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diff --git a/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/DataNodeMap.java b/bundles/org.simantics.scenegraph.profile/src/org/simantics/scenegraph/profile/DataNodeMap.java
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+/*******************************************************************************
+ * Copyright (c) 2011 Association for Decentralized Information Management in
+ * Industry THTH ry.
+ * 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:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.scenegraph.profile;
+
+import org.simantics.scenegraph.INode;
+
+/**
+ * An interface for diagram profile styles for accessing scene graph nodes based
+ * on diagram data objects, which usually are database resources.
+ * 
+ * <p>
+ * See {@link DataNodeConstants} for some predefined constants for accessing
+ * certain scene graph nodes related to a diagram.
+ * 
+ * @author Antti Villberg
+ * @see Style
+ * @see INode
+ * @see DataNodeConstants
+ */
+public interface DataNodeMap {
+
+    INode getNode(Object data);
+
+}