value="6"     name="VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE"/>
+        <enum value="7"     name="VK_STRUCTURE_TYPE_BIND_SPARSE_INFO"/>
+        <enum value="8"     name="VK_STRUCTURE_TYPE_FENCE_CREATE_INFO"/>
+        <enum value="9"     name="VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO"/>
+        <enum value="10"    name="VK_STRUCTURE_TYPE_EVENT_CREATE_INFO"/>
+        <enum value="11"    name="VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO"/>
+        <enum value="12"    name="VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO"/>
+        <enum value="13"    name="VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO"/>
+        <enum value="14"    name="VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO"/>
+        <enum value="15"    name="VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO"/>
+        <enum value="16"    name="VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO"/>
+        <enum value="17"    name="VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO"/>
+        <enum value="18"    name="VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO"/>
+        <enum value="19"    name="VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO"/>
+        <enum value="20"    name="VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO"/>
+        <enum value="21"    name="VK_STRUCTURE_TYPE_PIPELINE_TESSELLATION_STATE_CREATE_INFO"/>
+        <enum value="22"    name="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO"/>
+        <enum value="23"    name="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO"/>
+        <enum value="24"    name="VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO"/>
+        <enum value="25"    name="VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO"/>
+        <enum value="26"    name="VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO"/>
+        <enum value="27"    name="VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO"/>
+        <enum value="28"    name="VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO"/>
+        <enum value="29"    name="VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO"/>
+        <enum value="30"    name="VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO"/>
+        <enum value="31"    name="VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO"/>
+        <enum value="32"    name="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO"/>
+        <enum value="33"    name="VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO"/>
+        <enum value="34"    name="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO"/>
+        <enum value="35"    name="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET"/>
+        <enum value="36"    name="VK_STRUCTURE_TYPE_COPY_DESCRIPTOR_SET"/>
+        <enum value="37"    name="VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO"/>
+        <enum value="38"    name="VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO"/>
+        <enum value="39"    name="VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO"/>
+        <enum value="40"    name="VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO"/>
+        <enum value="41"    name="VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO"/>
+        <enum value="42"    name="VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO"/>
+        <enum value="43"    name="VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO"/>
+        <enum value="44"    name="VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER"/>
+        <enum value="45"    name="VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER"/>
+        <enum value="46"    name="VK_STRUCTURE_TYPE_MEMORY_BARRIER"/>
+        <enum value="47"    name="VK_STRUCTURE_TYPE_LOADER_INSTANCE_CREATE_INFO"/> <!-- Reserved for internal use by the loader, layers, and ICDs -->
+        <enum value="48"    name="VK_STRUCTURE_TYPE_LOADER_DEVICE_CREATE_INFO"/> <!-- Reserved for internal use by the loader, layers, and ICDs -->
+    </enums>
+    <enums name="VkSubpassContents" type="enum" expand="VK_SUBPASS_CONTENTS">
+        <enum value="0"     name="VK_SUBPASS_CONTENTS_INLINE"/>
+        <enum value="1"     name="VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS"/>
+    </enums>
+    <enums name="VkResult" type="enum" expand="VK_RESULT" comment="Error and return codes">
+        <!-- Return codes for successful operation execution (positive values) -->
+        <enum value="0"     name="VK_SUCCESS" comment="Command completed successfully"/>
+        <enum value="1"     name="VK_NOT_READY" comment="A fence or query has not yet completed"/>
+        <enum value="2"     name="VK_TIMEOUT" comment="A wait operation has not completed in the specified time"/>
+        <enum value="3"     name="VK_EVENT_SET" comment="An event is signaled"/>
+        <enum value="4"     name="VK_EVENT_RESET" comment="An event is unsignalled"/>
+        <enum value="5"     name="VK_INCOMPLETE" comment="A return array was too small for the resul"/>
+        <!-- Error codes (negative values) -->
+        <enum value="-1"    name="VK_ERROR_OUT_OF_HOST_MEMORY" comment="A host memory allocation has failed"/>
+        <enum value="-2"    name="VK_ERROR_OUT_OF_DEVICE_MEMORY" comment="A device memory allocation has failed"/>
+        <enum value="-3"    name="VK_ERROR_INITIALIZATION_FAILED" comment="The logical device has been lost. See &lt;&lt;devsandqueues-lost-device&gt;&gt;"/>
+        <enum value="-4"    name="VK_ERROR_DEVICE_LOST" comment="Initialization of a object has failed"/>
+        <enum value="-5"    name="VK_ERROR_MEMORY_MAP_FAILED" comment="Mapping of a memory object has failed"/>
+        <enum value="-6"    name="VK_ERROR_LAYER_NOT_PRESENT" comment="Layer specified does not exist"/>
+        <enum value="-7"    name="VK_ERROR_EXTENSION_NOT_PRESENT" comment="Extension specified does not exist"/>
+        <enum value="-8"    name="VK_ERROR_FEATURE_NOT_PRESENT" comment="Requested feature is not available on this device"/>
+        <enum value="-9"    name="VK_ERROR_INCOMPATIBLE_DRIVER" comment="Unable to find a Vulkan driver"/>
+        <enum value="-10"   name="VK_ERROR_TOO_MANY_OBJECTS" comment="Too many objects of the type have already been created"/>
+        <enum value="-11"   name="VK_ERROR_FORMAT_NOT_SUPPORTED" comment="Requested format is not supported on this device"/>
+            <unused start="-12"/>
+    </enums>
+    <enums name="VkDynamicState" type="enum" expand="VK_DYNAMIC_STATE">
+        <enum value="0"    name="VK_DYNAMIC_STATE_VIEWPORT"/>
+        <enum value="1"    name="VK_DYNAMIC_STATE_SCISSOR"/>
+        <enum value="2"    name="VK_DYNAMIC_STATE_LINE_WIDTH"/>
+        <enum value="3"    name="VK_DYNAMIC_STATE_DEPTH_BIAS"/>
+        <enum value="4"    name="VK_DYNAMIC_STATE_BLEND_CONSTANTS"/>
+        <enum value="5"    name="VK_DYNAMIC_STATE_DEPTH_BOUNDS"/>
+        <enum value="6"    name="VK_DYNAMIC_STATE_STENCIL_COMPARE_MASK"/>
+        <enum value="7"    name="VK_DYNAMIC_STATE_STENCIL_WRITE_MASK"/>
+        <enum value="8"    name="VK_DYNAMIC_STATE_STENCIL_REFERENCE"/>
+    </enums>
+
+    <!-- Flags -->
+    <enums name="VkQueueFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_QUEUE_GRAPHICS_BIT"                             comment="Queue supports graphics operations"/>
+        <enum bitpos="1"    name="VK_QUEUE_COMPUTE_BIT"                              comment="Queue supports compute operations"/>
+        <enum bitpos="2"    name="VK_QUEUE_TRANSFER_BIT"                             comment="Queue supports transfer operations"/>
+        <enum bitpos="3"    name="VK_QUEUE_SPARSE_BINDING_BIT"                       comment="Queue supports sparse resource memory management operations"/>
+    </enums>
+    <enums name="VkMemoryPropertyFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT"              comment="If otherwise stated, then allocate memory on device"/>
+        <enum bitpos="1"    name="VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT"               comment="Memory is mappable by host"/>
+        <enum bitpos="2"    name="VK_MEMORY_PROPERTY_HOST_COHERENT_BIT"              comment="Memory will have i/o coherency. If not set, application may need to use vkFlushMappedMemoryRanges and vkInvalidateMappedMemoryRanges to flush/invalidate host cache"/>
+        <enum bitpos="3"    name="VK_MEMORY_PROPERTY_HOST_CACHED_BIT"                comment="Memory will be cached by the host"/>
+        <enum bitpos="4"    name="VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT"           comment="Memory may be allocated by the driver when it is required"/>
+    </enums>
+    <enums name="VkMemoryHeapFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_MEMORY_HEAP_DEVICE_LOCAL_BIT"                   comment="If set, heap represents device memory"/>
+    </enums>
+    <enums name="VkAccessFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_ACCESS_INDIRECT_COMMAND_READ_BIT"               comment="Controls coherency of indirect command reads"/>
+        <enum bitpos="1"    name="VK_ACCESS_INDEX_READ_BIT"                          comment="Controls coherency of index reads"/>
+        <enum bitpos="2"    name="VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT"               comment="Controls coherency of vertex attribute reads"/>
+        <enum bitpos="3"    name="VK_ACCESS_UNIFORM_READ_BIT"                        comment="Controls coherency of uniform buffer reads"/>
+        <enum bitpos="4"    name="VK_ACCESS_INPUT_ATTACHMENT_READ_BIT"               comment="Controls coherency of input attachment reads"/>
+        <enum bitpos="5"    name="VK_ACCESS_SHADER_READ_BIT"                         comment="Controls coherency of shader reads"/>
+        <enum bitpos="6"    name="VK_ACCESS_SHADER_WRITE_BIT"                        comment="Controls coherency of shader writes"/>
+        <enum bitpos="7"    name="VK_ACCESS_COLOR_ATTACHMENT_READ_BIT"               comment="Controls coherency of color attachment reads"/>
+        <enum bitpos="8"    name="VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT"              comment="Controls coherency of color attachment writes"/>
+        <enum bitpos="9"    name="VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_READ_BIT"       comment="Controls coherency of depth/stencil attachment reads"/>
+        <enum bitpos="10"   name="VK_ACCESS_DEPTH_STENCIL_ATTACHMENT_WRITE_BIT"      comment="Controls coherency of depth/stencil attachment writes"/>
+        <enum bitpos="11"   name="VK_ACCESS_TRANSFER_READ_BIT"                       comment="Controls coherency of transfer reads"/>
+        <enum bitpos="12"   name="VK_ACCESS_TRANSFER_WRITE_BIT"                      comment="Controls coherency of transfer writes"/>
+        <enum bitpos="13"   name="VK_ACCESS_HOST_READ_BIT"                           comment="Controls coherency of host reads"/>
+        <enum bitpos="14"   name="VK_ACCESS_HOST_WRITE_BIT"                          comment="Controls coherency of host writes"/>
+        <enum bitpos="15"   name="VK_ACCESS_MEMORY_READ_BIT"                         comment="Controls coherency of memory reads"/>
+        <enum bitpos="16"   name="VK_ACCESS_MEMORY_WRITE_BIT"                        comment="Controls coherency of memory writes"/>
+    </enums>
+    <enums name="VkBufferUsageFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_BUFFER_USAGE_TRANSFER_SRC_BIT"               comment="Can be used as a source of transfer operations"/>
+        <enum bitpos="1"    name="VK_BUFFER_USAGE_TRANSFER_DST_BIT"          comment="Can be used as a destination of transfer operations"/>
+        <enum bitpos="2"    name="VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT"          comment="Can be used as TBO"/>
+        <enum bitpos="3"    name="VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT"          comment="Can be used as IBO"/>
+        <enum bitpos="4"    name="VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT"                comment="Can be used as UBO"/>
+        <enum bitpos="5"    name="VK_BUFFER_USAGE_STORAGE_BUFFER_BIT"                comment="Can be used as SSBO"/>
+        <enum bitpos="6"    name="VK_BUFFER_USAGE_INDEX_BUFFER_BIT"                  comment="Can be used as source of fixed-function index fetch (index buffer)"/>
+        <enum bitpos="7"    name="VK_BUFFER_USAGE_VERTEX_BUFFER_BIT"                 comment="Can be used as source of fixed-function vertex fetch (VBO)"/>
+        <enum bitpos="8"    name="VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT"               comment="Can be the source of indirect parameters (e.g. indirect buffer, parameter buffer)"/>
+    </enums>
+    <enums name="VkBufferCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_BUFFER_CREATE_SPARSE_BINDING_BIT"               comment="Buffer should support sparse backing"/>
+        <enum bitpos="1"    name="VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT"             comment="Buffer should support sparse backing with partial residency"/>
+        <enum bitpos="2"    name="VK_BUFFER_CREATE_SPARSE_ALIASED_BIT"               comment="Buffer should support constent data access to physical memory blocks mapped into multiple locations of sparse buffers"/>
+    </enums>
+    <enums name="VkShaderStageFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_SHADER_STAGE_VERTEX_BIT"/>
+        <enum bitpos="1"    name="VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT"/>
+        <enum bitpos="2"    name="VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT"/>
+        <enum bitpos="3"    name="VK_SHADER_STAGE_GEOMETRY_BIT"/>
+        <enum bitpos="4"    name="VK_SHADER_STAGE_FRAGMENT_BIT"/>
+        <enum bitpos="5"    name="VK_SHADER_STAGE_COMPUTE_BIT"/>
+        <enum value="0x1F"  name="VK_SHADER_STAGE_ALL_GRAPHICS"/>
+        <enum value="0x7FFFFFFF" name="VK_SHADER_STAGE_ALL"/>
+    </enums>
+    <enums name="VkImageUsageFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_IMAGE_USAGE_TRANSFER_SRC_BIT"                comment="Can be used as a source of transfer operations"/>
+        <enum bitpos="1"    name="VK_IMAGE_USAGE_TRANSFER_DST_BIT"           comment="Can be used as a destination of transfer operations"/>
+        <enum bitpos="2"    name="VK_IMAGE_USAGE_SAMPLED_BIT"                        comment="Can be sampled from (SAMPLED_IMAGE and COMBINED_IMAGE_SAMPLER descriptor types)"/>
+        <enum bitpos="3"    name="VK_IMAGE_USAGE_STORAGE_BIT"                        comment="Can be used as storage image (STORAGE_IMAGE descriptor type)"/>
+        <enum bitpos="4"    name="VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT"               comment="Can be used as framebuffer color attachment"/>
+        <enum bitpos="5"    name="VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT"       comment="Can be used as framebuffer depth/stencil attachment"/>
+        <enum bitpos="6"    name="VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT"           comment="Image data not needed outside of rendering"/>
+        <enum bitpos="7"    name="VK_IMAGE_USAGE_INPUT_ATTACHMENT_BIT"               comment="Can be used as framebuffer input attachment"/>
+    </enums>
+    <enums name="VkImageCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_IMAGE_CREATE_SPARSE_BINDING_BIT"                comment="Image should support sparse backing"/>
+        <enum bitpos="1"    name="VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT"              comment="Image should support sparse backing with partial residency"/>
+        <enum bitpos="2"    name="VK_IMAGE_CREATE_SPARSE_ALIASED_BIT"                comment="Image should support constent data access to physical memory blocks mapped into multiple locations of sparse images"/>
+        <enum bitpos="3"    name="VK_IMAGE_CREATE_MUTABLE_FORMAT_BIT"                comment="Allows image views to have different format than the base image"/>
+        <enum bitpos="4"    name="VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT"               comment="Allows creating image views with cube type from the created image"/>
+    </enums>
+    <enums name="VkPipelineCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_PIPELINE_CREATE_DISABLE_OPTIMIZATION_BIT"/>
+        <enum bitpos="1"    name="VK_PIPELINE_CREATE_ALLOW_DERIVATIVES_BIT"/>
+        <enum bitpos="2"    name="VK_PIPELINE_CREATE_DERIVATIVE_BIT"/>
+    </enums>
+    <enums name="VkColorComponentFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_COLOR_COMPONENT_R_BIT"/>
+        <enum bitpos="1"    name="VK_COLOR_COMPONENT_G_BIT"/>
+        <enum bitpos="2"    name="VK_COLOR_COMPONENT_B_BIT"/>
+        <enum bitpos="3"    name="VK_COLOR_COMPONENT_A_BIT"/>
+    </enums>
+    <enums name="VkFenceCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_FENCE_CREATE_SIGNALED_BIT"/>
+    </enums>
+    <enums name="VkFormatFeatureFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT"               comment="Format can be used for sampled images (SAMPLED_IMAGE and COMBINED_IMAGE_SAMPLER descriptor types)"/>
+        <enum bitpos="1"    name="VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT"               comment="Format can be used for storage images (STORAGE_IMAGE descriptor type)"/>
+        <enum bitpos="2"    name="VK_FORMAT_FEATURE_STORAGE_IMAGE_ATOMIC_BIT"        comment="Format supports atomic operations in case it's used for storage images"/>
+        <enum bitpos="3"    name="VK_FORMAT_FEATURE_UNIFORM_TEXEL_BUFFER_BIT"        comment="Format can be used for uniform texel buffers (TBOs)"/>
+        <enum bitpos="4"    name="VK_FORMAT_FEATURE_STORAGE_TEXEL_BUFFER_BIT"        comment="Format can be used for storage texel buffers (IBOs)"/>
+        <enum bitpos="5"    name="VK_FORMAT_FEATURE_STORAGE_TEXEL_BUFFER_ATOMIC_BIT" comment="Format supports atomic operations in case it's used for storage texel buffers"/>
+        <enum bitpos="6"    name="VK_FORMAT_FEATURE_VERTEX_BUFFER_BIT"               comment="Format can be used for vertex buffers (VBOs)"/>
+        <enum bitpos="7"    name="VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT"            comment="Format can be used for color attachment images"/>
+        <enum bitpos="8"    name="VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BLEND_BIT"      comment="Format supports blending in case it's used for color attachment images"/>
+        <enum bitpos="9"    name="VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT"    comment="Format can be used for depth/stencil attachment images"/>
+        <enum bitpos="10"   name="VK_FORMAT_FEATURE_BLIT_SRC_BIT"                    comment="Format can be used as the source image of blits with vkCmdBlitImage"/>
+        <enum bitpos="11"   name="VK_FORMAT_FEATURE_BLIT_DST_BIT"                    comment="Format can be used as the destination image of blits with vkCmdBlitImage"/>
+    </enums>
+    <enums name="VkQueryControlFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_QUERY_CONTROL_PRECISE_BIT"                      comment="Require precise results to be collected by the query"/>
+    </enums>
+    <enums name="VkQueryResultFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_QUERY_RESULT_64_BIT"                            comment="Results of the queries are written to the destination buffer as 64-bit values"/>
+        <enum bitpos="1"    name="VK_QUERY_RESULT_WAIT_BIT"                          comment="Results of the queries are waited on before proceeding with the result copy"/>
+        <enum bitpos="2"    name="VK_QUERY_RESULT_WITH_AVAILABILITY_BIT"             comment="Besides the results of the query, the availability of the results is also written"/>
+        <enum bitpos="3"    name="VK_QUERY_RESULT_PARTIAL_BIT"                       comment="Copy the partial results of the query even if the final results aren't available"/>
+    </enums>
+    <enums name="VkCommandBufferUsageFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT"/>
+        <enum bitpos="1"    name="VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT"/>
+        <enum bitpos="2"    name="VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT"          comment="Command buffer may be submitted/executed more than once simultaneously"/>
+    </enums>
+    <enums name="VkQueryPipelineStatisticFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_QUERY_PIPELINE_STATISTIC_INPUT_ASSEMBLY_VERTICES_BIT"                    comment="Optional"/>
+        <enum bitpos="1"    name="VK_QUERY_PIPELINE_STATISTIC_INPUT_ASSEMBLY_PRIMITIVES_BIT"                  comment="Optional"/>
+        <enum bitpos="2"    name="VK_QUERY_PIPELINE_STATISTIC_VERTEX_SHADER_INVOCATIONS_BIT"                  comment="Optional"/>
+        <enum bitpos="3"    name="VK_QUERY_PIPELINE_STATISTIC_GEOMETRY_SHADER_INVOCATIONS_BIT"                comment="Optional"/>
+        <enum bitpos="4"    name="VK_QUERY_PIPELINE_STATISTIC_GEOMETRY_SHADER_PRIMITIVES_BIT"                 comment="Optional"/>
+        <enum bitpos="5"    name="VK_QUERY_PIPELINE_STATISTIC_CLIPPING_INVOCATIONS_BIT"                       comment="Optional"/>
+        <enum bitpos="6"    name="VK_QUERY_PIPELINE_STATISTIC_CLIPPING_PRIMITIVES_BIT"                        comment="Optional"/>
+        <enum bitpos="7"    name="VK_QUERY_PIPELINE_STATISTIC_FRAGMENT_SHADER_INVOCATIONS_BIT"                comment="Optional"/>
+        <enum bitpos="8"    name="VK_QUERY_PIPELINE_STATISTIC_TESSELLATION_CONTROL_SHADER_PATCHES_BIT"        comment="Optional"/>
+        <enum bitpos="9"    name="VK_QUERY_PIPELINE_STATISTIC_TESSELLATION_EVALUATION_SHADER_INVOCATIONS_BIT" comment="Optional"/>
+        <enum bitpos="10"   name="VK_QUERY_PIPELINE_STATISTIC_COMPUTE_SHADER_INVOCATIONS_BIT"                 comment="Optional"/>
+    </enums>
+    <enums name="VkImageAspectFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_IMAGE_ASPECT_COLOR_BIT"/>
+        <enum bitpos="1"    name="VK_IMAGE_ASPECT_DEPTH_BIT"/>
+        <enum bitpos="2"    name="VK_IMAGE_ASPECT_STENCIL_BIT"/>
+        <enum bitpos="3"    name="VK_IMAGE_ASPECT_METADATA_BIT"/>
+    </enums>
+    <enums name="VkSparseImageFormatFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_SPARSE_IMAGE_FORMAT_SINGLE_MIPTAIL_BIT"            comment="Image uses a single miptail region for all array layers"/>
+        <enum bitpos="1"    name="VK_SPARSE_IMAGE_FORMAT_ALIGNED_MIP_SIZE_BIT"          comment="Image requires mip levels to be an exact multiple of the sparse image block size for non-miptail levels."/>
+        <enum bitpos="2"    name="VK_SPARSE_IMAGE_FORMAT_NONSTANDARD_BLOCK_SIZE_BIT"         comment="Image uses a non-standard sparse block size"/>
+    </enums>
+    <enums name="VkSparseMemoryBindFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_SPARSE_MEMORY_BIND_METADATA_BIT"                comment="Operation binds resource metadata to memory"/>
+    </enums>
+    <enums name="VkPipelineStageFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT"                 comment="Before subsequent commands are processed"/>
+        <enum bitpos="1"    name="VK_PIPELINE_STAGE_DRAW_INDIRECT_BIT"               comment="Draw/DispatchIndirect command fetch"/>
+        <enum bitpos="2"    name="VK_PIPELINE_STAGE_VERTEX_INPUT_BIT"                comment="Vertex/index fetch"/>
+        <enum bitpos="3"    name="VK_PIPELINE_STAGE_VERTEX_SHADER_BIT"               comment="Vertex shading"/>
+        <enum bitpos="4"    name="VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT"         comment="Tessellation control shading"/>
+        <enum bitpos="5"    name="VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT"      comment="Tessellation evaluation shading"/>
+        <enum bitpos="6"    name="VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT"             comment="Geometry shading"/>
+        <enum bitpos="7"    name="VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT"             comment="Fragment shading"/>
+        <enum bitpos="8"    name="VK_PIPELINE_STAGE_EARLY_FRAGMENT_TESTS_BIT"        comment="Early fragment (depth and stencil) tests"/>
+        <enum bitpos="9"    name="VK_PIPELINE_STAGE_LATE_FRAGMENT_TESTS_BIT"         comment="Late fragment (depth and stencil) tests"/>
+        <enum bitpos="10"   name="VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT"     comment="Color attachment writes"/>
+        <enum bitpos="11"   name="VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT"              comment="Compute shading"/>
+        <enum bitpos="12"   name="VK_PIPELINE_STAGE_TRANSFER_BIT"                    comment="Transfer/copy operations"/>
+        <enum bitpos="13"   name="VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT"              comment="After previous commands have completed"/>
+        <enum bitpos="14"   name="VK_PIPELINE_STAGE_HOST_BIT"                        comment="Indicates host (CPU) is a source/sink of the dependency"/>
+        <enum bitpos="15"   name="VK_PIPELINE_STAGE_ALL_GRAPHICS_BIT"                comment="All stages of the graphics pipeline"/>
+        <enum bitpos="16"   name="VK_PIPELINE_STAGE_ALL_COMMANDS_BIT"                comment="All stages supported on the queue"/>
+    </enums>
+    <enums name="VkCommandPoolCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_COMMAND_POOL_CREATE_TRANSIENT_BIT"                  comment="Command buffers have a short lifetime"/>
+        <enum bitpos="1"    name="VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT"       comment="Command buffers may release their memory individually"/>
+    </enums>
+    <enums name="VkCommandPoolResetFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_COMMAND_POOL_RESET_RELEASE_RESOURCES_BIT"           comment="Release resources owned by the pool"/>
+    </enums>
+    <enums name="VkCommandBufferResetFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_COMMAND_BUFFER_RESET_RELEASE_RESOURCES_BIT"         comment="Release resources owned by the buffer"/>
+    </enums>
+    <enums name="VkSampleCountFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_SAMPLE_COUNT_1_BIT"                             comment="Sample count 1 supported"/>
+        <enum bitpos="1"    name="VK_SAMPLE_COUNT_2_BIT"                             comment="Sample count 2 supported"/>
+        <enum bitpos="2"    name="VK_SAMPLE_COUNT_4_BIT"                             comment="Sample count 4 supported"/>
+        <enum bitpos="3"    name="VK_SAMPLE_COUNT_8_BIT"                             comment="Sample count 8 supported"/>
+        <enum bitpos="4"    name="VK_SAMPLE_COUNT_16_BIT"                            comment="Sample count 16 supported"/>
+        <enum bitpos="5"    name="VK_SAMPLE_COUNT_32_BIT"                            comment="Sample count 32 supported"/>
+        <enum bitpos="6"    name="VK_SAMPLE_COUNT_64_BIT"                            comment="Sample count 64 supported"/>
+    </enums>
+    <enums name="VkAttachmentDescriptionFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_ATTACHMENT_DESCRIPTION_MAY_ALIAS_BIT"           comment="The attachment may alias physical memory of another attachment in the same render pass"/>
+    </enums>
+    <enums name="VkStencilFaceFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_STENCIL_FACE_FRONT_BIT"                         comment="Front face"/>
+        <enum bitpos="1"    name="VK_STENCIL_FACE_BACK_BIT"                          comment="Back face"/>
+        <enum value="0x3"   name="VK_STENCIL_FRONT_AND_BACK"                         comment="Front and back faces"/>
+    </enums>
+    <enums name="VkDescriptorPoolCreateFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT" comment="Descriptor sets may be freed individually"/>
+    </enums>
+    <enums name="VkDependencyFlagBits" type="bitmask">
+        <enum bitpos="0"    name="VK_DEPENDENCY_BY_REGION_BIT"                       comment="Dependency is per pixel region "/>
+    </enums>
+        <!-- WSI extensions -->
+    <enums name="VkPresentModeKHR" type="enum" expand="VK_PRESENT_MODE">
+        <enum value="0"     name="VK_PRESENT_MODE_IMMEDIATE_KHR"/>
+        <enum value="1"     name="VK_PRESENT_MODE_MAILBOX_KHR"/>
+        <enum value="2"     name="VK_PRESENT_MODE_FIFO_KHR"/>
+        <enum value="3"     name="VK_PRESENT_MODE_FIFO_RELAXED_KHR"/>
+    </enums>
+    <enums name="VkColorSpaceKHR" type="enum" expand="VK_COLORSPACE">
+        <enum value="0"     name="VK_COLORSPACE_SRGB_NONLINEAR_KHR"/>
+    </enums>
+    <enums name="VkDisplayPlaneAlphaFlagBitsKHR" type="bitmask">
+        <enum bitpos="0"    name="VK_DISPLAY_PLANE_ALPHA_OPAQUE_BIT_KHR"/>
+        <enum bitpos="1"    name="VK_DISPLAY_PLANE_ALPHA_GLOBAL_BIT_KHR"/>
+        <enum bitpos="2"    name="VK_DISPLAY_PLANE_ALPHA_PER_PIXEL_BIT_KHR"/>
+        <enum bitpos="3"    name="VK_DISPLAY_PLANE_ALPHA_PER_PIXEL_PREMULTIPLIED_BIT_KHR"/>
+    </enums>
+    <enums name="VkCompositeAlphaFlagBitsKHR" type="bitmask">
+        <enum bitpos="0"    name="VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR"/>
+        <enum bitpos="1"    name="VK_COMPOSITE_ALPHA_PRE_MULTIPLIED_BIT_KHR"/>
+        <enum bitpos="2"    name="VK_COMPOSITE_ALPHA_POST_MULTIPLIED_BIT_KHR"/>
+        <enum bitpos="3"    name="VK_COMPOSITE_ALPHA_INHERIT_BIT_KHR"/>
+    </enums>
+    <enums name="VkSurfaceTransformFlagBitsKHR" type="bitmask">
+        <enum bitpos="0"    name="VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR"/>
+        <enum bitpos="1"    name="VK_SURFACE_TRANSFORM_ROTATE_90_BIT_KHR"/>
+        <enum bitpos="2"    name="VK_SURFACE_TRANSFORM_ROTATE_180_BIT_KHR"/>
+        <enum bitpos="3"    name="VK_SURFACE_TRANSFORM_ROTATE_270_BIT_KHR"/>
+        <enum bitpos="4"    name="VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_BIT_KHR"/>
+        <enum bitpos="5"    name="VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_90_BIT_KHR"/>
+        <enum bitpos="6"    name="VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_180_BIT_KHR"/>
+        <enum bitpos="7"    name="VK_SURFACE_TRANSFORM_HORIZONTAL_MIRROR_ROTATE_270_BIT_KHR"/>
+        <enum bitpos="8"    name="VK_SURFACE_TRANSFORM_INHERIT_BIT_KHR"/>
+    </enums>
+    <enums namespace="VK" name="VkDebugReportFlagBitsEXT" type="bitmask">
+        <enum bitpos="0"     name="VK_DEBUG_REPORT_INFO_BIT_EXT"/>
+        <enum bitpos="1"     name="VK_DEBUG_REPORT_WARN_BIT_EXT"/>
+        <enum bitpos="2"     name="VK_DEBUG_REPORT_PERF_WARN_BIT_EXT"/>
+        <enum bitpos="3"     name="VK_DEBUG_REPORT_ERROR_BIT_EXT"/>
+        <enum bitpos="4"     name="VK_DEBUG_REPORT_DEBUG_BIT_EXT"/>
+    </enums>
+    <enums namespace="VK" name="VkDebugReportObjectTypeEXT" type="enum">
+        <enum value="0" name="VK_DEBUG_REPORT_OBJECT_TYPE_UNKNOWN_EXT"/>
+        <enum value="1" name="VK_DEBUG_REPORT_OBJECT_TYPE_INSTANCE_EXT"/>
+        <enum value="2" name="VK_DEBUG_REPORT_OBJECT_TYPE_PHYSICAL_DEVICE_EXT"/>
+        <enum value="3" name="VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_EXT"/>
+        <enum value="4" name="VK_DEBUG_REPORT_OBJECT_TYPE_QUEUE_EXT"/>
+        <enum value="5" name="VK_DEBUG_REPORT_OBJECT_TYPE_SEMAPHORE_EXT"/>
+        <enum value="6" name="VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_BUFFER_EXT"/>
+        <enum value="7" name="VK_DEBUG_REPORT_OBJECT_TYPE_FENCE_EXT"/>
+        <enum value="8" name="VK_DEBUG_REPORT_OBJECT_TYPE_DEVICE_MEMORY_EXT"/>
+        <enum value="9" name="VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_EXT"/>
+        <enum value="10" name="VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_EXT"/>
+        <enum value="11" name="VK_DEBUG_REPORT_OBJECT_TYPE_EVENT_EXT"/>
+        <enum value="12" name="VK_DEBUG_REPORT_OBJECT_TYPE_QUERY_POOL_EXT"/>
+        <enum value="13" name="VK_DEBUG_REPORT_OBJECT_TYPE_BUFFER_VIEW_EXT"/>
+        <enum value="14" name="VK_DEBUG_REPORT_OBJECT_TYPE_IMAGE_VIEW_EXT"/>
+        <enum value="15" name="VK_DEBUG_REPORT_OBJECT_TYPE_SHADER_MODULE_EXT"/>
+        <enum value="16" name="VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_CACHE_EXT"/>
+        <enum value="17" name="VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_LAYOUT_EXT"/>
+        <enum value="18" name="VK_DEBUG_REPORT_OBJECT_TYPE_RENDER_PASS_EXT"/>
+        <enum value="19" name="VK_DEBUG_REPORT_OBJECT_TYPE_PIPELINE_EXT"/>
+        <enum value="20" name="VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT_EXT"/>
+        <enum value="21" name="VK_DEBUG_REPORT_OBJECT_TYPE_SAMPLER_EXT"/>
+        <enum value="22" name="VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_POOL_EXT"/>
+        <enum value="23" name="VK_DEBUG_REPORT_OBJECT_TYPE_DESCRIPTOR_SET_EXT"/>
+        <enum value="24" name="VK_DEBUG_REPORT_OBJECT_TYPE_FRAMEBUFFER_EXT"/>
+        <enum value="25" name="VK_DEBUG_REPORT_OBJECT_TYPE_COMMAND_POOL_EXT"/>
+        <enum value="26" name="VK_DEBUG_REPORT_OBJECT_TYPE_SURFACE_KHR_EXT"/>
+        <enum value="27" name="VK_DEBUG_REPORT_OBJECT_TYPE_SWAPCHAIN_KHR_EXT"/>
+        <enum value="28" name="VK_DEBUG_REPORT_OBJECT_TYPE_DEBUG_REPORT_EXT"/>
+    </enums>
+    <enums namespace="VK" name="VkDebugReportErrorEXT" type="enum">
+        <enum value="0" name="VK_DEBUG_REPORT_ERROR_NONE_EXT"/>         <!-- Used for INFO & other non-error messages -->
+        <enum value="1" name="VK_DEBUG_REPORT_ERROR_CALLBACK_REF_EXT"/> <!-- Callbacks were not destroyed prior to calling DestroyInstance -->
+    </enums>
+
+    <!-- SECTION: Vulkan command definitions -->
+    <commands>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INITIALIZATION_FAILED,VK_ERROR_LAYER_NOT_PRESENT,VK_ERROR_EXTENSION_NOT_PRESENT,VK_ERROR_INCOMPATIBLE_DRIVER">
+            <proto><type>VkResult</type> <name>vkCreateInstance</name></proto>
+            <param>const <type>VkInstanceCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkInstance</type>* <name>pInstance</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyInstance</name></proto>
+            <param optional="true" externsync="true"><type>VkInstance</type> <name>instance</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All child objects created using pname:instance must: have been destroyed prior to destroying pname:instance</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:instance was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:instance was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INITIALIZATION_FAILED">
+            <proto><type>VkResult</type> <name>vkEnumeratePhysicalDevices</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPhysicalDeviceCount</name></param>
+            <param optional="true" len="pPhysicalDeviceCount"><type>VkPhysicalDevice</type>* <name>pPhysicalDevices</name></param>
+        </command>
+        <command>
+            <proto><type>PFN_vkVoidFunction</type> <name>vkGetDeviceProcAddr</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param len="null-terminated">const <type>char</type>* <name>pName</name></param>
+            <validity>
+                <usage>pname:pName must: be the name of a supported command that has a first parameter of type sname:VkDevice, sname:VkQueue or sname:VkCommandBuffer, either in the core API or an enabled extension</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>PFN_vkVoidFunction</type> <name>vkGetInstanceProcAddr</name></proto>
+            <param optional="true"><type>VkInstance</type> <name>instance</name></param>
+            <param len="null-terminated">const <type>char</type>* <name>pName</name></param>
+            <validity>
+                <usage>If pname:instance is `NULL`, pname:pName must: be one of: fname:vkEnumerateInstanceExtensionProperties, fname:vkEnumerateInstanceLayerProperties or fname:vkCreateInstance</usage>
+                <usage>If pname:instance is not `NULL`, pname:pName must: be the name of a core command or a command from an enabled extension, other than: fname:vkEnumerateInstanceExtensionProperties, fname:vkEnumerateInstanceLayerProperties or fname:vkCreateInstance</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkPhysicalDeviceProperties</type>* <name>pProperties</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceQueueFamilyProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pQueueFamilyPropertyCount</name></param>
+            <param optional="true" len="pQueueFamilyPropertyCount"><type>VkQueueFamilyProperties</type>* <name>pQueueFamilyProperties</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceMemoryProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkPhysicalDeviceMemoryProperties</type>* <name>pMemoryProperties</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceFeatures</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkPhysicalDeviceFeatures</type>* <name>pFeatures</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceFormatProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkFormat</type> <name>format</name></param>
+            <param><type>VkFormatProperties</type>* <name>pFormatProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_FORMAT_NOT_SUPPORTED">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceImageFormatProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkFormat</type> <name>format</name></param>
+            <param><type>VkImageType</type> <name>type</name></param>
+            <param><type>VkImageTiling</type> <name>tiling</name></param>
+            <param><type>VkImageUsageFlags</type> <name>usage</name></param>
+            <param optional="true"><type>VkImageCreateFlags</type> <name>flags</name></param>
+            <param><type>VkImageFormatProperties</type>* <name>pImageFormatProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INITIALIZATION_FAILED,VK_ERROR_LAYER_NOT_PRESENT,VK_ERROR_EXTENSION_NOT_PRESENT,VK_ERROR_FEATURE_NOT_PRESENT,VK_ERROR_TOO_MANY_OBJECTS,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkCreateDevice</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param>const <type>VkDeviceCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDevice</type>* <name>pDevice</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyDevice</name></proto>
+            <param optional="true" externsync="true"><type>VkDevice</type> <name>device</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All child objects created on pname:device must: have been destroyed prior to destroying pname:device</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:device was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:device was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkEnumerateInstanceLayerProperties</name></proto>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkLayerProperties</type>* <name>pProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkEnumerateInstanceExtensionProperties</name></proto>
+            <param optional="true" len="null-terminated">const <type>char</type>* <name>pLayerName</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkExtensionProperties</type>* <name>pProperties</name></param>
+            <validity>
+                <usage>If pname:pLayerName is not `NULL`, it must: be the name of a layer available on the system</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkEnumerateDeviceLayerProperties</name></proto>
+            <param optional="false,true"><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkLayerProperties</type>* <name>pProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkEnumerateDeviceExtensionProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param optional="true" len="null-terminated">const <type>char</type>* <name>pLayerName</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkExtensionProperties</type>* <name>pProperties</name></param>
+            <validity>
+                <usage>If pname:pLayerName is not `NULL`, it must: be the name of a layer available on the system</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetDeviceQueue</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>uint32_t</type> <name>queueIndex</name></param>
+            <param><type>VkQueue</type>* <name>pQueue</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be one of the queue family indexes specified when pname:device was created, via the sname:VkDeviceQueueCreateInfo structure</usage>
+                <usage>pname:queueIndex must: be less than the number of queues created for the specified queue family index when pname:device was created, via the pname:queueCount member of the sname:VkDeviceQueueCreateInfo structure</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkQueueSubmit</name></proto>
+            <param externsync="true"><type>VkQueue</type> <name>queue</name></param>
+            <param optional="true"><type>uint32_t</type> <name>submitCount</name></param>
+            <param len="submitCount" externsync="pSubmits[].pWaitSemaphores[],pSubmits[].pSignalSemaphores[]">const <type>VkSubmitInfo</type>* <name>pSubmits</name></param>
+            <param optional="true" externsync="true"><type>VkFence</type> <name>fence</name></param>
+            <validity>
+                <usage>pname:fence must: be unsignalled</usage>
+                <usage>pname:fence mustnot: be associated with any other queue command that has not yet completed execution on that queue</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkQueueWaitIdle</name></proto>
+            <param><type>VkQueue</type> <name>queue</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkDeviceWaitIdle</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <implicitexternsyncparams>
+                <param>all sname:VkQueue objects created from pname:device</param>
+            </implicitexternsyncparams>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_TOO_MANY_OBJECTS">
+            <proto><type>VkResult</type> <name>vkAllocateMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkMemoryAllocateInfo</type>* <name>pAllocateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDeviceMemory</type>* <name>pMemory</name></param>
+            <validity>
+                <usage>The number of currently valid memory objects, allocated from pname:device, must: be less than sname:VkPhysicalDeviceLimits::pname:maxMemoryAllocationCount</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkFreeMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkDeviceMemory</type> <name>memory</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:memory (via images or buffers) must: have completed execution</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_MEMORY_MAP_FAILED">
+            <proto><type>VkResult</type> <name>vkMapMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkDeviceMemory</type> <name>memory</name></param>
+            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <param><type>VkDeviceSize</type> <name>size</name></param>
+            <param optional="true"><type>VkMemoryMapFlags</type> <name>flags</name></param>
+            <param><type>void</type>** <name>ppData</name></param>
+            <validity>
+                <usage>pname:memory mustnot: currently be mapped</usage>
+                <usage>pname:offset must: be less than the size of pname:memory</usage>
+                <usage>If pname:size is not equal to ename:VK_WHOLE_SIZE, the sum of pname:offset and pname:size must: be less than or equal to the pname:size of the pname:memory</usage>
+                <usage>pname:memory must: have been created with a memory type that reports ename:VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkUnmapMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkDeviceMemory</type> <name>memory</name></param>
+            <validity>
+                <usage>pname:memory must: currently be mapped</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkFlushMappedMemoryRanges</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>memoryRangeCount</name></param>
+            <param len="memoryRangeCount">const <type>VkMappedMemoryRange</type>* <name>pMemoryRanges</name></param>
+            <validity>
+                <usage>The memory ranges specified by pname:pMemoryRanges must: all currently be mapped</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkInvalidateMappedMemoryRanges</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>memoryRangeCount</name></param>
+            <param len="memoryRangeCount">const <type>VkMappedMemoryRange</type>* <name>pMemoryRanges</name></param>
+            <validity>
+                <usage>The memory ranges specified by pname:pMemoryRanges must: all currently be mapped</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetDeviceMemoryCommitment</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkDeviceMemory</type> <name>memory</name></param>
+            <param><type>VkDeviceSize</type>* <name>pCommittedMemoryInBytes</name></param>
+            <validity>
+                <usage>pname:memory must: have been created with a memory type that reports ename:VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetBufferMemoryRequirements</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkMemoryRequirements</type>* <name>pMemoryRequirements</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkBindBufferMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkDeviceMemory</type> <name>memory</name></param>
+            <param><type>VkDeviceSize</type> <name>memoryOffset</name></param>
+            <validity>
+                <usage>pname:buffer mustnot: already be backed by a memory object</usage>
+                <usage>pname:buffer mustnot: have been created with any sparse memory binding flags</usage>
+                <usage>pname:memoryOffset must: be less than the size of pname:memory</usage>
+                <usage>If pname:buffer was created with the ename:VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT or ename:VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT, pname:memoryOffset must: be a multiple of the value of sname:VkPhysicalDeviceLimits::pname:minTexelBufferOffsetAlignment</usage>
+                <usage>If pname:buffer was created with the ename:VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, pname:memoryOffset must: be a multiple of the value of sname:VkPhysicalDeviceLimits::pname:minUniformBufferOffsetAlignment</usage>
+                <usage>If pname:buffer was created with the ename:VK_BUFFER_USAGE_STORAGE_BUFFER_BIT, pname:memoryOffset must: be a multiple of the value of sname:VkPhysicalDeviceLimits::pname:minStorageBufferOffsetAlignment</usage>
+                <usage>pname:memory must: have been allocated using one of the memory types allowed in the pname:memoryTypeBits member of the sname:VkMemoryRequirements structure returned from a call to fname:vkGetBufferMemoryRequirements with pname:buffer</usage>
+                <usage>The sum of pname:memoryOffset and the size of pname:buffer must: be less than or equal to the size of pname:memory</usage>
+                <usage>pname:memoryOffset must: be an integer multiple of the pname:alignment member of the sname:VkMemoryRequirements structure returned from a call to fname:vkGetBufferMemoryRequirements with pname:buffer</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetImageMemoryRequirements</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkImage</type> <name>image</name></param>
+            <param><type>VkMemoryRequirements</type>* <name>pMemoryRequirements</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkBindImageMemory</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkImage</type> <name>image</name></param>
+            <param><type>VkDeviceMemory</type> <name>memory</name></param>
+            <param><type>VkDeviceSize</type> <name>memoryOffset</name></param>
+            <validity>
+                <usage>pname:image mustnot: already be backed by a memory object</usage>
+                <usage>pname:image mustnot: have been created with any sparse memory binding flags</usage>
+                <usage>pname:memoryOffset must: be less than the size of pname:memory</usage>
+                <usage>pname:memory must: have been allocated using one of the memory types allowed in the pname:memoryTypeBits member of the sname:VkMemoryRequirements structure returned from a call to fname:vkGetImageMemoryRequirements with pname:image</usage>
+                <usage>pname:memoryOffset must: be an integer multiple of the pname:alignment member of the sname:VkMemoryRequirements structure returned from a call to fname:vkGetImageMemoryRequirements with pname:image</usage>
+                <usage>pname:memory must: have storage from pname:memoryOffset onwards equal to or greater than the pname:size member of the sname:VkMemoryRequirements structure returned from a call to fname:vkGetImageMemoryRequirements with pname:image</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetImageSparseMemoryRequirements</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkImage</type> <name>image</name></param>
+            <param><type>uint32_t</type>* <name>pSparseMemoryRequirementCount</name></param>
+            <param optional="true" len="pSparseMemoryRequirementCount"><type>VkSparseImageMemoryRequirements</type>* <name>pSparseMemoryRequirements</name></param>
+            <validity>
+                <usage>pname:image must: have been created with the ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT flag</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetPhysicalDeviceSparseImageFormatProperties</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkFormat</type> <name>format</name></param>
+            <param><type>VkImageType</type> <name>type</name></param>
+            <param><type>VkSampleCountFlagBits</type> <name>samples</name></param>
+            <param><type>VkImageUsageFlags</type> <name>usage</name></param>
+            <param><type>VkImageTiling</type> <name>tiling</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkSparseImageFormatProperties</type>* <name>pProperties</name></param>
+            <validity>
+                <usage>If pname:format is an integer format, samples must: be one of the bit flag values specified in the value of sname:VkPhysicalDeviceLimits::pname:sampledImageIntegerSampleCounts</usage>
+                <usage>If pname:format is a non-integer color format, samples must: be one of the bit flag values specified in the value of sname:VkPhysicalDeviceLimits::pname:sampledImageColorSampleCounts</usage>
+                <usage>If pname:format is a depth format, samples must: be one of the bit flag values specified in the value of sname:VkPhysicalDeviceLimits::pname:sampledImageDepthSampleCounts</usage>
+                <usage>If pname:format is a stencil format, samples must: be one of the bit flag values specified in the value of sname:VkPhysicalDeviceLimits::pname:sampledImageStencilSampleCounts</usage>
+                <usage>If pname:usage includes ename:VK_IMAGE_USAGE_STORAGE_BIT, samples must: be one of the bit flag values specified in the value of sname:VkPhysicalDeviceLimits::pname:storageImageSampleCounts</usage>
+            </validity>
+        </command>
+        <command queues="sparse_binding" successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkQueueBindSparse</name></proto>
+            <param externsync="true"><type>VkQueue</type> <name>queue</name></param>
+            <param optional="true"><type>uint32_t</type> <name>bindInfoCount</name></param>
+            <param len="bindInfoCount" externsync="pBindInfo[].pWaitSemaphores[],pBindInfo[].pSignalSemaphores[],pBindInfo[].pBufferBinds[].buffer,pBindInfo[].pImageOpaqueBinds[].image,pBindInfo[].pImageBinds[].image">const <type>VkBindSparseInfo</type>* <name>pBindInfo</name></param>
+            <param optional="true" externsync="true"><type>VkFence</type> <name>fence</name></param>
+            <validity>
+                <usage>pname:fence must: be unsignalled</usage>
+                <usage>pname:fence mustnot: be associated with any other queue command that has not yet completed execution on that queue</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateFence</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkFenceCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkFence</type>* <name>pFence</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyFence</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkFence</type> <name>fence</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>pname:fence mustnot: be associated with any queue command that has not yet completed execution on that queue</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:fence was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:fence was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkResetFences</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>fenceCount</name></param>
+            <param len="fenceCount" externsync="true">const <type>VkFence</type>* <name>pFences</name></param>
+            <validity>
+                <usage>Any given element of pname:pFences mustnot: currently be associated with any queue command that has not yet completed execution on that queue</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_NOT_READY" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkGetFenceStatus</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkFence</type> <name>fence</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_TIMEOUT" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkWaitForFences</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>fenceCount</name></param>
+            <param len="fenceCount">const <type>VkFence</type>* <name>pFences</name></param>
+            <param><type>VkBool32</type> <name>waitAll</name></param>
+            <param><type>uint64_t</type> <name>timeout</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateSemaphore</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkSemaphoreCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSemaphore</type>* <name>pSemaphore</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroySemaphore</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkSemaphore</type> <name>semaphore</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>pname:semaphore mustnot: be associated with any queue command that has not yet completed execution on that queue</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:semaphore was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:semaphore was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateEvent</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkEventCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkEvent</type>* <name>pEvent</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyEvent</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkEvent</type> <name>event</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:event must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:event was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:event was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_EVENT_SET,VK_EVENT_RESET" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkGetEventStatus</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkEvent</type> <name>event</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkSetEvent</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkEvent</type> <name>event</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkResetEvent</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkEvent</type> <name>event</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateQueryPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkQueryPoolCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkQueryPool</type>* <name>pQueryPool</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyQueryPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:queryPool must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:queryPool was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:queryPool was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_NOT_READY" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_DEVICE_LOST">
+            <proto><type>VkResult</type> <name>vkGetQueryPoolResults</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>firstQuery</name></param>
+            <param><type>uint32_t</type> <name>queryCount</name></param>
+            <param><type>size_t</type> <name>dataSize</name></param>
+            <param len="dataSize"><type>void</type>* <name>pData</name></param>
+            <param><type>VkDeviceSize</type> <name>stride</name></param>
+            <param optional="true"><type>VkQueryResultFlags</type> <name>flags</name></param>
+            <validity>
+                <usage>pname:firstQuery must: be less than the number of queries in pname:queryPool</usage>
+                <usage>If ename:VK_QUERY_RESULT_64_BIT is not set in pname:flags then pname:pData and pname:stride must be multiples of `4`</usage>
+                <usage>If ename:VK_QUERY_RESULT_64_BIT is set in pname:flags then pname:pData and pname:stride must be multiples of `8`</usage>
+                <usage>The sum of pname:firstQuery and pname:queryCount must: be less than or equal to the number of queries in pname:queryPool</usage>
+                <usage>pname:dataSize must: be large enough to contain the result of each query, as described &lt;&lt;queries-operation-memorylayout,here&gt;&gt;</usage>
+                <usage>If the pname:queryType used to create pname:queryPool was ename:VK_QUERY_TYPE_TIMESTAMP, pname:flags mustnot: contain ename:VK_QUERY_RESULT_PARTIAL_BIT</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateBuffer</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkBufferCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkBuffer</type>* <name>pBuffer</name></param>
+            <validity>
+                <usage>If the pname:flags member of pname:pCreateInfo includes ename:VK_BUFFER_CREATE_SPARSE_BINDING_BIT or ename:VK_BUFFER_CREATE_SPARSE_RESIDENCY_BIT, creating this sname:VkBuffer mustnot: cause the total required sparse memory for all currently valid sparse resources on the device to exceed sname:VkPhysicalDeviceLimits::pname:sparseAddressSpaceSize</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyBuffer</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkBuffer</type> <name>buffer</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:buffer, either directly or via a sname:VkBufferView, must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:buffer was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:buffer was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateBufferView</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkBufferViewCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkBufferView</type>* <name>pView</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyBufferView</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkBufferView</type> <name>bufferView</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:bufferView must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:bufferView was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:bufferView was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateImage</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkImageCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkImage</type>* <name>pImage</name></param>
+            <validity>
+                <usage>If the pname:flags member of pname:pCreateInfo includes ename:VK_IMAGE_CREATE_SPARSE_BINDING_BIT or ename:VK_IMAGE_CREATE_SPARSE_RESIDENCY_BIT, creating this sname:VkImage mustnot: cause the total required sparse memory for all currently valid sparse resources on the device to exceed sname:VkPhysicalDeviceLimits::pname:sparseAddressSpaceSize</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyImage</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkImage</type> <name>image</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:image, either directly or via a sname:VkImageView, must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:image was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:image was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetImageSubresourceLayout</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkImage</type> <name>image</name></param>
+            <param>const <type>VkImageSubresource</type>* <name>pSubresource</name></param>
+            <param><type>VkSubresourceLayout</type>* <name>pLayout</name></param>
+            <validity>
+                <usage>pname:image must: have been created with pname:tiling equal to ename:VK_IMAGE_TILING_LINEAR</usage>
+                <usage>The pname:aspectMask member of pname:pSubresource must: only have a single bit set</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateImageView</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkImageViewCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkImageView</type>* <name>pView</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyImageView</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkImageView</type> <name>imageView</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:imageView must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:imageView was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:imageView was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateShaderModule</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkShaderModuleCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkShaderModule</type>* <name>pShaderModule</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyShaderModule</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkShaderModule</type> <name>shaderModule</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:shaderModule was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:shaderModule was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreatePipelineCache</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkPipelineCacheCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkPipelineCache</type>* <name>pPipelineCache</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyPipelineCache</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkPipelineCache</type> <name>pipelineCache</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:pipelineCache was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:pipelineCache was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPipelineCacheData</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkPipelineCache</type> <name>pipelineCache</name></param>
+            <param optional="false,true"><type>size_t</type>* <name>pDataSize</name></param>
+            <param optional="true" len="pDataSize"><type>void</type>* <name>pData</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkMergePipelineCaches</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkPipelineCache</type> <name>dstCache</name></param>
+            <param><type>uint32_t</type> <name>srcCacheCount</name></param>
+            <param len="srcCacheCount">const <type>VkPipelineCache</type>* <name>pSrcCaches</name></param>
+            <validity>
+                <usage>pname:dstCache mustnot: appear in the list of source caches</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateGraphicsPipelines</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkPipelineCache</type> <name>pipelineCache</name></param>
+            <param><type>uint32_t</type> <name>createInfoCount</name></param>
+            <param len="createInfoCount">const <type>VkGraphicsPipelineCreateInfo</type>* <name>pCreateInfos</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param len="createInfoCount"><type>VkPipeline</type>* <name>pPipelines</name></param>
+            <validity>
+                <usage>If the value of the pname:flags member of any given element of pname:pCreateInfos contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and the pname:basePipelineIndex member of that same element is not `-1`, the value of pname:basePipelineIndex must: be less than the index into pname:pCreateInfos that corresponds to that element</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateComputePipelines</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkPipelineCache</type> <name>pipelineCache</name></param>
+            <param><type>uint32_t</type> <name>createInfoCount</name></param>
+            <param len="createInfoCount">const <type>VkComputePipelineCreateInfo</type>* <name>pCreateInfos</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param len="createInfoCount"><type>VkPipeline</type>* <name>pPipelines</name></param>
+            <validity>
+                <usage>If the value of the pname:flags member of any given element of pname:pCreateInfos contains the ename:VK_PIPELINE_CREATE_DERIVATIVE_BIT flag, and the pname:basePipelineIndex member of that same element is not `-1`, the value of pname:basePipelineIndex must: be less than the index into pname:pCreateInfos that corresponds to that element</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyPipeline</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkPipeline</type> <name>pipeline</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:pipeline must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:pipeline was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:pipeline was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreatePipelineLayout</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkPipelineLayoutCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkPipelineLayout</type>* <name>pPipelineLayout</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyPipelineLayout</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkPipelineLayout</type> <name>pipelineLayout</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:pipelineLayout was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:pipelineLayout was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_TOO_MANY_OBJECTS">
+            <proto><type>VkResult</type> <name>vkCreateSampler</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkSamplerCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSampler</type>* <name>pSampler</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroySampler</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkSampler</type> <name>sampler</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:sampler must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:sampler was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:sampler was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateDescriptorSetLayout</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkDescriptorSetLayoutCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDescriptorSetLayout</type>* <name>pSetLayout</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyDescriptorSetLayout</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkDescriptorSetLayout</type> <name>descriptorSetLayout</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:descriptorSetLayout was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:descriptorSetLayout was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateDescriptorPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkDescriptorPoolCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDescriptorPool</type>* <name>pDescriptorPool</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyDescriptorPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkDescriptorPool</type> <name>descriptorPool</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:descriptorPool (via any allocated descriptor sets) must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:descriptorPool was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:descriptorPool was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkResetDescriptorPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkDescriptorPool</type> <name>descriptorPool</name></param>
+            <param optional="true"><type>VkDescriptorPoolResetFlags</type> <name>flags</name></param>
+            <implicitexternsyncparams>
+                <param>any sname:VkDescriptorSet objects allocated from pname:descriptorPool</param>
+            </implicitexternsyncparams>
+            <validity>
+                <usage>All uses of pname:descriptorPool (via any allocated descriptor sets) must: have completed execution</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkAllocateDescriptorSets</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="pAllocateInfo->descriptorPool">const <type>VkDescriptorSetAllocateInfo</type>* <name>pAllocateInfo</name></param>
+            <param len="pAllocateInfo->descriptorSetCount"><type>VkDescriptorSet</type>* <name>pDescriptorSets</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkFreeDescriptorSets</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkDescriptorPool</type> <name>descriptorPool</name></param>
+            <param><type>uint32_t</type> <name>descriptorSetCount</name></param>
+            <param noautovalidity="true" externsync="true" len="descriptorSetCount">const <type>VkDescriptorSet</type>* <name>pDescriptorSets</name></param>
+            <validity>
+                <usage>All submitted commands that refer to any element of pname:pDesciptorSets must: have completed execution</usage>
+                <usage>pname:pDescriptorSets must: be a pointer to an array of pname:descriptorSetCount sname:VkDescriptorSet handles, each element of which must: either be a valid handle or sname:VK_NULL_HANDLE</usage>
+                <usage>pname:descriptorPool must: have been created with the ename:VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT flag</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkUpdateDescriptorSets</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>uint32_t</type> <name>descriptorWriteCount</name></param>
+            <param len="descriptorWriteCount" externsync="pDescriptorWrites[].dstSet">const <type>VkWriteDescriptorSet</type>* <name>pDescriptorWrites</name></param>
+            <param optional="true"><type>uint32_t</type> <name>descriptorCopyCount</name></param>
+            <param len="descriptorCopyCount" externsync="pDescriptorCopies[].dstSet">const <type>VkCopyDescriptorSet</type>* <name>pDescriptorCopies</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateFramebuffer</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkFramebufferCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkFramebuffer</type>* <name>pFramebuffer</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyFramebuffer</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkFramebuffer</type> <name>framebuffer</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:framebuffer must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:framebuffer was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:framebuffer was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateRenderPass</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkRenderPassCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkRenderPass</type>* <name>pRenderPass</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyRenderPass</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkRenderPass</type> <name>renderPass</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All submitted commands that refer to pname:renderPass must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:renderPass was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:renderPass was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetRenderAreaGranularity</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkRenderPass</type> <name>renderPass</name></param>
+            <param><type>VkExtent2D</type>* <name>pGranularity</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateCommandPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkCommandPoolCreateInfo</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkCommandPool</type>* <name>pCommandPool</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkDestroyCommandPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkCommandPool</type> <name>commandPool</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All sname:VkCommandBuffer objects allocated from pname:commandPool mustnot: be pending execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:commandPool was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:commandPool was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkResetCommandPool</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkCommandPool</type> <name>commandPool</name></param>
+            <param optional="true"><type>VkCommandPoolResetFlags</type> <name>flags</name></param>
+            <validity>
+                <usage>All sname:VkCommandBuffer objects allocated from pname:commandPool mustnot: currently be pending execution</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkAllocateCommandBuffers</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="pAllocateInfo->commandPool">const <type>VkCommandBufferAllocateInfo</type>* <name>pAllocateInfo</name></param>
+            <param len="pAllocateInfo->commandBufferCount"><type>VkCommandBuffer</type>* <name>pCommandBuffers</name></param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkFreeCommandBuffers</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkCommandPool</type> <name>commandPool</name></param>
+            <param><type>uint32_t</type> <name>commandBufferCount</name></param>
+            <param noautovalidity="true" externsync="true" len="commandBufferCount">const <type>VkCommandBuffer</type>* <name>pCommandBuffers</name></param>
+            <validity>
+                <usage>All elements of pname:pCommandBuffers mustnot: be pending execution</usage>
+                <usage>pname:pCommandBuffers must: be a pointer to an array of pname:commandBufferCount sname:VkCommandBuffer handles, each element of which must: either be a valid handle or sname:VK_NULL_HANDLE</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkBeginCommandBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkCommandBufferBeginInfo</type>* <name>pBeginInfo</name></param>
+            <validity>
+                <usage>pname:commandBuffer mustnot: be in the recording state</usage>
+                <usage>If pname:commandBuffer was allocated from a sname:VkCommandPool which did not have the ename:VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT flag set, pname:commandBuffer must: be in the initial state.</usage>
+                <usage>If pname:commandBuffer is a secondary command buffer, the pname:pInheritanceInfo member of pname:pBeginInfo must: be a valid sname:VkCommandBufferInheritanceInfo structure</usage>
+                <usage>If pname:commandBuffer is a secondary command buffer and either the pname:occlusionQueryEnable member of the pname:pInheritanceInfo member of pname:pBeginInfo is ename:VK_FALSE, or the precise occlusion queries feature is not enabled, the pname:queryFlags member of the pname:pInheritanceInfo member pname:pBeginInfo mustnot: contain ename:VK_QUERY_CONTROL_PRECISE_BIT</usage>
+
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkEndCommandBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <validity>
+                <usage>pname:commandBuffer must: be in the recording state</usage>
+                <usage>fname:vkEndCommandBuffer mustnot: be called inside a render pass instance</usage>
+                <usage>All queries made &lt;&lt;queries-operation-active,active&gt;&gt; during the recording of pname:commandBuffer must: have been made inactive</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkResetCommandBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param optional="true"><type>VkCommandBufferResetFlags</type> <name>flags</name></param>
+            <validity>
+                <usage>pname:commandBuffer mustnot: currently be pending execution</usage>
+                <usage>pname:commandBuffer must: have been allocated from a pool that was created with the ename:VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBindPipeline</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPipelineBindPoint</type> <name>pipelineBindPoint</name></param>
+            <param><type>VkPipeline</type> <name>pipeline</name></param>
+            <validity>
+                <usage>If the value of pname:pipelineBindPoint is ename:VK_PIPELINE_BIND_POINT_COMPUTE, the sname:VkCommandPool that pname:commandBuffer was allocated from must: support compute operations</usage>
+                <usage>If the value of pname:pipelineBindPoint is ename:VK_PIPELINE_BIND_POINT_GRAPHICS, the sname:VkCommandPool that pname:commandBuffer was allocated from must: support graphics operations</usage>
+                <usage>If the value of pname:pipelineBindPoint is ename:VK_PIPELINE_BIND_POINT_COMPUTE, pname:pipeline must: be a compute pipeline</usage>
+                <usage>If the value of pname:pipelineBindPoint is ename:VK_PIPELINE_BIND_POINT_GRAPHICS, pname:pipeline must: be a graphics pipeline</usage>
+                <usage>If the &lt;&lt;features-features-variableMultisampleRate,variable multisample rate&gt;&gt; feature is not supported, pname:pipeline is a graphics pipeline, the current subpass has no attachments, and this is not the first call to this function with a graphics pipeline after transitioning to the current subpass, then the sample count specified by this pipeline must: match that set in the previous pipeline</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetViewport</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>firstViewport</name></param>
+            <param><type>uint32_t</type> <name>viewportCount</name></param>
+            <param len="viewportCount">const <type>VkViewport</type>* <name>pViewports</name></param>
+            <validity>
+                <usage>pname:firstViewport must: be less than sname:VkPhysicalDeviceLimits::pname:maxViewports</usage>
+                <usage>The sum of pname:firstViewport and pname:viewportCount must: be between `1` and sname:VkPhysicalDeviceLimits::pname:maxViewports, inclusive</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetScissor</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>firstScissor</name></param>
+            <param><type>uint32_t</type> <name>scissorCount</name></param>
+            <param len="scissorCount">const <type>VkRect2D</type>* <name>pScissors</name></param>
+            <validity>
+                <usage>pname:firstScissor must: be less than sname:VkPhysicalDeviceLimits::pname:maxViewports</usage>
+                <usage>The sum of pname:firstScissor and pname:scissorCount must: be between `1` and sname:VkPhysicalDeviceLimits::pname:maxViewports, inclusive</usage>
+                <usage>The pname:x and pname:y members of pname:offset must: be greater than or equal to `0`</usage>
+                <usage>Evaluation of (pname:offset.x + pname:extent.width) mustnot: cause a signed integer addition overflow</usage>
+                <usage>Evaluation of (pname:offset.y + pname:extent.height) mustnot: cause a signed integer addition overflow</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetLineWidth</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>float</type> <name>lineWidth</name></param>
+            <validity>
+                <usage>If the &lt;&lt;features-features-wideLines,wide lines&gt;&gt; feature is not enabled, the value of pname:lineWidth must: be `1.0`</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthBias</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>float</type> <name>depthBiasConstantFactor</name></param>
+            <param><type>float</type> <name>depthBiasClamp</name></param>
+            <param><type>float</type> <name>depthBiasSlopeFactor</name></param>
+            <validity>
+                <usage>If the &lt;&lt;features-features-depthBiasClamp,depth bias clamping&gt;&gt; feature is not enabled, the value of pname:depthBiasClamp must: be code:0.0</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetBlendConstants</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>float</type> <name>blendConstants</name>[4]</param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthBounds</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>float</type> <name>minDepthBounds</name></param>
+            <param><type>float</type> <name>maxDepthBounds</name></param>
+            <validity>
+                <usage>The value of pname:minDepthBounds must: be between `0.0` and `1.0`, inclusive</usage>
+                <usage>The value of pname:maxDepthBounds must: be between `0.0` and `1.0`, inclusive</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetStencilCompareMask</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkStencilFaceFlags</type> <name>faceMask</name></param>
+            <param><type>uint32_t</type> <name>compareMask</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetStencilWriteMask</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkStencilFaceFlags</type> <name>faceMask</name></param>
+            <param><type>uint32_t</type> <name>writeMask</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetStencilReference</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkStencilFaceFlags</type> <name>faceMask</name></param>
+            <param><type>uint32_t</type> <name>reference</name></param>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBindDescriptorSets</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPipelineBindPoint</type> <name>pipelineBindPoint</name></param>
+            <param><type>VkPipelineLayout</type> <name>layout</name></param>
+            <param><type>uint32_t</type> <name>firstSet</name></param>
+            <param><type>uint32_t</type> <name>descriptorSetCount</name></param>
+            <param len="descriptorSetCount">const <type>VkDescriptorSet</type>* <name>pDescriptorSets</name></param>
+            <param optional="true"><type>uint32_t</type> <name>dynamicOffsetCount</name></param>
+            <param len="dynamicOffsetCount">const <type>uint32_t</type>* <name>pDynamicOffsets</name></param>
+            <validity>
+                <usage>Any given element of pname:pDescriptorSets must: have been created with a sname:VkDescriptorSetLayout that matches the sname:VkDescriptorSetLayout at set _n_ in pname:layout, where _n_ is the sum of the index into pname:pDescriptorSets and pname:firstSet</usage>
+                <usage>pname:dynamicOffsetCount must: be equal to the total number of dynamic descriptors in pname:pDescriptorSets</usage>
+                <usage>pname:pipelineBindPoint must: be supported by the pname:commandBuffer's parent sname:VkCommandPool's queue family</usage>
+                <usage>Any given element of pname:pDynamicOffsets must: satisfy the required alignment for the corresponding descriptor binding's descriptor type</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBindIndexBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <param><type>VkIndexType</type> <name>indexType</name></param>
+            <validity>
+                <usage>The value of pname:offset must: be less than the size of pname:buffer</usage>
+                <usage>The sum of pname:offset, and the address of the range of sname:VkDeviceMemory object that's backing pname:buffer, must: be a multiple of the type indicated by pname:indexType</usage>
+                <usage>pname:buffer must: have been created with the ename:VK_BUFFER_USAGE_INDEX_BUFFER_BIT flag</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBindVertexBuffers</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>firstBinding</name></param>
+            <param><type>uint32_t</type> <name>bindingCount</name></param>
+            <param len="bindingCount">const <type>VkBuffer</type>* <name>pBuffers</name></param>
+            <param len="bindingCount">const <type>VkDeviceSize</type>* <name>pOffsets</name></param>
+            <validity>
+                <usage>pname:firstBinding must: be less than sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindings</usage>
+                <usage>The sum of pname:firstBinding and pname:bindingCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxVertexInputBindings</usage>
+                <usage>All elements of pname:pOffsets must: be less than the size of the corresponding element in pname:pBuffers</usage>
+                <usage>All elements of pname:pBuffers must: have been created with the ename:VK_BUFFER_USAGE_VERTEX_BUFFER_BIT flag</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDraw</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>vertexCount</name></param>
+            <param><type>uint32_t</type> <name>instanceCount</name></param>
+            <param><type>uint32_t</type> <name>firstVertex</name></param>
+            <param><type>uint32_t</type> <name>firstInstance</name></param>
+            <validity>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for push constants, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>All vertex input bindings accessed via vertex input variables declared in the vertex shader entry point's interface must: have valid buffers bound</usage>
+                <usage>For a given vertex buffer binding, any attribute data fetched must: be entirely contained within the corresponding vertex buffer binding, as described in &lt;&lt;fxvertex-input&gt;&gt;</usage>
+                <usage>A valid graphics pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_GRAPHICS</usage>
+                <usage>If the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS requires any dynamic state, that state must: have been set on the current command buffer</usage>
+                <usage>Every input attachment used by the current subpass must: be bound to the pipeline via a descriptor set</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDrawIndexed</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>indexCount</name></param>
+            <param><type>uint32_t</type> <name>instanceCount</name></param>
+            <param><type>uint32_t</type> <name>firstIndex</name></param>
+            <param><type>int32_t</type> <name>vertexOffset</name></param>
+            <param><type>uint32_t</type> <name>firstInstance</name></param>
+            <validity>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for push constants, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>All vertex input bindings accessed via vertex input variables declared in the vertex shader entry point's interface must: have valid buffers bound</usage>
+                <usage>For a given vertex buffer binding, any attribute data fetched must: be entirely contained within the corresponding vertex buffer binding, as described in &lt;&lt;fxvertex-input&gt;&gt;</usage>
+                <usage>A valid graphics pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_GRAPHICS</usage>
+                <usage>If the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS requires any dynamic state, that state must: have been set on the current command buffer</usage>
+                <usage>The total value of (pname:indexSize * (pname:firstIndex + pname:indexCount) + pname:offset) must: be less than or equal to the size of the currently bound index buffer, with indexSize being based on the type specified by pname:indexType, where the index buffer, pname:indexType, and pname:offset are specified via fname:vkCmdBindIndexBuffer</usage>
+                <usage>Every input attachment used by the current subpass must: be bound to the pipeline via a descriptor set</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDrawIndirect</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <param><type>uint32_t</type> <name>drawCount</name></param>
+            <param><type>uint32_t</type> <name>stride</name></param>
+            <validity>
+                <usage>The value of pname:offset must: be a multiple of `4`</usage>
+                <usage>If the &lt;&lt;features-features-multiDrawIndirect,multi-draw indirect&gt;&gt; feature is not enabled, the value of pname:drawCount must: be `0` or `1`</usage>
+                <usage>If the &lt;&lt;features-features-drawIndirectFirstInstance,drawIndirectFirstInstance&gt;&gt; feature is not enabled, all the pname:firstInstance members of the sname:VkDrawIndirectCommand structures accessed by this command must: be code:0</usage>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for push constants, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>All vertex input bindings accessed via vertex input variables declared in the vertex shader entry point's interface must: have valid buffers bound</usage>
+                <usage>A valid graphics pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_GRAPHICS</usage>
+                <usage>If the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS requires any dynamic state, that state must: have been set on the current command buffer</usage>
+                <usage>If pname:drawCount is greater than `0`, the total value of (pname:stride * (pname:drawCount - 1) + pname:offset + sizeof(sname:VkDrawIndirectCommand)) must: be less than or equal to the size of pname:buffer</usage>
+                <usage>pname:drawCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxDrawIndirectCount</usage>
+                <usage>Every input attachment used by the current subpass must: be bound to the pipeline via a descriptor set</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDrawIndexedIndirect</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <param><type>uint32_t</type> <name>drawCount</name></param>
+            <param><type>uint32_t</type> <name>stride</name></param>
+            <validity>
+                <usage>The value of pname:offset must: be a multiple of `4`</usage>
+                <usage>If the &lt;&lt;features-features-multiDrawIndirect,multi-draw indirect&gt;&gt; feature is not enabled, the value of pname:drawCount must: be `0` or `1`</usage>
+                <usage>If the &lt;&lt;features-features-drawIndirectFirstInstance,drawIndirectFirstInstance&gt;&gt; feature is not enabled, all the pname:firstInstance members of the sname:VkDrawIndexedIndirectCommand structures accessed by this command must: be code:0</usage>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_GRAPHICS, with a sname:VkPipelineLayout that is compatible for push constants, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>All vertex input bindings accessed via vertex input variables declared in the vertex shader entry point's interface must: have valid buffers bound</usage>
+                <usage>A valid graphics pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_GRAPHICS</usage>
+                <usage>If the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS requires any dynamic state, that state must: have been set on the current command buffer</usage>
+                <usage>If pname:drawCount is greater than `0`, the total value of (pname:stride * (pname:drawCount - 1) + pname:offset + sizeof(sname:VkDrawIndexedIndirectCommand)) must: be less than or equal to the size of pname:buffer</usage>
+                <usage>pname:drawCount must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxDrawIndirectCount</usage>
+                <usage>Every input attachment used by the current subpass must: be bound to the pipeline via a descriptor set</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_GRAPHICS accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDispatch</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>x</name></param>
+            <param><type>uint32_t</type> <name>y</name></param>
+            <param><type>uint32_t</type> <name>z</name></param>
+            <validity>
+                <usage>pname:x must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[0]</usage>
+                <usage>pname:y must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[1]</usage>
+                <usage>pname:z must: be less than or equal to sname:VkPhysicalDeviceLimits::pname:maxComputeWorkGroupCount[2]</usage>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_COMPUTE, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>A valid compute pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_COMPUTE</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_COMPUTE, with a sname:VkPipelineLayout that is compatible for push constants with the one used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdDispatchIndirect</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>buffer</name></param>
+            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <validity>
+                <usage>For each set _n_ that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE, a descriptor set must: have been bound to _n_ at ename:VK_PIPELINE_BIND_POINT_COMPUTE, with a sname:VkPipelineLayout that is compatible for set _n_, with the sname:VkPipelineLayout used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>Descriptors in each bound descriptor set, specified via fname:vkCmdBindDescriptorSets, must: be valid if they are statically used by the currently bound sname:VkPipeline object, specified via fname:vkCmdBindPipeline</usage>
+                <usage>A valid compute pipeline must: be bound to the current command buffer with ename:VK_PIPELINE_BIND_POINT_COMPUTE</usage>
+                <usage>pname:buffer must: have been created with the ename:VK_BUFFER_USAGE_INDIRECT_BUFFER_BIT bit set</usage>
+                <usage>The value of pname:offset must: be a multiple of `4`</usage>
+                <usage>The sum of pname:offset and the size of sname:VkDispatchIndirectCommand must: be less than or equal to the size of pname:buffer</usage>
+                <usage>For each push constant that is statically used by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE, a push constant value must: have been set for ename:VK_PIPELINE_BIND_POINT_COMPUTE, with a sname:VkPipelineLayout that is compatible for push constants with the one used to create the current sname:VkPipeline, as described in &lt;&lt;descriptorsets-compatibility&gt;&gt;</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used to sample from any sname:VkImage with a sname:VkImageView of the type ename:VK_IMAGE_VIEW_TYPE_3D, ename:VK_IMAGE_VIEW_TYPE_CUBE, ename:VK_IMAGE_VIEW_TYPE_1D_ARRAY, ename:VK_IMAGE_VIEW_TYPE_2D_ARRAY or ename:VK_IMAGE_VIEW_TYPE_CUBE_ARRAY, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions with "ImplicitLod", "Dref" or "Proj" in their name, in any shader stage</usage>
+                <usage>If any sname:VkSampler object that is accessed from a shader by the sname:VkPipeline currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE uses unnormalized coordinates, it mustnot: be used with any of the SPIR-V `OpImageSample*` or `OpImageSparseSample*` instructions that includes a lod bias or any offset values, in any shader stage</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE accesses a uniform buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+                <usage>If the &lt;&lt;features-features-robustBufferAccess,robust buffer access&gt;&gt; feature is not enabled, and any shader stage in the sname:VkPipeline object currently bound to ename:VK_PIPELINE_BIND_POINT_COMPUTE accesses a storage buffer, it mustnot: access values outside of the range of that buffer specified in the currently bound descriptor set</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdCopyBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>srcBuffer</name></param>
+            <param><type>VkBuffer</type> <name>dstBuffer</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkBufferCopy</type>* <name>pRegions</name></param>
+            <validity>
+                <usage>The sum of the pname:srcOffset and pname:copySize members of a given element of pname:pRegions must: be less than or equal to the size of pname:srcBuffer</usage>
+                <usage>The sum of the pname:dstOffset and pname:copySize members of a given element of pname:pRegions must: be less than or equal to the size of pname:dstBuffer</usage>
+                <usage>The union of the source regions, and the union of the destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_SRC_BIT usage flag</usage>
+                <usage>pname:dstBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdCopyImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>srcImage</name></param>
+            <param><type>VkImageLayout</type> <name>srcImageLayout</name></param>
+            <param><type>VkImage</type> <name>dstImage</name></param>
+            <param><type>VkImageLayout</type> <name>dstImageLayout</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkImageCopy</type>* <name>pRegions</name></param>
+            <validity>
+                <usage>The source region specified by a given element of pname:pRegions must: be a region that is contained within pname:srcImage</usage>
+                <usage>The destination region specified by a given element of pname:pRegions must: be a region that is contained within pname:dstImage</usage>
+                <usage>The union of all source regions, and the union of all destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_SRC_BIT usage flag</usage>
+                <usage>pname:srcImageLayout must: specify the layout of the subresources of pname:srcImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:srcImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>pname:dstImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:dstImageLayout must: specify the layout of the subresources of pname:dstImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:dstImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>The elink:VkFormat of each of pname:srcImage and pname:dstImage must: be compatible, as defined &lt;&lt;copies-images-format-compatibility, below&gt;&gt;</usage>
+                <usage>The sample count of pname:srcImage and pname:dstImage must: match</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBlitImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>srcImage</name></param>
+            <param><type>VkImageLayout</type> <name>srcImageLayout</name></param>
+            <param><type>VkImage</type> <name>dstImage</name></param>
+            <param><type>VkImageLayout</type> <name>dstImageLayout</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkImageBlit</type>* <name>pRegions</name></param>
+            <param><type>VkFilter</type> <name>filter</name></param>
+            <validity>
+                <usage>The source region specified by a given element of pname:pRegions must: be a region that is contained within pname:srcImage</usage>
+                <usage>The destination region specified by a given element of pname:pRegions must: be a region that is contained within pname:dstImage</usage>
+                <usage>The union of all source regions, and the union of all destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcImage must: use a format that supports ename:VK_FORMAT_FEATURE_BLIT_SRC_BIT, which is indicated by sname:VkFormatProperties::pname:linearTilingFeatures (for linear tiled images) or sname:VkFormatProperties::pname:optimalTilingFeatures (for optimally tiled images) - as returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>pname:srcImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_SRC_BIT usage flag</usage>
+                <usage>pname:srcImageLayout must: specify the layout of the subresources of pname:srcImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:srcImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>pname:dstImage must: use a format that supports ename:VK_FORMAT_FEATURE_BLIT_DST_BIT, which is indicated by sname:VkFormatProperties::pname:linearTilingFeatures (for linear tiled images) or sname:VkFormatProperties::pname:optimalTilingFeatures (for optimally tiled images) - as returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>pname:dstImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:dstImageLayout must: specify the layout of the subresources of pname:dstImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:dstImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>The sample count of pname:srcImage and pname:dstImage must: both be equal to ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>If either of pname:srcImage or pname:dstImage was created with a signed integer elink:VkFormat, the other must: also have been created with a signed integer elink:VkFormat</usage>
+                <usage>If either of pname:srcImage or pname:dstImage was created with an unsigned integer elink:VkFormat, the other must: also have been created with an unsigned integer elink:VkFormat</usage>
+                <usage>If either of pname:srcImage or pname:dstImage was created with a depth/stencil format, the other must: have exactly the same format</usage>
+                <usage>If pname:srcImage was created with a depth/stencil format, pname:filter must: be ename:VK_FILTER_NEAREST</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdCopyBufferToImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>srcBuffer</name></param>
+            <param><type>VkImage</type> <name>dstImage</name></param>
+            <param><type>VkImageLayout</type> <name>dstImageLayout</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkBufferImageCopy</type>* <name>pRegions</name></param>
+            <validity>
+                <usage>The buffer region specified by a given element of pname:pRegions must: be a region that is contained within pname:srcBuffer</usage>
+                <usage>The image region specified by a given element of pname:pRegions must: be a region that is contained within pname:dstImage</usage>
+                <usage>The union of all source regions, and the union of all destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_SRC_BIT usage flag</usage>
+                <usage>pname:dstImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:dstImage must: have a sample count equal to ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>pname:dstImageLayout must: specify the layout of the subresources of pname:dstImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:dstImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdCopyImageToBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>srcImage</name></param>
+            <param><type>VkImageLayout</type> <name>srcImageLayout</name></param>
+            <param><type>VkBuffer</type> <name>dstBuffer</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkBufferImageCopy</type>* <name>pRegions</name></param>
+            <validity>
+                <usage>The image region specified by a given element of pname:pRegions must: be a region that is contained within pname:srcImage</usage>
+                <usage>The buffer region specified by a given element of pname:pRegions must: be a region that is contained within pname:dstBuffer</usage>
+                <usage>The union of all source regions, and the union of all destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcImage must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_SRC_BIT usage flag</usage>
+                <usage>pname:srcImage must: have a sample count equal to ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>pname:srcImageLayout must: specify the layout of the subresources of pname:srcImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:srcImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>pname:dstBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdUpdateBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>dstBuffer</name></param>
+            <param><type>VkDeviceSize</type> <name>dstOffset</name></param>
+            <param><type>VkDeviceSize</type> <name>dataSize</name></param>
+            <param len="dataSize/4">const <type>uint32_t</type>* <name>pData</name></param>
+            <validity>
+                <usage>The sum of pname:dstOffset and pname:dataSize must: be less than or equal to the size of pname:dstBuffer</usage>
+                <usage>pname:dstBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>The value of pname:dstOffset must: be a multiple of `4`</usage>
+                <usage>The value of pname:dataSize must: be greater than `0`</usage>
+                <usage>The value of pname:dataSize must: be less than `65536`</usage>
+                <usage>The value of pname:dataSize must: be a multiple of `4`</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdFillBuffer</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBuffer</type> <name>dstBuffer</name></param>
+            <param><type>VkDeviceSize</type> <name>dstOffset</name></param>
+            <param><type>VkDeviceSize</type> <name>size</name></param>
+            <param><type>uint32_t</type> <name>data</name></param>
+            <validity>
+                <usage>If pname:size is not equal to ename:VK_WHOLE_SIZE, the sum of pname:dstOffset and pname:size must: be less than or equal to the size of pname:dstBuffer</usage>
+                <usage>pname:dstBuffer must: have been created with pname:VK_BUFFER_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:dstOffset must: be a multiple of `4`</usage>
+                <usage>If pname:size is not equal to ename:VK_WHOLE_SIZE, pname:size must: be a multiple of `4`</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdClearColorImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>image</name></param>
+            <param><type>VkImageLayout</type> <name>imageLayout</name></param>
+            <param>const <type>VkClearColorValue</type>* <name>pColor</name></param>
+            <param><type>uint32_t</type> <name>rangeCount</name></param>
+            <param len="rangeCount">const <type>VkImageSubresourceRange</type>* <name>pRanges</name></param>
+            <validity>
+                <usage>pname:image must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:imageLayout must: specify the layout of the subresource ranges of pname:image specified in pname:pRanges at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:imageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>The image range of any given element of pname:pRanges must: be a subresource range that is contained within pname:image</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdClearDepthStencilImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>image</name></param>
+            <param><type>VkImageLayout</type> <name>imageLayout</name></param>
+            <param>const <type>VkClearDepthStencilValue</type>* <name>pDepthStencil</name></param>
+            <param><type>uint32_t</type> <name>rangeCount</name></param>
+            <param len="rangeCount">const <type>VkImageSubresourceRange</type>* <name>pRanges</name></param>
+            <validity>
+                <usage>pname:image must: have been created with pname:VK_IMAGE_USAGE_TRANSFER_DST_BIT usage flag</usage>
+                <usage>pname:imageLayout must: specify the layout of the subresource ranges of pname:image specified in pname:pRanges at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:imageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>The image range of any given element of pname:pRanges must: be a subresource range that is contained within pname:image</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdClearAttachments</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>attachmentCount</name></param>
+            <param len="attachmentCount">const <type>VkClearAttachment</type>* <name>pAttachments</name></param>
+            <param><type>uint32_t</type> <name>rectCount</name></param>
+            <param len="rectCount">const <type>VkClearRect</type>* <name>pRects</name></param>
+            <validity>
+                <usage>If the pname:aspectMask member of any given element of pname:pAttachments contains ename:VK_IMAGE_ASPECT_COLOR_BIT, the pname:colorAttachment member of those elements must: refer to a valid color attachment in the current subpass</usage>
+                <usage>The rectangular region specified by a given element of pname:pRects must: be contained within the render area of the current render pass instance</usage>
+                <usage>The layers specified by a given element of pname:pRects must: be contained within every attachment that pname:pAttachments refers to</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdResolveImage</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkImage</type> <name>srcImage</name></param>
+            <param><type>VkImageLayout</type> <name>srcImageLayout</name></param>
+            <param><type>VkImage</type> <name>dstImage</name></param>
+            <param><type>VkImageLayout</type> <name>dstImageLayout</name></param>
+            <param><type>uint32_t</type> <name>regionCount</name></param>
+            <param len="regionCount">const <type>VkImageResolve</type>* <name>pRegions</name></param>
+            <validity>
+                <usage>The source region specified by a given element of pname:pRegions must: be a region that is contained within pname:srcImage</usage>
+                <usage>The destination region specified by a given element of pname:pRegions must: be a region that is contained within pname:dstImage</usage>
+                <usage>The union of all source regions, and the union of all destination regions, specified by the elements of pname:pRegions, mustnot: overlap in memory</usage>
+                <usage>pname:srcImage must: have a sample count equal to any valid sample count value other than ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>pname:dstImage must: have a sample count equal to ename:VK_SAMPLE_COUNT_1_BIT</usage>
+                <usage>pname:srcImageLayout must: specify the layout of the subresources of pname:srcImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:srcImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>pname:dstImageLayout must: specify the layout of the subresources of pname:dstImage specified in pname:pRegions at the time this command is executed on a sname:VkDevice</usage>
+                <usage>pname:dstImageLayout must: be either of VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL or VK_IMAGE_LAYOUT_GENERAL</usage>
+                <usage>If pname:dstImage was created with pname:tiling equal to ename:VK_IMAGE_TILING_LINEAR, pname:dstImage must: have been created with a pname:format that supports being a color attachment, as specified by the ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:linearTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+                <usage>If pname:dstImage was created with pname:tiling equal to ename:VK_IMAGE_TILING_OPTIMAL, pname:dstImage must: have been created with a pname:format that supports being a color attachment, as specified by the ename:VK_FORMAT_FEATURE_COLOR_ATTACHMENT_BIT flag in sname:VkFormatProperties::pname:optimalTilingFeatures returned by fname:vkGetPhysicalDeviceFormatProperties</usage>
+
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetEvent</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkEvent</type> <name>event</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>stageMask</name></param>
+            <validity>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:stageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:stageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdResetEvent</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkEvent</type> <name>event</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>stageMask</name></param>
+            <validity>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:stageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:stageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdWaitEvents</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>eventCount</name></param>
+            <param len="eventCount">const <type>VkEvent</type>* <name>pEvents</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>srcStageMask</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>dstStageMask</name></param>
+            <param optional="true"><type>uint32_t</type> <name>memoryBarrierCount</name></param>
+            <param len="memoryBarrierCount">const <type>VkMemoryBarrier</type>* <name>pMemoryBarriers</name></param>
+            <param optional="true"><type>uint32_t</type> <name>bufferMemoryBarrierCount</name></param>
+            <param len="bufferMemoryBarrierCount">const <type>VkBufferMemoryBarrier</type>* <name>pBufferMemoryBarriers</name></param>
+            <param optional="true"><type>uint32_t</type> <name>imageMemoryBarrierCount</name></param>
+            <param len="imageMemoryBarrierCount">const <type>VkImageMemoryBarrier</type>* <name>pImageMemoryBarriers</name></param>
+            <validity>
+                <usage>pname:srcStageMask must: be the bitwise OR of the pname:stageMask parameter used in previous calls to fname:vkCmdSetEvent with any of the members of pname:pEvents</usage>
+                <usage>If fname:vkSetEvent was used to signal any of the events in pname:pEvents, pname:srcStageMask must: include the ename:VK_PIPELINE_STAGE_HOST_BIT flag</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>If pname:pEvents includes one or more events that will be signaled by fname:vkSetEvent after pname:commandBuffer has been submitted to a queue, then fname:vkCmdWaitEvents mustnot: be called inside a render pass instance</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdPipelineBarrier</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>srcStageMask</name></param>
+            <param><type>VkPipelineStageFlags</type> <name>dstStageMask</name></param>
+            <param optional="true"><type>VkDependencyFlags</type> <name>dependencyFlags</name></param>
+            <param optional="true"><type>uint32_t</type> <name>memoryBarrierCount</name></param>
+            <param len="memoryBarrierCount">const <type>VkMemoryBarrier</type>* <name>pMemoryBarriers</name></param>
+            <param optional="true"><type>uint32_t</type> <name>bufferMemoryBarrierCount</name></param>
+            <param len="bufferMemoryBarrierCount">const <type>VkBufferMemoryBarrier</type>* <name>pBufferMemoryBarriers</name></param>
+            <param optional="true"><type>uint32_t</type> <name>imageMemoryBarrierCount</name></param>
+            <param len="imageMemoryBarrierCount">const <type>VkImageMemoryBarrier</type>* <name>pImageMemoryBarriers</name></param>
+            <validity>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-geometryShader,geometry shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_GEOMETRY_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:srcStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>If the &lt;&lt;features-features-tessellationShader,tessellation shaders&gt;&gt; feature is not enabled, pname:dstStageMask mustnot: contain pname:VK_PIPELINE_STAGE_TESSELLATION_CONTROL_SHADER_BIT or pname:VK_PIPELINE_STAGE_TESSELLATION_EVALUATION_SHADER_BIT</usage>
+                <usage>If fname:vkCmdPipelineBarrier is called within a render pass instance, the render pass must: declare at least one self-dependency from the current subpass to itself - see &lt;&lt;synchronization-pipeline-barriers-subpass-self-dependencies,Subpass Self-dependency&gt;&gt;</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBeginQuery</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>query</name></param>
+            <param optional="true"><type>VkQueryControlFlags</type> <name>flags</name></param>
+            <validity>
+                <usage>The query identified by pname:queryPool and pname:query must: currently not be &lt;&lt;queries-operation-active,active&gt;&gt;</usage>
+                <usage>The query identified by pname:queryPool and pname:query must: be unavailable</usage>
+                <usage>If the &lt;&lt;features-features-occlusionQueryPrecise,precise occlusion queries&gt;&gt; feature is not enabled, or the pname:queryType used to create pname:queryPool was not ename:VK_QUERY_TYPE_OCCLUSION, pname:flags mustnot: contain ename:VK_QUERY_CONTROL_PRECISE_BIT</usage>
+                <usage>pname:queryPool must: have been created with a pname:queryType that differs from that of any other queries that have been made &lt;&lt;queries-operation-active,active&gt;&gt;, and are currently still active within pname:commandBuffer</usage>
+                <usage>pname:query must: be less than the number of queries in pname:queryPool</usage>
+                <usage>If the pname:queryType used to create pname:queryPool was ename:VK_QUERY_TYPE_OCCLUSION, the sname:VkCommandPool that pname:commandBuffer was created from must: support graphics operations</usage>
+                <usage>If the pname:queryType used to create pname:queryPool was ename:VK_QUERY_TYPE_PIPELINE_STATISTICS and any of the pname:pipelineStatistics indicate graphics operations, the sname:VkCommandPool that pname:commandBuffer was created from must: support graphics operations</usage>
+                <usage>If the pname:queryType used to create pname:queryPool was ename:VK_QUERY_TYPE_PIPELINE_STATISTICS and any of the pname:pipelineStatistics indicate compute operations, the sname:VkCommandPool that pname:commandBuffer was created from must: support compute operations</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdEndQuery</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>query</name></param>
+            <validity>
+                <usage>The query identified by pname:queryPool and pname:query must: currently be &lt;&lt;queries-operation-active,active&gt;&gt;</usage>
+                <usage>pname:query must: be less than the number of queries in pname:queryPool</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdResetQueryPool</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>firstQuery</name></param>
+            <param><type>uint32_t</type> <name>queryCount</name></param>
+            <validity>
+                <usage>pname:firstQuery must: be less than the number of queries in pname:queryPool</usage>
+                <usage>The sum of pname:firstQuery and pname:queryCount must: be less than or equal to the number of queries in pname:queryPool</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdWriteTimestamp</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPipelineStageFlagBits</type> <name>pipelineStage</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>query</name></param>
+            <validity>
+                <usage>The query identified by pname:queryPool and pname:query must: be _unavailable_</usage>
+                <usage>The command pool's queue family must: support a non-zero value of pname:timestampValidBits</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdCopyQueryPoolResults</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>firstQuery</name></param>
+            <param><type>uint32_t</type> <name>queryCount</name></param>
+            <param><type>VkBuffer</type> <name>dstBuffer</name></param>
+            <param><type>VkDeviceSize</type> <name>dstOffset</name></param>
+            <param><type>VkDeviceSize</type> <name>stride</name></param>
+            <param optional="true"><type>VkQueryResultFlags</type> <name>flags</name></param>
+            <validity>
+                <usage>pname:firstQuery must: be less than the number of queries in pname:queryPool</usage>
+                <usage>The sum of pname:firstQuery and pname:queryCount must: be less than or equal to the number of queries in pname:queryPool</usage>
+                <usage>If ename:VK_QUERY_RESULT_64_BIT is not set in pname:flags then pname:dstOffset and pname:stride must be multiples of `4`</usage>
+                <usage>If ename:VK_QUERY_RESULT_64_BIT is set in pname:flags then pname:dstOffset and pname:stride must be multiples of `8`</usage>
+                <usage>pname:dstBuffer must: have enough storage, from pname:dstOffset, to contain the result of each query, as described &lt;&lt;queries-operation-memorylayout,here&gt;&gt;</usage>
+                <usage>If the pname:queryType used to create pname:queryPool was ename:VK_QUERY_TYPE_TIMESTAMP, pname:flags mustnot: contain ename:VK_QUERY_RESULT_PARTIAL_BIT</usage>
+            </validity>
+        </command>
+        <command queues="graphics,compute" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdPushConstants</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPipelineLayout</type> <name>layout</name></param>
+            <param><type>VkShaderStageFlags</type> <name>stageFlags</name></param>
+            <param><type>uint32_t</type> <name>offset</name></param>
+            <param><type>uint32_t</type> <name>size</name></param>
+            <param len="size">const <type>void</type>* <name>pValues</name></param>
+            <validity>
+                <usage>pname:stageFlags must: match exactly the shader stages used in pname:layout for the range specified by pname:offset and pname:size</usage>
+                <usage>pname:offset must: be a multiple of `4`</usage>
+                <usage>pname:size must: be a multiple of `4`</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary">
+            <proto><type>void</type> <name>vkCmdBeginRenderPass</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkRenderPassBeginInfo</type>* <name>pRenderPassBegin</name></param>
+            <param><type>VkSubpassContents</type> <name>contents</name></param>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary">
+            <proto><type>void</type> <name>vkCmdNextSubpass</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkSubpassContents</type> <name>contents</name></param>
+            <validity>
+                <usage>The current render pass instance mustnot: be in the last subpass, that is - since the call to fname:vkCmdBeginRenderPass, fname:vkCmdNextSubpass must: have been called a number of times at least two less than the number of subpasses in the render pass</usage>
+            </validity>
+        </command>
+        <command queues="graphics" renderpass="inside" cmdbufferlevel="primary">
+            <proto><type>void</type> <name>vkCmdEndRenderPass</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <validity>
+                <usage>The render pass instance that is being ended must: be in the last subpass, that is - since the call to fname:vkCmdBeginRenderPass, fname:vkCmdNextSubpass must: have been called a number of times equal to one less than the number of subpasses in the render pass</usage>
+            </validity>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="both" cmdbufferlevel="primary">
+            <proto><type>void</type> <name>vkCmdExecuteCommands</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>commandBufferCount</name></param>
+            <param len="commandBufferCount">const <type>VkCommandBuffer</type>* <name>pCommandBuffers</name></param>
+            <validity>
+                <usage>pname:commandBuffer must: have been created with a pname:level value of VK_COMMAND_BUFFER_LEVEL_PRIMARY</usage>
+                <usage>Any given element of pname:pCommandBuffers must: have been created with a pname:level value of VK_COMMAND_BUFFER_LEVEL_SECONDARY</usage>
+                <usage>Any given element of pname:pCommandBuffers mustnot: be already pending execution in pname:commandBuffer, or appear twice in pname:pCommandBuffers, unless it was created with the ename:VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT flag</usage>
+                <usage>Any given element of pname:pCommandBuffers mustnot: be already pending execution in any other sname:VkCommandBuffer, unless it was created with the ename:VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT flag</usage>
+                <usage>Any given element of pname:pCommandBuffers must: be in the executable state</usage>
+                <usage>If fname:vkCmdExecuteCommands is being called within a render pass instance, that render pass instance must: have been begun with the pname:contents parameter of fname:vkCmdBeginRenderPass set to ename:VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS</usage>
+                <usage>If fname:vkCmdExecuteCommands is being called within a render pass instance, any given element of pname:pCommandBuffers must: have been recorded with the ename:VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT</usage>
+                <usage>If fname:vkCmdExecuteCommands is being called within a render pass instance, any given element of pname:pCommandBuffers must: have been recorded with the pname:subpass member of the pname:inheritanceInfo structure set to the index of the subpass which the given command buffer will be executed in</usage>
+                <usage>If fname:vkCmdExecuteCommands is being called within a render pass instance, any given element of pname:pCommandBuffers must: have been recorded with a render pass that is compatible with the current render pass - see &lt;&lt;renderpass-compatibility&gt;&gt;</usage>
+                <usage>If fname:vkCmdExecuteCommands is being called within a render pass instance, and any given element of pname:pCommandBuffers was recorded with the pname:framebuffer member of the sname:VkCommandBufferInheritanceInfo structure not equal to sname:VK_NULL_HANDLE, that sname:VkFramebuffer must: be compatible with the sname:VkFramebuffer used in the current render pass instance</usage>
+                <usage>If the &lt;&lt;features-features-inheritedQueries,inherited queries&gt;&gt; feature is not enabled, pname:commandBuffer mustnot: have any queries &lt;&lt;queries-operation-active,active&gt;&gt;</usage>
+                <usage>If pname:commandBuffer has a ename:VK_QUERY_TYPE_OCCLUSION query &lt;&lt;queries-operation-active,active&gt;&gt;, then each element of pname:pCommandBuffers must: have been recorded with sname:VkCommandBufferBeginInfo::pname:occlusionQueryEnable set to ename:VK_TRUE</usage>
+                <usage>If pname:commandBuffer has a ename:VK_QUERY_TYPE_OCCLUSION query &lt;&lt;queries-operation-active,active&gt;&gt;, then each element of pname:pCommandBuffers must: have been recorded with sname:VkCommandBufferBeginInfo::pname:queryFlags having all bits set that are set for the query</usage>
+                <usage>If pname:commandBuffer has a ename:VK_QUERY_TYPE_PIPELINE_STATISTICS query &lt;&lt;queries-operation-active,active&gt;&gt;, then each element of pname:pCommandBuffers must: have been recorded with sname:VkCommandBufferBeginInfo::pname:pipelineStatistics having all bits set that are set in the sname:VkQueryPool the query uses</usage>
+                <usage>Any given element of pname:pCommandBuffers mustnot: begin any query types that are &lt;&lt;queries-operation-active,active&gt;&gt; in pname:commandBuffer</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateAndroidSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkAndroidSurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceDisplayPropertiesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkDisplayPropertiesKHR</type>* <name>pProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceDisplayPlanePropertiesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkDisplayPlanePropertiesKHR</type>* <name>pProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetDisplayPlaneSupportedDisplaysKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>planeIndex</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pDisplayCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkDisplayKHR</type>* <name>pDisplays</name></param>
+            <validity>
+                <usage>pname:planeIndex must: be less than the number of display planes supported by the device as determined by calling fname:vkGetPhysicalDeviceDisplayPlanePropertiesKHR</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetDisplayModePropertiesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkDisplayKHR</type> <name>display</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPropertyCount</name></param>
+            <param optional="true" len="pPropertyCount"><type>VkDisplayModePropertiesKHR</type>* <name>pProperties</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateDisplayModeKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param externsync="true"><type>VkDisplayKHR</type> <name>display</name></param>
+            <param>const <type>VkDisplayModeCreateInfoKHR</type>*<name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDisplayModeKHR</type>* <name>pMode</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetDisplayPlaneCapabilitiesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param externsync="true"><type>VkDisplayModeKHR</type> <name>mode</name></param>
+            <param><type>uint32_t</type> <name>planeIndex</name></param>
+            <param><type>VkDisplayPlaneCapabilitiesKHR</type>* <name>pCapabilities</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateDisplayPlaneSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkDisplaySurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkResult</type> <name>vkCreateSharedSwapchainsKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>uint32_t</type> <name>swapchainCount</name></param>
+            <param len="swapchainCount">const <type>VkSwapchainCreateInfoKHR</type>* <name>pCreateInfos</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param len="swapchainCount"><type>VkSwapchainKHR</type>* <name>pSwapchains</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateMirSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkMirSurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceMirPresentationSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>MirConnection</type>* <name>connection</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command>
+            <proto>void <name>vkDestroySurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param optional="true" externsync="true"><type>VkSurfaceKHR</type> <name>surface</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All sname:VkSwapchainKHR objects created for pname:surface must: have been destroyed prior to destroying pname:surface</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:surface was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:surface was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceSurfaceSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>VkSurfaceKHR</type> <name>surface</name></param>
+            <param><type>VkBool32</type>* <name>pSupported</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceSurfaceCapabilitiesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkSurfaceKHR</type> <name>surface</name></param>
+            <param><type>VkSurfaceCapabilitiesKHR</type>* <name>pSurfaceCapabilities</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceSurfaceFormatsKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkSurfaceKHR</type> <name>surface</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pSurfaceFormatCount</name></param>
+            <param optional="true" len="pSurfaceFormatCount"><type>VkSurfaceFormatKHR</type>* <name>pSurfaceFormats</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceSurfacePresentModesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>VkSurfaceKHR</type> <name>surface</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pPresentModeCount</name></param>
+            <param optional="true" len="pPresentModeCount"><type>VkPresentModeKHR</type>* <name>pPresentModes</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateSwapchainKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param>const <type>VkSwapchainCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSwapchainKHR</type>* <name>pSwapchain</name></param>
+        </command>
+        <command>
+            <proto>void <name>vkDestroySwapchainKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true" externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+                <usage>All uses of presentable images acquired from pname:swapchain and owned by the application must: have completed execution</usage>
+                <usage>If sname:VkAllocationCallbacks were provided when pname:swapchain was created, a compatible set of callbacks must: be provided here</usage>
+                <usage>If no sname:VkAllocationCallbacks were provided when pname:swapchain was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetSwapchainImagesKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkSwapchainKHR</type> <name>swapchain</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pSwapchainImageCount</name></param>
+            <param optional="true" len="pSwapchainImageCount"><type>VkImage</type>* <name>pSwapchainImages</name></param>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkAcquireNextImageKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></param>
+            <param><type>uint64_t</type> <name>timeout</name></param>
+            <param optional="true"><type>VkSemaphore</type> <name>semaphore</name></param>
+            <param optional="true"><type>VkFence</type> <name>fence</name></param>
+            <param><type>uint32_t</type>* <name>pImageIndex</name></param>
+            <validity>
+                <usage>If pname:semaphore is not sname:VK_NULL_HANDLE it must: be unsignalled</usage>
+                <usage>If pname:fence is not sname:VK_NULL_HANDLE it must: be unsignalled and mustnot: be associated with any other queue command that has not yet completed execution on that queue</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkQueuePresentKHR</name></proto>
+            <param externsync="true"><type>VkQueue</type> <name>queue</name></param>
+            <param>const <type>VkPresentInfoKHR</type>* <name>pPresentInfo</name></param>
+            <validity>
+                <usage>Any given element of pname:pSwapchains member of pname:pPresentInfo must: be a swapchain that is created for a surface for which presentation is supported from pname:queue as determined using a call to fname:vkGetPhysicalDeviceSurfaceSupportKHR</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateWaylandSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkWaylandSurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceWaylandPresentationSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param>struct <type>wl_display</type>* <name>display</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateWin32SurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkWin32SurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceWin32PresentationSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateXlibSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkXlibSurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceXlibPresentationSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>Display</type>* <name>dpy</name></param>
+            <param><type>VisualID</type> <name>visualID</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateXcbSurfaceKHR</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkXcbSurfaceCreateInfoKHR</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceXcbPresentationSupportKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>xcb_connection_t</type>* <name>connection</name></param>
+            <param><type>xcb_visualid_t</type> <name>visual_id</name></param>
+            <validity>
+                <usage>pname:queueFamilyIndex must: be less than the value of pname:pQueueFamilyPropertyCount returned by fname:vkGetPhysicalDeviceQueueFamilyProperties for the given pname:physicalDevice</usage>
+            </validity>
+        </command>
+        <command>
+            <proto><type>VkResult</type> <name>vkCreateDebugReportCallbackEXT</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkDebugReportCallbackCreateInfoEXT</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkDebugReportCallbackEXT</type>* <name>pCallback</name></param>
+        </command>
+        <command>
+            <proto>void <name>vkDestroyDebugReportCallbackEXT</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param externsync="true"><type>VkDebugReportCallbackEXT</type> <name>callback</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <validity>
+               <usage>If sname:VkAllocationCallbacks were provided when pname:instance was created, a compatible set of callbacks must: be provided here</usage>
+               <usage>If no sname:VkAllocationCallbacks were provided when pname:instance was created, pname:pAllocator must: be `NULL`</usage>
+            </validity>
+        </command>
+        <command>
+            <proto>void <name>vkDebugReportMessageEXT</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param><type>VkDebugReportFlagsEXT</type> <name>flags</name></param>
+            <param><type>VkDebugReportObjectTypeEXT</type> <name>objectType</name></param>
+            <param><type>uint64_t</type> <name>object</name></param>
+            <param><type>size_t</type> <name>location</name></param>
+            <param><type>int32_t</type> <name>messageCode</name></param>
+            <param>const <type>char</type>* <name>pLayerPrefix</name></param>
+            <param>const <type>char</type>* <name>pMessage</name></param>
+        </command>
+    </commands>
+
+    <!-- SECTION: Vulkan API interface definitions -->
+    <feature api="vulkan" name="VK_VERSION_1_0" number="1.0">
+        <require comment="Header boilerplate">
+            <type name="vk_platform"/>
+        </require>
+        <require comment="API version">
+            <type name="VK_API_VERSION"/>
+        </require>
+        <require comment="API constants">
+            <enum name="VK_LOD_CLAMP_NONE"/>
+            <enum name="VK_REMAINING_MIP_LEVELS"/>
+            <enum name="VK_REMAINING_ARRAY_LAYERS"/>
+            <enum name="VK_WHOLE_SIZE"/>
+            <enum name="VK_ATTACHMENT_UNUSED"/>
+            <enum name="VK_TRUE"/>
+            <enum name="VK_FALSE"/>
+            <type name="VK_NULL_HANDLE"/>
+            <enum name="VK_QUEUE_FAMILY_IGNORED"/>
+            <enum name="VK_SUBPASS_EXTERNAL"/>
+            <type name="VkPipelineCacheHeaderVersion"/>
+        </require>
+        <require comment="Device initialization">
+            <command name="vkCreateInstance"/>
+            <command name="vkDestroyInstance"/>
+            <command name="vkEnumeratePhysicalDevices"/>
+            <command name="vkGetPhysicalDeviceFeatures"/>
+            <command name="vkGetPhysicalDeviceFormatProperties"/>
+            <command name="vkGetPhysicalDeviceImageFormatProperties"/>
+            <command name="vkGetPhysicalDeviceProperties"/>
+            <command name="vkGetPhysicalDeviceQueueFamilyProperties"/>
+            <command name="vkGetPhysicalDeviceMemoryProperties"/>
+            <command name="vkGetInstanceProcAddr"/>
+            <command name="vkGetDeviceProcAddr"/>
+        </require>
+        <require comment="Device commands">
+            <command name="vkCreateDevice"/>
+            <command name="vkDestroyDevice"/>
+        </require>
+        <require comment="Extension discovery commands">
+            <command name="vkEnumerateInstanceExtensionProperties"/>
+            <command name="vkEnumerateDeviceExtensionProperties"/>
+        </require>
+        <require comment="Layer discovery commands">
+            <command name="vkEnumerateInstanceLayerProperties"/>
+            <command name="vkEnumerateDeviceLayerProperties"/>
+        </require>
+        <require comment="queue commands">
+            <command name="vkGetDeviceQueue"/>
+            <command name="vkQueueSubmit"/>
+            <command name="vkQueueWaitIdle"/>
+            <command name="vkDeviceWaitIdle"/>
+        </require>
+        <require comment="Memory commands">
+            <command name="vkAllocateMemory"/>
+            <command name="vkFreeMemory"/>
+            <command name="vkMapMemory"/>
+            <command name="vkUnmapMemory"/>
+            <command name="vkFlushMappedMemoryRanges"/>
+            <command name="vkInvalidateMappedMemoryRanges"/>
+            <command name="vkGetDeviceMemoryCommitment"/>
+        </require>
+        <require comment="Memory management API commands">
+            <command name="vkBindBufferMemory"/>
+            <command name="vkBindImageMemory"/>
+            <command name="vkGetBufferMemoryRequirements"/>
+            <command name="vkGetImageMemoryRequirements"/>
+        </require>
+        <require comment="Sparse resource memory management API commands">
+            <command name="vkGetImageSparseMemoryRequirements"/>
+            <command name="vkGetPhysicalDeviceSparseImageFormatProperties"/>
+            <command name="vkQueueBindSparse"/>
+        </require>
+        <require comment="Fence commands">
+            <command name="vkCreateFence"/>
+            <command name="vkDestroyFence"/>
+            <command name="vkResetFences"/>
+            <command name="vkGetFenceStatus"/>
+            <command name="vkWaitForFences"/>
+        </require>
+        <require comment="Queue semaphore commands">
+            <command name="vkCreateSemaphore"/>
+            <command name="vkDestroySemaphore"/>
+        </require>
+        <require comment="Event commands">
+            <command name="vkCreateEvent"/>
+            <command name="vkDestroyEvent"/>
+            <command name="vkGetEventStatus"/>
+            <command name="vkSetEvent"/>
+            <command name="vkResetEvent"/>
+        </require>
+        <require comment="Query commands">
+            <command name="vkCreateQueryPool"/>
+            <command name="vkDestroyQueryPool"/>
+            <command name="vkGetQueryPoolResults"/>
+        </require>
+        <require comment="Buffer commands">
+            <command name="vkCreateBuffer"/>
+            <command name="vkDestroyBuffer"/>
+        </require>
+        <require comment="Buffer view commands">
+            <command name="vkCreateBufferView"/>
+            <command name="vkDestroyBufferView"/>
+        </require>
+        <require comment="Image commands">
+            <command name="vkCreateImage"/>
+            <command name="vkDestroyImage"/>
+            <command name="vkGetImageSubresourceLayout"/>
+        </require>
+        <require comment="Image view commands">
+            <command name="vkCreateImageView"/>
+            <command name="vkDestroyImageView"/>
+        </require>
+        <require comment="Shader commands">
+            <command name="vkCreateShaderModule"/>
+            <command name="vkDestroyShaderModule"/>
+        </require>
+        <require comment="Pipeline Cache commands">
+            <command name="vkCreatePipelineCache"/>
+            <command name="vkDestroyPipelineCache"/>
+            <command name="vkGetPipelineCacheData"/>
+            <command name="vkMergePipelineCaches"/>
+        </require>
+
+        <require comment="Pipeline commands">
+            <command name="vkCreateGraphicsPipelines"/>
+            <command name="vkCreateComputePipelines"/>
+            <command name="vkDestroyPipeline"/>
+        </require>
+        <require comment="Pipeline layout commands">
+            <command name="vkCreatePipelineLayout"/>
+            <command name="vkDestroyPipelineLayout"/>
+        </require>
+        <require comment="Sampler commands">
+            <command name="vkCreateSampler"/>
+            <command name="vkDestroySampler"/>
+        </require>
+        <require comment="Descriptor set commands">
+            <command name="vkCreateDescriptorSetLayout"/>
+            <command name="vkDestroyDescriptorSetLayout"/>
+            <command name="vkCreateDescriptorPool"/>
+            <command name="vkDestroyDescriptorPool"/>
+            <command name="vkResetDescriptorPool"/>
+            <command name="vkAllocateDescriptorSets"/>
+            <command name="vkFreeDescriptorSets"/>
+            <command name="vkUpdateDescriptorSets"/>
+        </require>
+        <require comment="Pass commands">
+            <command name="vkCreateFramebuffer"/>
+            <command name="vkDestroyFramebuffer"/>
+            <command name="vkCreateRenderPass"/>
+            <command name="vkDestroyRenderPass"/>
+            <command name="vkGetRenderAreaGranularity"/>
+        </require>
+        <require comment="Command pool commands">
+            <command name="vkCreateCommandPool"/>
+            <command name="vkDestroyCommandPool"/>
+            <command name="vkResetCommandPool"/>
+        </require>
+        <require comment="Command buffer commands">
+            <command name="vkAllocateCommandBuffers"/>
+            <command name="vkFreeCommandBuffers"/>
+            <command name="vkBeginCommandBuffer"/>
+            <command name="vkEndCommandBuffer"/>
+            <command name="vkResetCommandBuffer"/>
+        </require>
+        <require comment="Command buffer building commands">
+            <command name="vkCmdBindPipeline"/>
+            <command name="vkCmdSetViewport"/>
+            <command name="vkCmdSetScissor"/>
+            <command name="vkCmdSetLineWidth"/>
+            <command name="vkCmdSetDepthBias"/>
+            <command name="vkCmdSetBlendConstants"/>
+            <command name="vkCmdSetDepthBounds"/>
+            <command name="vkCmdSetStencilCompareMask"/>
+            <command name="vkCmdSetStencilWriteMask"/>
+            <command name="vkCmdSetStencilReference"/>
+            <command name="vkCmdBindDescriptorSets"/>
+            <command name="vkCmdBindIndexBuffer"/>
+            <command name="vkCmdBindVertexBuffers"/>
+            <command name="vkCmdDraw"/>
+            <command name="vkCmdDrawIndexed"/>
+            <command name="vkCmdDrawIndirect"/>
+            <command name="vkCmdDrawIndexedIndirect"/>
+            <command name="vkCmdDispatch"/>
+            <command name="vkCmdDispatchIndirect"/>
+            <command name="vkCmdCopyBuffer"/>
+            <command name="vkCmdCopyImage"/>
+            <command name="vkCmdBlitImage"/>
+            <command name="vkCmdCopyBufferToImage"/>
+            <command name="vkCmdCopyImageToBuffer"/>
+            <command name="vkCmdUpdateBuffer"/>
+            <command name="vkCmdFillBuffer"/>
+            <command name="vkCmdClearColorImage"/>
+            <command name="vkCmdClearDepthStencilImage"/>
+            <command name="vkCmdClearAttachments"/>
+            <command name="vkCmdResolveImage"/>
+            <command name="vkCmdSetEvent"/>
+            <command name="vkCmdResetEvent"/>
+            <command name="vkCmdWaitEvents"/>
+            <command name="vkCmdPipelineBarrier"/>
+            <command name="vkCmdBeginQuery"/>
+            <command name="vkCmdEndQuery"/>
+            <command name="vkCmdResetQueryPool"/>
+            <command name="vkCmdWriteTimestamp"/>
+            <command name="vkCmdCopyQueryPoolResults"/>
+            <command name="vkCmdPushConstants"/>
+            <command name="vkCmdBeginRenderPass"/>
+            <command name="vkCmdNextSubpass"/>
+            <command name="vkCmdEndRenderPass"/>
+            <command name="vkCmdExecuteCommands"/>
+        </require>
+        <require comment="Types not directly used by the API">
+            <!-- Include <type name="typename"/> here for e.g. structs that
+                 are not parameter types of commands, but still need to be
+                 defined in the API.
+             -->
+            <type name="VkBufferMemoryBarrier"/>
+            <type name="VkDispatchIndirectCommand"/>
+            <type name="VkDrawIndexedIndirectCommand"/>
+            <type name="VkDrawIndirectCommand"/>
+            <type name="VkImageMemoryBarrier"/>
+            <type name="VkMemoryBarrier"/>
+        </require>
+    </feature>
+
+    <!-- SECTION: Vulkan extension interface definitions (none yet) -->
+    <extensions>
+            <!-- WSI extensions -->
+        <extension name="VK_KHR_surface" number="1" supported="vulkan">
+            <require>
+                <enum value="25"                                        name="VK_KHR_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_surface&quot;"                name="VK_KHR_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" dir="-" extends="VkResult"             name="VK_ERROR_SURFACE_LOST_KHR"/>
+                <enum offset="1" dir="-" extends="VkResult"             name="VK_ERROR_NATIVE_WINDOW_IN_USE_KHR"/>
+                <command name="vkDestroySurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceSurfaceSupportKHR"/>
+                <command name="vkGetPhysicalDeviceSurfaceCapabilitiesKHR"/>
+                <command name="vkGetPhysicalDeviceSurfaceFormatsKHR"/>
+                <command name="vkGetPhysicalDeviceSurfacePresentModesKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_swapchain" number="2" supported="vulkan">
+            <require>
+                <enum value="67"                                        name="VK_KHR_SWAPCHAIN_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_swapchain&quot;"              name="VK_KHR_SWAPCHAIN_EXTENSION_NAME"/>
+                <enum offset="0"         extends="VkStructureType"      name="VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR"/>
+                <enum offset="1"         extends="VkStructureType"      name="VK_STRUCTURE_TYPE_PRESENT_INFO_KHR"/>
+                <enum offset="2"         extends="VkImageLayout"        name="VK_IMAGE_LAYOUT_PRESENT_SRC_KHR"/>
+                <enum offset="3"         extends="VkResult"             name="VK_SUBOPTIMAL_KHR"/>
+                <enum offset="4" dir="-" extends="VkResult"             name="VK_ERROR_OUT_OF_DATE_KHR"/>
+                <command name="vkCreateSwapchainKHR"/>
+                <command name="vkDestroySwapchainKHR"/>
+                <command name="vkGetSwapchainImagesKHR"/>
+                <command name="vkAcquireNextImageKHR"/>
+                <command name="vkQueuePresentKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_display" number="3" supported="vulkan">
+            <require>
+                <enum value="21"                                        name="VK_KHR_DISPLAY_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_display&quot;"                name="VK_KHR_DISPLAY_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_DISPLAY_MODE_CREATE_INFO_KHR"/>
+                <enum offset="1" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_DISPLAY_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkDisplayPlaneAlphaFlagBitsKHR"/>
+                <type name="VkDisplayPropertiesKHR"/>
+                <type name="VkDisplayModeParametersKHR"/>
+                <type name="VkDisplayModePropertiesKHR"/>
+                <type name="VkDisplayModeCreateInfoKHR"/>
+                <type name="VkDisplayPlaneCapabilitiesKHR"/>
+                <type name="VkDisplayPlanePropertiesKHR"/>
+                <type name="VkDisplaySurfaceCreateInfoKHR"/>
+                <command name="vkGetPhysicalDeviceDisplayPropertiesKHR"/>
+                <command name="vkGetPhysicalDeviceDisplayPlanePropertiesKHR"/>
+                <command name="vkGetDisplayPlaneSupportedDisplaysKHR"/>
+                <command name="vkGetDisplayModePropertiesKHR"/>
+                <command name="vkCreateDisplayModeKHR"/>
+                <command name="vkGetDisplayPlaneCapabilitiesKHR"/>
+                <command name="vkCreateDisplayPlaneSurfaceKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_display_swapchain" number="4" supported="vulkan">
+            <require>
+                <enum value="9"                                         name="VK_KHR_DISPLAY_SWAPCHAIN_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_display_swapchain&quot;"      name="VK_KHR_DISPLAY_SWAPCHAIN_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_DISPLAY_PRESENT_INFO_KHR"/>
+                <enum offset="1" dir="-" extends="VkResult"             name="VK_ERROR_INCOMPATIBLE_DISPLAY_KHR"/>
+                <type name="VkDisplayPresentInfoKHR"/>
+                <command name="vkCreateSharedSwapchainsKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_xlib_surface" number="5" protect="VK_USE_PLATFORM_XLIB_KHR" supported="vulkan">
+            <require>
+                <enum value="6"                                         name="VK_KHR_XLIB_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_xlib_surface&quot;"           name="VK_KHR_XLIB_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkXlibSurfaceCreateFlagsKHR"/>
+                <type name="VkXlibSurfaceCreateInfoKHR"/>
+                <command name="vkCreateXlibSurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceXlibPresentationSupportKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_xcb_surface" number="6" protect="VK_USE_PLATFORM_XCB_KHR" supported="vulkan">
+            <require>
+                <enum value="6"                                         name="VK_KHR_XCB_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_xcb_surface&quot;"            name="VK_KHR_XCB_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkXcbSurfaceCreateFlagsKHR"/>
+                <type name="VkXcbSurfaceCreateInfoKHR"/>
+                <command name="vkCreateXcbSurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceXcbPresentationSupportKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_wayland_surface" number="7" protect="VK_USE_PLATFORM_WAYLAND_KHR" supported="vulkan">
+            <require>
+                <enum value="5"                                         name="VK_KHR_WAYLAND_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_wayland_surface&quot;"        name="VK_KHR_WAYLAND_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkWaylandSurfaceCreateFlagsKHR"/>
+                <type name="VkWaylandSurfaceCreateInfoKHR"/>
+                <command name="vkCreateWaylandSurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceWaylandPresentationSupportKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_mir_surface" number="8" protect="VK_USE_PLATFORM_MIR_KHR" supported="vulkan">
+            <require>
+                <enum value="4"                                         name="VK_KHR_MIR_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_mir_surface&quot;"            name="VK_KHR_MIR_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_MIR_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkMirSurfaceCreateFlagsKHR"/>
+                <type name="VkMirSurfaceCreateInfoKHR"/>
+                <command name="vkCreateMirSurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceMirPresentationSupportKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_android_surface" number="9" protect="VK_USE_PLATFORM_ANDROID_KHR" supported="vulkan">
+            <require>
+                <enum value="6"                                         name="VK_KHR_ANDROID_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_android_surface&quot;"        name="VK_KHR_ANDROID_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkAndroidSurfaceCreateFlagsKHR"/>
+                <type name="VkAndroidSurfaceCreateInfoKHR"/>
+                <command name="vkCreateAndroidSurfaceKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_win32_surface" number="10" protect="VK_USE_PLATFORM_WIN32_KHR" supported="vulkan">
+            <require>
+                <enum value="5"                                         name="VK_KHR_WIN32_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_win32_surface&quot;"          name="VK_KHR_WIN32_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR"/>
+                <type name="VkWin32SurfaceCreateFlagsKHR"/>
+                <type name="VkWin32SurfaceCreateInfoKHR"/>
+                <command name="vkCreateWin32SurfaceKHR"/>
+                <command name="vkGetPhysicalDeviceWin32PresentationSupportKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_ANDROID_native_buffer" number="11" supported="disabled">
+            <require>
+                <enum value="4"                                         name="VK_ANDROID_NATIVE_BUFFER_SPEC_VERSION"/>
+                <enum value="11"                                        name="VK_ANDROID_NATIVE_BUFFER_NUMBER"/>
+                <enum value="&quot;VK_ANDROID_native_buffer&quot;"      name="VK_ANDROID_NATIVE_BUFFER_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_debug_report" number="12" author="Google, Inc." contact="Courtney Goeltzenleuchter @courtney" supported="vulkan">
+            <require>
+                <enum value="1"                                         name="VK_EXT_DEBUG_REPORT_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_debug_report&quot;"           name="VK_EXT_DEBUG_REPORT_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT"/>
+                <enum offset="1" dir="-" extends="VkResult"             name="VK_ERROR_VALIDATION_FAILED_EXT"/>
+                <type name="VkDebugReportObjectTypeEXT"/>
+                <type name="VkDebugReportErrorEXT"/>
+                <command name="vkCreateDebugReportCallbackEXT"/>
+                <command name="vkDestroyDebugReportCallbackEXT"/>
+                <command name="vkDebugReportMessageEXT"/>
+            </require>
+        </extension>
+    </extensions>
+</registry>