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diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/imagedecorators/ImageDecorationRule.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/imagedecorators/ImageDecorationRule.java
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+/*******************************************************************************
+ * Copyright (c) 2010, 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.browsing.ui.model.imagedecorators;
+
+import org.simantics.browsing.ui.content.ImageDecorator;
+import org.simantics.browsing.ui.model.visuals.VisualsRule;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+
+/**
+ * Image decoration rule gives an image decorators to a node.
+ * @author Hannu Niemistö
+ * 
+ * @see org.simantics.utils.ui.gfx.DecorationOverlayIcon
+ * @see org.simantics.utils.ui.gfx.AlphaAdjustmentImageDescriptor
+ * @see org.simantics.utils.ui.gfx.HSVAdjustmentImageDescriptor
+ */
+public interface ImageDecorationRule extends VisualsRule {
+    ImageDecorator getImageDecorator(ReadGraph graph, Object content) throws DatabaseException;
+}