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diff --git a/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/children/EqualContentChildRule.java b/bundles/org.simantics.browsing.ui.model/src/org/simantics/browsing/ui/model/children/EqualContentChildRule.java
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index 000000000..aae8d0d3b
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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.children;
+
+import java.util.Collection;
+import java.util.Collections;
+
+import org.simantics.browsing.ui.model.tests.Test;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+
+/**
+ * A child rule that follows the given relation. Content type of both parent 
+ * and child node types must be Resources.
+ * @author Hannu Niemistö
+ */
+public class EqualContentChildRule implements ChildRule {
+    Test condition;
+    
+    public EqualContentChildRule(Test condition) {        
+    }
+    
+    @Override
+    public Collection<?> getChildren(ReadGraph graph, Object parent) throws DatabaseException {
+        if(condition != null && !condition.test(graph, parent))
+            return Collections.emptyList();
+        else
+            return Collections.singletonList(parent);
+    }
+    
+    @Override
+    public Collection<?> getParents(ReadGraph graph, Object child) throws DatabaseException {
+        if(condition != null && !condition.test(graph, child))
+            return Collections.emptyList();
+        else
+            return Collections.singletonList(child);
+    }
+
+    @Override
+    public boolean isCompatible(Class<?> contentType) {
+        if(condition == null)            
+            return true;
+        else
+            return condition.isCompatible(contentType);
+    }
+}