Index: Include/Guid/PropertiesTable.h
===================================================================
--- Include/Guid/PropertiesTable.h	(revision 0)
+++ Include/Guid/PropertiesTable.h	(working copy)
@@ -0,0 +1,37 @@
+/** @file
+  GUIDs used for UEFI Properties Table in the UEFI 2.5 specification.
+
+  Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __EFI_PROPERTIES_TABLE_H__
+#define __EFI_PROPERTIES_TABLE_H__
+
+#define EFI_PROPERTIES_TABLE_GUID {\
+  0x880aaca3, 0x4adc, 0x4a04, {0x90, 0x79, 0xb7, 0x47, 0x34, 0x8, 0x25, 0xe5} \
+}
+
+typedef struct {
+  UINT32    Version;
+  UINT32    Length;
+  UINT64    MemoryProtectionAttribute;
+} EFI_PROPERTIES_TABLE;
+
+#define EFI_PROPERTIES_TABLE_VERSION  0x00010000
+
+//
+// Memory attribute (Not defined bit is reserved)
+//
+#define EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA        0x1
+
+extern EFI_GUID gEfiPropertiesTableGuid;
+
+#endif
Index: MdePkg.dec
===================================================================
--- MdePkg.dec	(revision 17518)
+++ MdePkg.dec	(working copy)
@@ -554,6 +554,10 @@
   #
   # GUIDs defined in UEFI2.5
   #
+  
+  ## Include/Guid/PropertiesTable.h
+  gEfiPropertiesTableGuid        = { 0x880aaca3, 0x4adc, 0x4a04, {0x90, 0x79, 0xb7, 0x47, 0x34, 0x8, 0x25, 0xe5 }}
+
   ## Include/Guid/SystemResourceTable.h
   gEfiSystemResourceTableGuid    = { 0xb122a263, 0x3661, 0x4f68, {0x99, 0x29, 0x78, 0xf8, 0xb0, 0xd6, 0x21, 0x80 }}