tools/aapt2/Resources.proto - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 syntax = "proto3";

 import "frameworks/base/tools/aapt2/Configuration.proto";

 package aapt.pb;

 option java_package = "com.android.aapt";
 option optimize_for = LITE_RUNTIME;

 // A string pool that wraps the binary form of the C++ class android::ResStringPool.
 message StringPool {
   bytes data = 1;
 }

 // The position of a declared entity within a file.
 message SourcePosition {
   uint32 line_number = 1;
   uint32 column_number = 2;
 }

 // Developer friendly source file information for an entity in the resource table.
 message Source {
   // The index of the string path within the source string pool of a ResourceTable.
   uint32 path_idx = 1;
   SourcePosition position = 2;
 }

 // Top level message representing a resource table.
 message ResourceTable {
   // The string pool containing source paths referenced throughout the resource table. This does
   // not end up in the final binary ARSC file.
   StringPool source_pool = 1;

   // Resource definitions corresponding to an Android package.
   repeated Package package = 2;
 }

 // A package ID in the range [0x00, 0xff].
 message PackageId {
   uint32 id = 1;
 }

 // Defines resources for an Android package.
 message Package {
   // The package ID of this package, in the range [0x00, 0xff].
   // - ID 0x00 is reserved for shared libraries, or when the ID is assigned at run-time.
   // - ID 0x01 is reserved for the 'android' package (framework).
   // - ID range [0x02, 0x7f) is reserved for auto-assignment to shared libraries at run-time.
   // - ID 0x7f is reserved for the application package.
   // - IDs > 0x7f are reserved for the application as well and are treated as feature splits.
   // This may not be set if no ID was assigned.
   PackageId package_id = 1;

   // The Java compatible Android package name of the app.
   string package_name = 2;

   // The series of types defined by the package.
   repeated Type type = 3;
 }

 // A type ID in the range [0x01, 0xff].
 message TypeId {
   uint32 id = 1;
 }

 // A set of resources grouped under a common type. Such types include string, layout, xml, dimen,
 // attr, etc. This maps to the second part of a resource identifier in Java (R.type.entry).
 message Type {
   // The ID of the type. This may not be set if no ID was assigned.
   TypeId type_id = 1;

   // The name of the type. This corresponds to the 'type' part of a full resource name of the form
   // package:type/entry. The set of legal type names is listed in Resource.cpp.
   string name = 2;

   // The entries defined for this type.
   repeated Entry entry = 3;
 }

 // The Visibility of a symbol/entry (public, private, undefined).
 message Visibility {
   // The visibility of the resource outside of its package.
   enum Level {
     // No visibility was explicitly specified. This is typically treated as private.
     // The distinction is important when two separate R.java files are generated: a public and
     // private one. An unknown visibility, in this case, would cause the resource to be omitted
     // from either R.java.
     UNKNOWN = 0;

     // A resource was explicitly marked as private. This means the resource can not be accessed
     // outside of its package unless the @*package:type/entry notation is used (the asterisk being
     // the private accessor). If two R.java files are generated (private + public), the resource
     // will only be emitted to the private R.java file.
     PRIVATE = 1;

     // A resource was explicitly marked as public. This means the resource can be accessed
     // from any package, and is emitted into all R.java files, public and private.
     PUBLIC = 2;
   }

   Level level = 1;

   // The path at which this entry's visibility was defined (eg. public.xml).
   Source source = 2;

   // The comment associated with the <public> tag.
   string comment = 3;
 }

 // Whether a resource comes from a compile-time overlay and is explicitly allowed to not overlay an
 // existing resource.
 message AllowNew {
   // Where this was defined in source.
   Source source = 1;

   // Any comment associated with the declaration.
   string comment = 2;
 }

 // Whether a resource is overlayable by runtime resource overlays (RRO).
 message Overlayable {
   // Where this declaration was defined in source.
   Source source = 1;

   // Any comment associated with the declaration.
   string comment = 2;
 }

 // An entry ID in the range [0x0000, 0xffff].
 message EntryId {
   uint32 id = 1;
 }

 // An entry declaration. An entry has a full resource ID that is the combination of package ID,
 // type ID, and its own entry ID. An entry on its own has no value, but values are defined for
 // various configurations/variants.
 message Entry {
   // The ID of this entry. Together with the package ID and type ID, this forms a full resource ID
   // of the form 0xPPTTEEEE, where PP is the package ID, TT is the type ID, and EEEE is the entry
   // ID.
   // This may not be set if no ID was assigned.
   EntryId entry_id = 1;

   // The name of this entry. This corresponds to the 'entry' part of a full resource name of the
   // form package:type/entry.
   string name = 2;

   // The visibility of this entry (public, private, undefined).
   Visibility visibility = 3;

   // Whether this resource, when originating from a compile-time overlay, is allowed to NOT overlay
   // any existing resources.
   AllowNew allow_new = 4;

   // Whether this resource can be overlaid by a runtime resource overlay (RRO).
   Overlayable overlayable = 5;

   // The set of values defined for this entry, each corresponding to a different
   // configuration/variant.
   repeated ConfigValue config_value = 6;
 }

 // A Configuration/Value pair.
 message ConfigValue {
   Configuration config = 1;
   Value value = 2;
 }

 // The generic meta-data for every value in a resource table.
 message Value {
   // Where the value was defined.
   Source source = 1;

   // Any comment associated with the value.
   string comment = 2;

   // Whether the value can be overridden.
   bool weak = 3;

   // The value is either an Item or a CompoundValue.
   oneof value {
     Item item = 4;
     CompoundValue compound_value = 5;
   }
 }

 // An Item is an abstract type. It represents a value that can appear inline in many places, such
 // as XML attribute values or on the right hand side of style attribute definitions. The concrete
 // type is one of the types below. Only one can be set.
 message Item {
   oneof value {
     Reference ref = 1;
     String str = 2;
     RawString raw_str = 3;
     StyledString styled_str = 4;
     FileReference file = 5;
     Id id = 6;
     Primitive prim = 7;
   }
 }

 // A CompoundValue is an abstract type. It represents a value that is a made of other values.
 // These can only usually appear as top-level resources. The concrete type is one of the types
 // below. Only one can be set.
 message CompoundValue {
   oneof value {
     Attribute attr = 1;
     Style style = 2;
     Styleable styleable = 3;
     Array array = 4;
     Plural plural = 5;
   }
 }

 // A value that is a reference to another resource. This reference can be by name or resource ID.
 message Reference {
   enum Type {
     // A plain reference (@package:type/entry).
     REFERENCE = 0;

     // A reference to a theme attribute (?package:type/entry).
     ATTRIBUTE = 1;
   }

   Type type = 1;

   // The resource ID (0xPPTTEEEE) of the resource being referred. This is optional.
   uint32 id = 2;

   // The name of the resource being referred. This is optional if the resource ID is set.
   string name = 3;

   // Whether this reference is referencing a private resource (@*package:type/entry).
   bool private = 4;
 }

 // A value that represents an ID. This is just a placeholder, as ID values are used to occupy a
 // resource ID (0xPPTTEEEE) as a unique identifier. Their value is unimportant.
 message Id {
 }

 // A value that is a string.
 message String {
   string value = 1;
 }

 // A value that is a raw string, which is unescaped/uninterpreted. This is typically used to
 // represent the value of a style attribute before the attribute is compiled and the set of
 // allowed values is known.
 message RawString {
   string value = 1;
 }

 // A string with styling information, like html tags that specify boldness, italics, etc.
 message StyledString {
   // The raw text of the string.
   string value = 1;

   // A Span marks a region of the string text that is styled.
   message Span {
     // The name of the tag, and its attributes, encoded as follows:
     // tag_name;attr1=value1;attr2=value2;[...]
     string tag = 1;

     // The first character position this span applies to, in UTF-16 offset.
     uint32 first_char = 2;

     // The last character position this span applies to, in UTF-16 offset.
     uint32 last_char = 3;
   }

   repeated Span span = 2;
 }

 // A value that is a reference to an external entity, like an XML file or a PNG.
 message FileReference {
   enum Type {
     UNKNOWN = 0;
     PNG = 1;
     BINARY_XML = 2;
     PROTO_XML = 3;
   }

   // Path to a file within the APK (typically res/type-config/entry.ext).
   string path = 1;

   // The type of file this path points to. For UAM bundle, this cannot be
   // BINARY_XML.
   Type type = 2;
 }

 // A value that represents a primitive data type (float, int, boolean, etc.).
 message Primitive {
   message NullType {
   }
   message EmptyType {
   }
   oneof oneof_value {
     NullType null_value = 1;
     EmptyType empty_value = 2;
     float float_value = 3;
     float dimension_value = 4;
     float fraction_value = 5;
     int32 int_decimal_value = 6;
     uint32 int_hexadecimal_value = 7;
     bool boolean_value = 8;
     uint32 color_argb8_value = 9;
     uint32 color_rgb8_value = 10;
     uint32 color_argb4_value = 11;
     uint32 color_rgb4_value = 12;
   }
 }

 // A value that represents an XML attribute and what values it accepts.
 message Attribute {
   // A Symbol used to represent an enum or a flag.
   message Symbol {
     // Where the enum/flag item was defined.
     Source source = 1;

     // Any comments associated with the enum or flag.
     string comment = 2;

     // The name of the enum/flag as a reference. Enums/flag items are generated as ID resource
     // values.
     Reference name = 3;

     // The value of the enum/flag.
     uint32 value = 4;
   }

   // Bitmask of formats allowed for an attribute.
   enum FormatFlags {
     NONE = 0x0;          // Proto3 requires a default of 0.
     ANY = 0x0000ffff;    // Allows any type except ENUM and FLAGS.
     REFERENCE = 0x01;    // Allows Reference values.
     STRING = 0x02;       // Allows String/StyledString values.
     INTEGER = 0x04;      // Allows any integer BinaryPrimitive values.
     BOOLEAN = 0x08;      // Allows any boolean BinaryPrimitive values.
     COLOR = 0x010;       // Allows any color BinaryPrimitive values.
     FLOAT = 0x020;       // Allows any float BinaryPrimitive values.
     DIMENSION = 0x040;   // Allows any dimension BinaryPrimitive values.
     FRACTION = 0x080;    // Allows any fraction BinaryPrimitive values.
     ENUM = 0x00010000;   // Allows enums that are defined in the Attribute's symbols.
                          // ENUM and FLAGS cannot BOTH be set.
     FLAGS = 0x00020000;  // Allows flags that are defined in the Attribute's symbols.
                          // ENUM and FLAGS cannot BOTH be set.
   }

   // A bitmask of types that this XML attribute accepts. Corresponds to the flags in the
   // enum FormatFlags.
   uint32 format_flags = 1;

   // The smallest integer allowed for this XML attribute. Only makes sense if the format includes
   // FormatFlags::INTEGER.
   int32 min_int = 2;

   // The largest integer allowed for this XML attribute. Only makes sense if the format includes
   // FormatFlags::INTEGER.
   int32 max_int = 3;

   // The set of enums/flags defined in this attribute. Only makes sense if the format includes
   // either FormatFlags::ENUM or FormatFlags::FLAGS. Having both is an error.
   repeated Symbol symbol = 4;
 }

 // A value that represents a style.
 message Style {
   // An XML attribute/value pair defined in the style.
   message Entry {
     // Where the entry was defined.
     Source source = 1;

     // Any comments associated with the entry.
     string comment = 2;

     // A reference to the XML attribute.
     Reference key = 3;

     // The Item defined for this XML attribute.
     Item item = 4;
   }

   // The optinal style from which this style inherits attributes.
   Reference parent = 1;

   // The source file information of the parent inheritance declaration.
   Source parent_source = 2;

   // The set of XML attribute/value pairs for this style.
   repeated Entry entry = 3;
 }

 // A value that represents a <declare-styleable> XML resource. These are not real resources and
 // only end up as Java fields in the generated R.java. They do not end up in the binary ARSC file.
 message Styleable {
   // An attribute defined for this styleable.
   message Entry {
     // Where the attribute was defined within the <declare-styleable> block.
     Source source = 1;

     // Any comments associated with the declaration.
     string comment = 2;

     // The reference to the attribute.
     Reference attr = 3;
   }

   // The set of attribute declarations.
   repeated Entry entry = 1;
 }

 // A value that represents an array of resource values.
 message Array {
   // A single element of the array.
   message Element {
     // Where the element was defined.
     Source source = 1;

     // Any comments associated with the element.
     string comment = 2;

     // The value assigned to this element.
     Item item = 3;
   }

   // The list of array elements.
   repeated Element element = 1;
 }

 // A value that represents a string and its many variations based on plurality.
 message Plural {
   // The arity of the plural.
   enum Arity {
     ZERO = 0;
     ONE = 1;
     TWO = 2;
     FEW = 3;
     MANY = 4;
     OTHER = 5;
   }

   // The plural value for a given arity.
   message Entry {
     // Where the plural was defined.
     Source source = 1;

     // Any comments associated with the plural.
     string comment = 2;

     // The arity of the plural.
     Arity arity = 3;

     // The value assigned to this plural.
     Item item = 4;
   }

   // The set of arity/plural mappings.
   repeated Entry entry = 1;
 }

 // Defines an abstract XmlNode that must be either an XmlElement, or
 // a text node represented by a string.
 message XmlNode {
   oneof node {
     XmlElement element = 1;
     string text = 2;
   }

   // Source line and column info.
   SourcePosition source = 3;
 }

 // An <element> in an XML document.
 message XmlElement {
   // Namespaces defined on this element.
   repeated XmlNamespace namespace_declaration = 1;

   // The namespace URI of this element.
   string namespace_uri = 2;

   // The name of this element.
   string name = 3;

   // The attributes of this element.
   repeated XmlAttribute attribute = 4;

   // The children of this element.
   repeated XmlNode child = 5;
 }

 // A namespace declaration on an XmlElement (xmlns:android="http://...").
 message XmlNamespace {
   string prefix = 1;
   string uri = 2;

   // Source line and column info.
   SourcePosition source = 3;
 }

 // An attribute defined on an XmlElement (android:text="...").
 message XmlAttribute {
   string namespace_uri = 1;
   string name = 2;
   string value = 3;

   // Source line and column info.
   SourcePosition source = 4;

   // The optional resource ID (0xPPTTEEEE) of the attribute.
   uint32 resource_id = 5;

   // The optional interpreted/compiled version of the `value` string.
   Item compiled_item = 6;
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	syntax = "proto3";

	import "frameworks/base/tools/aapt2/Configuration.proto";

	package aapt.pb;

	option java_package = "com.android.aapt";
	option optimize_for = LITE_RUNTIME;

	// A string pool that wraps the binary form of the C++ class android::ResStringPool.
	message StringPool {
	bytes data = 1;
	}

	// The position of a declared entity within a file.
	message SourcePosition {
	uint32 line_number = 1;
	uint32 column_number = 2;
	}

	// Developer friendly source file information for an entity in the resource table.
	message Source {
	// The index of the string path within the source string pool of a ResourceTable.
	uint32 path_idx = 1;
	SourcePosition position = 2;
	}

	// Top level message representing a resource table.
	message ResourceTable {
	// The string pool containing source paths referenced throughout the resource table. This does
	// not end up in the final binary ARSC file.
	StringPool source_pool = 1;

	// Resource definitions corresponding to an Android package.
	repeated Package package = 2;
	}

	// A package ID in the range [0x00, 0xff].
	message PackageId {
	uint32 id = 1;
	}

	// Defines resources for an Android package.
	message Package {
	// The package ID of this package, in the range [0x00, 0xff].
	// - ID 0x00 is reserved for shared libraries, or when the ID is assigned at run-time.
	// - ID 0x01 is reserved for the 'android' package (framework).
	// - ID range [0x02, 0x7f) is reserved for auto-assignment to shared libraries at run-time.
	// - ID 0x7f is reserved for the application package.
	// - IDs > 0x7f are reserved for the application as well and are treated as feature splits.
	// This may not be set if no ID was assigned.
	PackageId package_id = 1;

	// The Java compatible Android package name of the app.
	string package_name = 2;

	// The series of types defined by the package.
	repeated Type type = 3;
	}

	// A type ID in the range [0x01, 0xff].
	message TypeId {
	uint32 id = 1;
	}

	// A set of resources grouped under a common type. Such types include string, layout, xml, dimen,
	// attr, etc. This maps to the second part of a resource identifier in Java (R.type.entry).
	message Type {
	// The ID of the type. This may not be set if no ID was assigned.
	TypeId type_id = 1;

	// The name of the type. This corresponds to the 'type' part of a full resource name of the form
	// package:type/entry. The set of legal type names is listed in Resource.cpp.
	string name = 2;

	// The entries defined for this type.
	repeated Entry entry = 3;
	}

	// The Visibility of a symbol/entry (public, private, undefined).
	message Visibility {
	// The visibility of the resource outside of its package.
	enum Level {
	// No visibility was explicitly specified. This is typically treated as private.
	// The distinction is important when two separate R.java files are generated: a public and
	// private one. An unknown visibility, in this case, would cause the resource to be omitted
	// from either R.java.
	UNKNOWN = 0;

	// A resource was explicitly marked as private. This means the resource can not be accessed
	// outside of its package unless the @*package:type/entry notation is used (the asterisk being
	// the private accessor). If two R.java files are generated (private + public), the resource
	// will only be emitted to the private R.java file.
	PRIVATE = 1;

	// A resource was explicitly marked as public. This means the resource can be accessed
	// from any package, and is emitted into all R.java files, public and private.
	PUBLIC = 2;
	}

	Level level = 1;

	// The path at which this entry's visibility was defined (eg. public.xml).
	Source source = 2;

	// The comment associated with the <public> tag.
	string comment = 3;
	}

	// Whether a resource comes from a compile-time overlay and is explicitly allowed to not overlay an
	// existing resource.
	message AllowNew {
	// Where this was defined in source.
	Source source = 1;

	// Any comment associated with the declaration.
	string comment = 2;
	}

	// Whether a resource is overlayable by runtime resource overlays (RRO).
	message Overlayable {
	// Where this declaration was defined in source.
	Source source = 1;

	// Any comment associated with the declaration.
	string comment = 2;
	}

	// An entry ID in the range [0x0000, 0xffff].
	message EntryId {
	uint32 id = 1;
	}

	// An entry declaration. An entry has a full resource ID that is the combination of package ID,
	// type ID, and its own entry ID. An entry on its own has no value, but values are defined for
	// various configurations/variants.
	message Entry {
	// The ID of this entry. Together with the package ID and type ID, this forms a full resource ID
	// of the form 0xPPTTEEEE, where PP is the package ID, TT is the type ID, and EEEE is the entry
	// ID.
	// This may not be set if no ID was assigned.
	EntryId entry_id = 1;

	// The name of this entry. This corresponds to the 'entry' part of a full resource name of the
	// form package:type/entry.
	string name = 2;

	// The visibility of this entry (public, private, undefined).
	Visibility visibility = 3;

	// Whether this resource, when originating from a compile-time overlay, is allowed to NOT overlay
	// any existing resources.
	AllowNew allow_new = 4;

	// Whether this resource can be overlaid by a runtime resource overlay (RRO).
	Overlayable overlayable = 5;

	// The set of values defined for this entry, each corresponding to a different
	// configuration/variant.
	repeated ConfigValue config_value = 6;
	}

	// A Configuration/Value pair.
	message ConfigValue {
	Configuration config = 1;
	Value value = 2;
	}

	// The generic meta-data for every value in a resource table.
	message Value {
	// Where the value was defined.
	Source source = 1;

	// Any comment associated with the value.
	string comment = 2;

	// Whether the value can be overridden.
	bool weak = 3;

	// The value is either an Item or a CompoundValue.
	oneof value {
	Item item = 4;
	CompoundValue compound_value = 5;
	}
	}

	// An Item is an abstract type. It represents a value that can appear inline in many places, such
	// as XML attribute values or on the right hand side of style attribute definitions. The concrete
	// type is one of the types below. Only one can be set.
	message Item {
	oneof value {
	Reference ref = 1;
	String str = 2;
	RawString raw_str = 3;
	StyledString styled_str = 4;
	FileReference file = 5;
	Id id = 6;
	Primitive prim = 7;
	}
	}

	// A CompoundValue is an abstract type. It represents a value that is a made of other values.
	// These can only usually appear as top-level resources. The concrete type is one of the types
	// below. Only one can be set.
	message CompoundValue {
	oneof value {
	Attribute attr = 1;
	Style style = 2;
	Styleable styleable = 3;
	Array array = 4;
	Plural plural = 5;
	}
	}

	// A value that is a reference to another resource. This reference can be by name or resource ID.
	message Reference {
	enum Type {
	// A plain reference (@package:type/entry).
	REFERENCE = 0;

	// A reference to a theme attribute (?package:type/entry).
	ATTRIBUTE = 1;
	}

	Type type = 1;

	// The resource ID (0xPPTTEEEE) of the resource being referred. This is optional.
	uint32 id = 2;

	// The name of the resource being referred. This is optional if the resource ID is set.
	string name = 3;

	// Whether this reference is referencing a private resource (@*package:type/entry).
	bool private = 4;
	}

	// A value that represents an ID. This is just a placeholder, as ID values are used to occupy a
	// resource ID (0xPPTTEEEE) as a unique identifier. Their value is unimportant.
	message Id {
	}

	// A value that is a string.
	message String {
	string value = 1;
	}

	// A value that is a raw string, which is unescaped/uninterpreted. This is typically used to
	// represent the value of a style attribute before the attribute is compiled and the set of
	// allowed values is known.
	message RawString {
	string value = 1;
	}

	// A string with styling information, like html tags that specify boldness, italics, etc.
	message StyledString {
	// The raw text of the string.
	string value = 1;

	// A Span marks a region of the string text that is styled.
	message Span {
	// The name of the tag, and its attributes, encoded as follows:
	// tag_name;attr1=value1;attr2=value2;[...]
	string tag = 1;

	// The first character position this span applies to, in UTF-16 offset.
	uint32 first_char = 2;

	// The last character position this span applies to, in UTF-16 offset.
	uint32 last_char = 3;
	}

	repeated Span span = 2;
	}

	// A value that is a reference to an external entity, like an XML file or a PNG.
	message FileReference {
	enum Type {
	UNKNOWN = 0;
	PNG = 1;
	BINARY_XML = 2;
	PROTO_XML = 3;
	}

	// Path to a file within the APK (typically res/type-config/entry.ext).
	string path = 1;

	// The type of file this path points to. For UAM bundle, this cannot be
	// BINARY_XML.
	Type type = 2;
	}

	// A value that represents a primitive data type (float, int, boolean, etc.).
	message Primitive {
	message NullType {
	}
	message EmptyType {
	}
	oneof oneof_value {
	NullType null_value = 1;
	EmptyType empty_value = 2;
	float float_value = 3;
	float dimension_value = 4;
	float fraction_value = 5;
	int32 int_decimal_value = 6;
	uint32 int_hexadecimal_value = 7;
	bool boolean_value = 8;
	uint32 color_argb8_value = 9;
	uint32 color_rgb8_value = 10;
	uint32 color_argb4_value = 11;
	uint32 color_rgb4_value = 12;
	}
	}

	// A value that represents an XML attribute and what values it accepts.
	message Attribute {
	// A Symbol used to represent an enum or a flag.
	message Symbol {
	// Where the enum/flag item was defined.
	Source source = 1;

	// Any comments associated with the enum or flag.
	string comment = 2;

	// The name of the enum/flag as a reference. Enums/flag items are generated as ID resource
	// values.
	Reference name = 3;

	// The value of the enum/flag.
	uint32 value = 4;
	}

	// Bitmask of formats allowed for an attribute.
	enum FormatFlags {
	NONE = 0x0; // Proto3 requires a default of 0.
	ANY = 0x0000ffff; // Allows any type except ENUM and FLAGS.
	REFERENCE = 0x01; // Allows Reference values.
	STRING = 0x02; // Allows String/StyledString values.
	INTEGER = 0x04; // Allows any integer BinaryPrimitive values.
	BOOLEAN = 0x08; // Allows any boolean BinaryPrimitive values.
	COLOR = 0x010; // Allows any color BinaryPrimitive values.
	FLOAT = 0x020; // Allows any float BinaryPrimitive values.
	DIMENSION = 0x040; // Allows any dimension BinaryPrimitive values.
	FRACTION = 0x080; // Allows any fraction BinaryPrimitive values.
	ENUM = 0x00010000; // Allows enums that are defined in the Attribute's symbols.
	// ENUM and FLAGS cannot BOTH be set.
	FLAGS = 0x00020000; // Allows flags that are defined in the Attribute's symbols.
	// ENUM and FLAGS cannot BOTH be set.
	}

	// A bitmask of types that this XML attribute accepts. Corresponds to the flags in the
	// enum FormatFlags.
	uint32 format_flags = 1;

	// The smallest integer allowed for this XML attribute. Only makes sense if the format includes
	// FormatFlags::INTEGER.
	int32 min_int = 2;

	// The largest integer allowed for this XML attribute. Only makes sense if the format includes
	// FormatFlags::INTEGER.
	int32 max_int = 3;

	// The set of enums/flags defined in this attribute. Only makes sense if the format includes
	// either FormatFlags::ENUM or FormatFlags::FLAGS. Having both is an error.
	repeated Symbol symbol = 4;
	}

	// A value that represents a style.
	message Style {
	// An XML attribute/value pair defined in the style.
	message Entry {
	// Where the entry was defined.
	Source source = 1;

	// Any comments associated with the entry.
	string comment = 2;

	// A reference to the XML attribute.
	Reference key = 3;

	// The Item defined for this XML attribute.
	Item item = 4;
	}

	// The optinal style from which this style inherits attributes.
	Reference parent = 1;

	// The source file information of the parent inheritance declaration.
	Source parent_source = 2;

	// The set of XML attribute/value pairs for this style.
	repeated Entry entry = 3;
	}

	// A value that represents a <declare-styleable> XML resource. These are not real resources and
	// only end up as Java fields in the generated R.java. They do not end up in the binary ARSC file.
	message Styleable {
	// An attribute defined for this styleable.
	message Entry {
	// Where the attribute was defined within the <declare-styleable> block.
	Source source = 1;

	// Any comments associated with the declaration.
	string comment = 2;

	// The reference to the attribute.
	Reference attr = 3;
	}

	// The set of attribute declarations.
	repeated Entry entry = 1;
	}

	// A value that represents an array of resource values.
	message Array {
	// A single element of the array.
	message Element {
	// Where the element was defined.
	Source source = 1;

	// Any comments associated with the element.
	string comment = 2;

	// The value assigned to this element.
	Item item = 3;
	}

	// The list of array elements.
	repeated Element element = 1;
	}

	// A value that represents a string and its many variations based on plurality.
	message Plural {
	// The arity of the plural.
	enum Arity {
	ZERO = 0;
	ONE = 1;
	TWO = 2;
	FEW = 3;
	MANY = 4;
	OTHER = 5;
	}

	// The plural value for a given arity.
	message Entry {
	// Where the plural was defined.
	Source source = 1;

	// Any comments associated with the plural.
	string comment = 2;

	// The arity of the plural.
	Arity arity = 3;

	// The value assigned to this plural.
	Item item = 4;
	}

	// The set of arity/plural mappings.
	repeated Entry entry = 1;
	}

	// Defines an abstract XmlNode that must be either an XmlElement, or
	// a text node represented by a string.
	message XmlNode {
	oneof node {
	XmlElement element = 1;
	string text = 2;
	}

	// Source line and column info.
	SourcePosition source = 3;
	}

	// An <element> in an XML document.
	message XmlElement {
	// Namespaces defined on this element.
	repeated XmlNamespace namespace_declaration = 1;

	// The namespace URI of this element.
	string namespace_uri = 2;

	// The name of this element.
	string name = 3;

	// The attributes of this element.
	repeated XmlAttribute attribute = 4;

	// The children of this element.
	repeated XmlNode child = 5;
	}

	// A namespace declaration on an XmlElement (xmlns:android="http://...").
	message XmlNamespace {
	string prefix = 1;
	string uri = 2;

	// Source line and column info.
	SourcePosition source = 3;
	}

	// An attribute defined on an XmlElement (android:text="...").
	message XmlAttribute {
	string namespace_uri = 1;
	string name = 2;
	string value = 3;

	// Source line and column info.
	SourcePosition source = 4;

	// The optional resource ID (0xPPTTEEEE) of the attribute.
	uint32 resource_id = 5;

	// The optional interpreted/compiled version of the `value` string.
	Item compiled_item = 6;
	}