diff -r 000000000000 -r bde4ae8d615e os/persistentdata/persistentstorage/store/pcstore/inc/checkeduid.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/persistentdata/persistentstorage/store/pcstore/inc/checkeduid.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,88 @@
+// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#if !defined(__CHECKEDUID_H__)
+#define __CHECKEDUID_H__
+
+#include <pcstore/pcstoredef.h>
+#include <pcstore/uid.h>
+
+namespace PCStore
+{
+class CDes8;
+
+/**
+@internalComponent
+
+Encapsulates a set of three unique identifiers (UIDs) which, in combination, 
+identify a system object such as a GUI application or a DLL. The three
+component UIDs are referred to as UID1, UID2 and UID3.
+
+An object of this type is referred to as a compound identifier or a UID type.
+*/
+class TUidType
+	{
+public:
+	TUidType();
+	TUidType(TUid aUid1);
+	TUidType(TUid aUid1, TUid aUid2);
+	TUidType(TUid aUid1, TUid aUid2, TUid aUid3);
+	TBool operator !=(const TUidType& aUidType) const;
+	TBool operator ==(const TUidType& aUidType) const ;
+	const TUid& operator[](TInt aIndex) const;
+	TBool IsValid() const ;
+
+private:
+	TUid MostDerived() const;
+
+private:
+	TUid iUid[3];
+	};
+
+
+/**
+@internalComponent
+
+Packages a Uid type together with a checksum.
+
+@see TUidType
+*/
+class TCheckedUid
+	{
+public:
+	TCheckedUid();
+	TCheckedUid(const TUidType& aUidType);
+	TCheckedUid(const CDes8& aDes);
+	
+	void Set(const TUidType& aUidType);
+	void Set(const CDes8& aDes);
+	CDes8 Des() const;
+	const TUidType&  UidType() const;
+
+private:
+	TUint Check() const;
+
+private:
+	TUidType iType;
+	TUint32 iCheck;
+	};
+
+class CStoreWriteStream;
+CStoreWriteStream& operator<<(CStoreWriteStream& aStream,const TCheckedUid& aUid);
+
+class CStoreReadStream;
+CStoreReadStream& operator>>(CStoreReadStream& aStream, TCheckedUid& aUid);
+}
+#endif // !defined(__CHECKEDUID_H__)