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diff --git a/MdePkg/Include/Guid/FirmwareFileSystem2.h b/MdePkg/Include/Guid/FirmwareFileSystem2.h
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+/** @file
+  Guid used to define the Firmware File System 2.
+
+  Copyright (c) 2006 - 2007, Intel Corporation
+  All rights reserved. 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.             
+
+  Module Name:  FirmwareFileSystem2.h
+
+  @par Revision Reference:
+  Guids defined in PI 1.0
+
+**/
+
+#ifndef __FIRMWARE_FILE_SYSTEM2_GUID_H__
+#define __FIRMWARE_FILE_SYSTEM2_GUID_H__
+
+// 
+// The firmware volume header contains a data field for 
+// the file system GUID
+// 
+#define EFI_FIRMWARE_FILE_SYSTEM2_GUID \
+  { 0x8c8ce578, 0x8a3d, 0x4f1c, { 0x99, 0x35, 0x89, 0x61, 0x85, 0xc3, 0x2d, 0xd3 } }
+
+//
+// A Volume Top File (VTF) is a file that must be 
+// located such that the last byte of the file is 
+// also the last byte of the firmware volume
+// 
+#define EFI_FFS_VOLUME_TOP_FILE_GUID \
+  { 0x1BA0062E, 0xC779, 0x4582, { 0x85, 0x66, 0x33, 0x6A, 0xE8, 0xF7, 0x8F, 0x9 } }
+
+
+extern EFI_GUID gEfiFirmwareFileSystemGuid;
+extern EFI_GUID gEfiFirmwareVolumeTopFileGuid;
+
+#endif