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diff --git a/DynamicTablesPkg/Library/Common/DynamicPlatRepoLib/DynamicPlatRepoInternal.h b/DynamicTablesPkg/Library/Common/DynamicPlatRepoLib/DynamicPlatRepoInternal.h
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+++ b/DynamicTablesPkg/Library/Common/DynamicPlatRepoLib/DynamicPlatRepoInternal.h
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+/** @file
+  Dynamic Platform Info Repository Internal
+
+  Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Glossary:
+    - Cm or CM   - Configuration Manager
+    - Obj or OBJ - Object
+**/
+
+#ifndef DYNAMIC_PLAT_REPO_INTERNAL_H_
+#define DYNAMIC_PLAT_REPO_INTERNAL_H_
+
+#include "TokenMapper.h"
+
+#pragma pack(1)
+
+/** CmObj node.
+
+  This is a node wrapper around the CM_OBJ_DESCRIPTOR structure.
+  It also allows to bind a token to the CM_OBJ_DESCRIPTOR.
+*/
+typedef struct CmObjectNode {
+  /// This must be the first field in this structure.
+  LIST_ENTRY           Link;
+
+  /// Token associated with the CmObjDesc.
+  CM_OBJECT_TOKEN      Token;
+
+  /// CmObjDesc wrapped.
+  /// Note: the CM_OBJ_DESCRIPTOR.Data field is allocated and copied.
+  CM_OBJ_DESCRIPTOR    CmObjDesc;
+} CM_OBJ_NODE;
+
+/** Dynamic repository states.
+
+  The states must progress as:
+  UnInitialised -> Transient -> Finalized
+*/
+typedef enum DynRepoState {
+  DynRepoUnInitialised, ///< Un-Initialised state
+  DynRepoTransient,     ///< Transient state - CmObjects can be added.
+  DynRepoFinalized,     ///< Repo Locked - No further CmObjects can be added.
+                        ///< Getting objects is now possible.
+  DynRepoMax            ///< Max value.
+} EDYNAMIC_REPO_STATE;
+
+/** A structure describing the platform configuration
+    manager repository information
+*/
+typedef struct DynamicPlatformRepositoryInfo {
+  /// Repo state machine.
+  EDYNAMIC_REPO_STATE    RepoState;
+
+  /// Count of all the objects added to the Dynamic Platform Repo
+  /// during the Transient state.
+  UINTN                  ObjectCount;
+
+  /// Link lists of CmObj from the ArmNameSpace
+  /// that are added in the Transient state.
+  LIST_ENTRY             ArmCmObjList[EArmObjMax];
+
+  /// Structure Members used in Finalized state.
+  /// An array of CmObj Descriptors from the ArmNameSpace
+  /// This array is populated when the Repo is finalized.
+  CM_OBJ_DESCRIPTOR      ArmCmObjArray[EArmObjMax];
+
+  /// A token mapper for the objects in the ArmNamespaceObjectArray
+  /// The Token mapper is populated when the Repo is finalized in
+  /// a call to DynamicPlatRepoFinalise ().
+  TOKEN_MAPPER           TokenMapper;
+} DYNAMIC_PLATFORM_REPOSITORY_INFO;
+
+#pragma pack()
+
+#endif // DYNAMIC_PLAT_REPO_INTERNAL_H_