diff -r 000000000000 -r f72a12da539e menufw/hierarchynavigator/hnengine/inc/hndatachangenotifier.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnengine/inc/hndatachangenotifier.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,46 @@
+/*
+* Copyright (c) 2007-2008 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:  
+*
+*/
+ 
+
+#ifndef C_HNDATACHANGENOTIFIER_H
+#define C_HNDATACHANGENOTIFIER_H
+
+#include "hndatachangeobserver.h"
+
+
+/**
+ * @ingroup group_hnengine
+ * Data change notifier interface.
+ *
+ * @lib hnengine
+ * @since S60 v5.0
+ */
+class MHnDataChangeNotifier
+    {    
+    public:
+    
+    /**
+     * Subscribes observer.
+     *
+     * @since S60 v5.0
+     * @param aObserv Observer to HNEngine.
+     */
+    virtual void SubscribeL( CHnDataChangeObserver* aObserv ) = 0;  
+    };
+
+
+#endif // C_HNDATACHANGENOTIFIER_H