diff -r 000000000000 -r fb279309251b project/com.nokia.carbide.cpp.epoc.engine/src/com/nokia/carbide/internal/cpp/epoc/engine/model/StructuredItemListConverter.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project/com.nokia.carbide.cpp.epoc.engine/src/com/nokia/carbide/internal/cpp/epoc/engine/model/StructuredItemListConverter.java	Fri Apr 03 23:33:03 2009 +0100
@@ -0,0 +1,47 @@
+/*
+* 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 the License "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: 
+*
+*/
+
+package com.nokia.carbide.internal.cpp.epoc.engine.model;
+
+import com.nokia.carbide.internal.api.cpp.epoc.engine.dom.IASTStatement;
+
+/**
+ * This converter extends {@link ModelConverter} by providing additional support
+ * for structured model items.  In these, one aspect of the model counts as a key;
+ * this is used with {@link #elementMatches(ModelType, ModelType)} to determine whether
+ * two model elements match closely enough to allow changes to the same DOM node.
+ * If so, {@link #updateNode(ElementType, ElementType)} will be used to update that
+ * node.  
+ *
+ * @param <ElementType>
+ * @param <ModelType>
+ */
+public interface StructuredItemListConverter<ElementType extends IASTStatement, ModelType>
+	extends ModelConverter<ElementType, ModelType> {
+
+	/**
+	 * Tell if the given model element matches another. This is different
+	 * from equality checking, and is different because block statements are
+	 * identified by key rather than by full content.
+	 */
+	boolean elementMatches(ModelType element, ModelType another);
+	
+	/** Update an existing node from a newly generated element. */
+	void updateNode(ElementType existing, ElementType newElement);
+	
+
+}