diff -r 14dc2103a631 -r ed1c9f64298a trace/tracebuilder/com.nokia.tracebuilder/src/com/nokia/tracebuilder/model/TraceModelPersistentExtension.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/tracebuilder/com.nokia.tracebuilder/src/com/nokia/tracebuilder/model/TraceModelPersistentExtension.java	Wed Jun 23 14:35:40 2010 +0300
@@ -0,0 +1,56 @@
+/*
+* Copyright (c) 2007 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:
+*
+* Interface implemented by trace model extensions that need to store themselves 
+* into persistent storage along with other model elements
+*
+*/
+package com.nokia.tracebuilder.model;
+
+/**
+ * Interface implemented by trace model extensions that need to store themselves
+ * into persistent storage along with other model elements. The storage format
+ * is left to the implementation. When loading, the trace provider calls
+ * TraceObjectFactory.createExtension with the storage name. The object factory
+ * returns an instance of this interface and the provider calls setData to
+ * initialize this.
+ * 
+ */
+public interface TraceModelPersistentExtension extends TraceModelExtension {
+
+	/**
+	 * Gets the name used when storing this extension
+	 * 
+	 * @return the storage name
+	 */
+	public String getStorageName();
+
+	/**
+	 * Gets the data of this extension
+	 * 
+	 * @return the extension data
+	 */
+	public String getData();
+
+	/**
+	 * Sets the data of this extension
+	 * 
+	 * @param data
+	 *            the data
+	 * @return true if extension should be added to model, false if not
+	 */
+	public boolean setData(String data);
+
+}