diff --git a/include/vulkan/vulkan.h b/include/vulkan/vulkan.h
index aa85875..1ac55df 100644
--- a/include/vulkan/vulkan.h
+++ b/include/vulkan/vulkan.h
@@ -43,7 +43,7 @@
 #define VK_VERSION_MINOR(version) (((uint32_t)(version) >> 12) & 0x3ff)
 #define VK_VERSION_PATCH(version) ((uint32_t)(version) & 0xfff)
 // Version of this file
-#define VK_HEADER_VERSION 43
+#define VK_HEADER_VERSION 44
 
 
 #define VK_NULL_HANDLE 0
@@ -261,9 +261,6 @@
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_BUFFER_INFO_KHX = 1000071002,
     VK_STRUCTURE_TYPE_EXTERNAL_BUFFER_PROPERTIES_KHX = 1000071003,
     VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES_KHX = 1000071004,
-    VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2_KHX = 1000071005,
-    VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2_KHX = 1000071006,
-    VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2_KHX = 1000071007,
     VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO_KHX = 1000072000,
     VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO_KHX = 1000072001,
     VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO_KHX = 1000072002,
@@ -5688,7 +5685,7 @@
 #endif
 
 #define VK_EXT_hdr_metadata 1
-#define VK_EXT_HDR_METADATA_SPEC_VERSION  0
+#define VK_EXT_HDR_METADATA_SPEC_VERSION  1
 #define VK_EXT_HDR_METADATA_EXTENSION_NAME "VK_EXT_hdr_metadata"
 
 typedef struct VkXYColorEXT {
diff --git a/include/vulkan/vulkan.hpp b/include/vulkan/vulkan.hpp
index f8ead83..efcf39e 100644
--- a/include/vulkan/vulkan.hpp
+++ b/include/vulkan/vulkan.hpp
@@ -42,7 +42,7 @@
 # include <vector>
 #endif /*VULKAN_HPP_DISABLE_ENHANCED_MODE*/
 
-static_assert( VK_HEADER_VERSION ==  43 , "Wrong VK_HEADER_VERSION!" );
+static_assert( VK_HEADER_VERSION ==  44 , "Wrong VK_HEADER_VERSION!" );
 
 // 32-bit vulkan is not typesafe for handles, so don't allow copy constructors on this platform by default.
 // To enable this feature on 32-bit platforms please define VULKAN_HPP_TYPESAFE_CONVERSION
@@ -6229,9 +6229,6 @@
     ePhysicalDeviceExternalBufferInfoKHX = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_BUFFER_INFO_KHX,
     eExternalBufferPropertiesKHX = VK_STRUCTURE_TYPE_EXTERNAL_BUFFER_PROPERTIES_KHX,
     ePhysicalDeviceIdPropertiesKHX = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES_KHX,
-    ePhysicalDeviceProperties2KHX = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2_KHX,
-    eImageFormatProperties2KHX = VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2_KHX,
-    ePhysicalDeviceImageFormatInfo2KHX = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2_KHX,
     eExternalMemoryBufferCreateInfoKHX = VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO_KHX,
     eExternalMemoryImageCreateInfoKHX = VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO_KHX,
     eExportMemoryAllocateInfoKHX = VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO_KHX,
@@ -28608,9 +28605,6 @@
     case StructureType::ePhysicalDeviceExternalBufferInfoKHX: return "PhysicalDeviceExternalBufferInfoKHX";
     case StructureType::eExternalBufferPropertiesKHX: return "ExternalBufferPropertiesKHX";
     case StructureType::ePhysicalDeviceIdPropertiesKHX: return "PhysicalDeviceIdPropertiesKHX";
-    case StructureType::ePhysicalDeviceProperties2KHX: return "PhysicalDeviceProperties2KHX";
-    case StructureType::eImageFormatProperties2KHX: return "ImageFormatProperties2KHX";
-    case StructureType::ePhysicalDeviceImageFormatInfo2KHX: return "PhysicalDeviceImageFormatInfo2KHX";
     case StructureType::eExternalMemoryBufferCreateInfoKHX: return "ExternalMemoryBufferCreateInfoKHX";
     case StructureType::eExternalMemoryImageCreateInfoKHX: return "ExternalMemoryImageCreateInfoKHX";
     case StructureType::eExportMemoryAllocateInfoKHX: return "ExportMemoryAllocateInfoKHX";
diff --git a/layers/linux/VkLayer_core_validation.json b/layers/linux/VkLayer_core_validation.json
index a9f30de..58d3fad 100644
--- a/layers/linux/VkLayer_core_validation.json
+++ b/layers/linux/VkLayer_core_validation.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_core_validation",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_core_validation.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/linux/VkLayer_object_tracker.json b/layers/linux/VkLayer_object_tracker.json
index 3898ec6..e078d73 100644
--- a/layers/linux/VkLayer_object_tracker.json
+++ b/layers/linux/VkLayer_object_tracker.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_object_tracker",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_object_tracker.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/linux/VkLayer_parameter_validation.json b/layers/linux/VkLayer_parameter_validation.json
index 6f5140a..fef9906 100644
--- a/layers/linux/VkLayer_parameter_validation.json
+++ b/layers/linux/VkLayer_parameter_validation.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_parameter_validation",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_parameter_validation.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/linux/VkLayer_swapchain.json b/layers/linux/VkLayer_swapchain.json
index 4c71fcd..ba6c740 100644
--- a/layers/linux/VkLayer_swapchain.json
+++ b/layers/linux/VkLayer_swapchain.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_swapchain",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_swapchain.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/linux/VkLayer_threading.json b/layers/linux/VkLayer_threading.json
index 2e57dad..3293282 100644
--- a/layers/linux/VkLayer_threading.json
+++ b/layers/linux/VkLayer_threading.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_GOOGLE_threading",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_threading.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "Google Validation Layer",
         "instance_extensions": [
diff --git a/layers/linux/VkLayer_unique_objects.json b/layers/linux/VkLayer_unique_objects.json
index 37258a2..cbeb5ad 100644
--- a/layers/linux/VkLayer_unique_objects.json
+++ b/layers/linux/VkLayer_unique_objects.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_GOOGLE_unique_objects",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_unique_objects.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "Google Validation Layer"
     }
diff --git a/layers/windows/VkLayer_core_validation.json b/layers/windows/VkLayer_core_validation.json
index fdc2c29..909da59 100644
--- a/layers/windows/VkLayer_core_validation.json
+++ b/layers/windows/VkLayer_core_validation.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_core_validation",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_core_validation.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/windows/VkLayer_object_tracker.json b/layers/windows/VkLayer_object_tracker.json
index 1747c96..a7e60c1 100644
--- a/layers/windows/VkLayer_object_tracker.json
+++ b/layers/windows/VkLayer_object_tracker.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_object_tracker",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_object_tracker.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/windows/VkLayer_parameter_validation.json b/layers/windows/VkLayer_parameter_validation.json
index bbc51c0..7eacb5f 100644
--- a/layers/windows/VkLayer_parameter_validation.json
+++ b/layers/windows/VkLayer_parameter_validation.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_parameter_validation",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_parameter_validation.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/windows/VkLayer_swapchain.json b/layers/windows/VkLayer_swapchain.json
index 576db80..4ab2a41 100644
--- a/layers/windows/VkLayer_swapchain.json
+++ b/layers/windows/VkLayer_swapchain.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_swapchain",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_swapchain.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Validation Layer",
         "instance_extensions": [
diff --git a/layers/windows/VkLayer_threading.json b/layers/windows/VkLayer_threading.json
index 1dbcd5b..be1310e 100644
--- a/layers/windows/VkLayer_threading.json
+++ b/layers/windows/VkLayer_threading.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_GOOGLE_threading",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_threading.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "Google Validation Layer",
         "instance_extensions": [
diff --git a/layers/windows/VkLayer_unique_objects.json b/layers/windows/VkLayer_unique_objects.json
index c7a4bde..7b862ae 100644
--- a/layers/windows/VkLayer_unique_objects.json
+++ b/layers/windows/VkLayer_unique_objects.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_GOOGLE_unique_objects",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_unique_objects.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "Google Validation Layer"
     }
diff --git a/scripts/generator.py b/scripts/generator.py
index 709ac14..e729b17 100755
--- a/scripts/generator.py
+++ b/scripts/generator.py
@@ -14,13 +14,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import unicode_literals
 import io,os,re,sys
 
 def write( *args, **kwargs ):
-    file = kwargs.pop(u'file',sys.stdout)
-    end = kwargs.pop( u'end',u'\n')
-    file.write( u' '.join([str(arg) for arg in args]) )
-    file.write( end )
+    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 etree Elements into text.
diff --git a/scripts/vk.xml b/scripts/vk.xml
index 54f5797..50cacce 100644
--- a/scripts/vk.xml
+++ b/scripts/vk.xml
@@ -112,7 +112,7 @@
         <type category="define">// Vulkan 1.0 version number
 #define <name>VK_API_VERSION_1_0</name> <type>VK_MAKE_VERSION</type>(1, 0, 0)</type>    <!-- The patch version here should never be set to anything other than 0 -->
         <type category="define">// Version of this file
-#define <name>VK_HEADER_VERSION</name> 43</type>
+#define <name>VK_HEADER_VERSION</name> 44</type>
 
         <type category="define">
 #define <name>VK_DEFINE_HANDLE</name>(object) typedef struct object##_T* object;</type>
@@ -1474,7 +1474,7 @@
         </type>
         <type category="struct" name="VkDisplayPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PRESENT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member validextensionstructs="VkPresentTimesInfoGOOGLE">const <type>void</type>*  <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member validextensionstructs="VkDeviceGroupPresentInfoKHX,VkPresentTimesInfoGOOGLE">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. -->
@@ -2108,7 +2108,7 @@
         </type>
         <type category="struct" name="VkDeviceGroupPresentInfoKHX">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_PRESENT_INFO_KHX"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*  <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member validextensionstructs="VkDisplayPresentInfoKHR,VkPresentTimesInfoGOOGLE">const <type>void</type>*  <name>pNext</name></member> <!-- Pointer to next structure -->
             <member optional="true"><type>uint32_t</type>         <name>swapchainCount</name></member>
             <member len="swapchainCount">const <type>uint32_t</type>* <name>pDeviceMasks</name></member>
             <member><type>VkDeviceGroupPresentModeFlagBitsKHX</type> <name>mode</name></member>
@@ -2176,7 +2176,7 @@
         </type>
         <type category="struct" name="VkPresentTimesInfoGOOGLE">
             <member values="VK_STRUCTURE_TYPE_PRESENT_TIMES_INFO_GOOGLE"><type>VkStructureType</type> <name>sType</name></member>
-            <member validextensionstructs="VkDisplayPresentInfoKHR">const <type>void</type>*  <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member validextensionstructs="VkDisplayPresentInfoKHR,VkDeviceGroupPresentInfoKHX">const <type>void</type>*  <name>pNext</name></member> <!-- Pointer to next structure -->
             <member><type>uint32_t</type>                         <name>swapchainCount</name></member>           <!-- Copy of VkPresentInfoKHR::swapchainCount -->
             <member len="swapchainCount" optional="true">const <type>VkPresentTimeGOOGLE</type>*   <name>pTimes</name></member> <!-- The earliest times to present images -->
         </type>
@@ -5678,9 +5678,6 @@
                 <enum offset="2" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_BUFFER_INFO_KHX"/>
                 <enum offset="3" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_EXTERNAL_BUFFER_PROPERTIES_KHX"/>
                 <enum offset="4" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES_KHX"/>
-                <enum offset="5" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2_KHX"/> <!-- KHX-only.  Remove for KHR -->
-                <enum offset="6" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2_KHX"/> <!-- KHX-only.  Remove for KHR -->
-                <enum offset="7" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2_KHX"/> <!-- KHX-only.  Remove for KHR -->
                 <enum name="VK_LUID_SIZE_KHX"/>
                 <type name="VkExternalMemoryHandleTypeFlagsKHX"/>
                 <type name="VkExternalMemoryHandleTypeFlagBitsKHX"/>
@@ -6061,7 +6058,7 @@
         </extension>
         <extension name="VK_EXT_hdr_metadata" number="106" type="device" author="GOOGLE" contact="Courtney Goeltzenleuchter @courtneygo" supported="vulkan">
             <require>
-                <enum value="0"                                         name="VK_EXT_HDR_METADATA_SPEC_VERSION"/>
+                <enum value="1"                                         name="VK_EXT_HDR_METADATA_SPEC_VERSION"/>
                 <enum value="&quot;VK_EXT_hdr_metadata&quot;"           name="VK_EXT_HDR_METADATA_EXTENSION_NAME"/>
                 <enum offset="0" extends="VkStructureType"              name="VK_STRUCTURE_TYPE_HDR_METADATA_EXT"/>
                 <type name="VkHdrMetadataEXT"/>
@@ -6209,10 +6206,10 @@
                 <enum value="&quot;VK_KHR_extension_128&quot;"          name="VK_KHR_EXTENSION_128_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_129" number="129" author="LUNARG" contact="Mark Young @MarkY_LunarG" supported="disabled">
+        <extension name="VK_KHR_extension_129" number="129" type="instance" author="EXT" contact="Mark Young @MarkY_LunarG" supported="disabled">
             <require>
                 <enum value="0"                                         name="VK_KHR_EXTENSION_129_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_129&quot;"          name="VK_KHR_EXTENSION_129_EXTENSION_NAME"/>
+                <enum value="&quot;VK_KHR_extension_129&quot;"          name="VK_KHR_EXTENSION_129_EXTENSION_NAME"/>
             </require>
         </extension>
         <extension name="VK_KHR_extension_130" number="130" author="KHR" contact="Jesse Hall @jessehall" supported="disabled">
@@ -6221,5 +6218,11 @@
                 <enum value="&quot;VK_KHR_extension_130&quot;"          name="VK_KHR_EXTENSION_130_EXTENSION_NAME"/>
             </require>
         </extension>
+        <extension name="VK_KHR_extension_131" number="131" author="KHR" contact="Jeff Bolz @jbolz" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_KHR_EXTENSION_131_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_extension_131&quot;"          name="VK_KHR_EXTENSION_131_EXTENSION_NAME"/>
+            </require>
+        </extension>
     </extensions>
 </registry>
diff --git a/tests/layers/linux/VkLayer_test.json b/tests/layers/linux/VkLayer_test.json
index ec2bb38..878a3eb 100644
--- a/tests/layers/linux/VkLayer_test.json
+++ b/tests/layers/linux/VkLayer_test.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_test",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_test.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Test Layer",
         "enable_environment": {
diff --git a/tests/layers/linux/VkLayer_wrap_objects.json b/tests/layers/linux/VkLayer_wrap_objects.json
index 351d82d..c531c2b 100644
--- a/tests/layers/linux/VkLayer_wrap_objects.json
+++ b/tests/layers/linux/VkLayer_wrap_objects.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_wrap_objects",
         "type": "GLOBAL",
         "library_path": "./libVkLayer_wrap_objects.so",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Dispatchable Object Wrapping Layer"
     }
diff --git a/tests/layers/windows/VkLayer_test.json b/tests/layers/windows/VkLayer_test.json
index 5066301..0207c23 100644
--- a/tests/layers/windows/VkLayer_test.json
+++ b/tests/layers/windows/VkLayer_test.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_test",
         "type": "GLOBAL",
         "library_path": ".\\libVkLayer_test.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Test Layer",
         "enable_environment": {
diff --git a/tests/layers/windows/VkLayer_wrap_objects.json b/tests/layers/windows/VkLayer_wrap_objects.json
index 40e8c02..9e8133a 100644
--- a/tests/layers/windows/VkLayer_wrap_objects.json
+++ b/tests/layers/windows/VkLayer_wrap_objects.json
@@ -4,7 +4,7 @@
         "name": "VK_LAYER_LUNARG_wrap_objects",
         "type": "GLOBAL",
         "library_path": ".\\VkLayer_wrap_objects.dll",
-        "api_version": "1.0.43",
+        "api_version": "1.0.44",
         "implementation_version": "1",
         "description": "LunarG Dispatchable Object Wrapping Layer"
     }