--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/platform35/org.eclipse.core.resources/src/org/eclipse/core/internal/watson/IElementComparator.java	Thu Jul 30 11:56:23 2009 -0500
@@ -0,0 +1,25 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.core.internal.watson;
+
+import org.eclipse.core.internal.dtree.IComparator;
+
+/**
+ * This interface allows clients of the element tree to specify
+ * how element infos are compared, and thus how element tree deltas
+ * are created.
+ */
+public interface IElementComparator extends IComparator {
+	/**
+	 * The kinds of changes
+	 */
+	public int K_NO_CHANGE = 0;
+}