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diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java
new file mode 100644
index 000000000..0addae767
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/predicates/SuperRelation.java
@@ -0,0 +1,101 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 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.layer0.utils.predicates;
+
+import java.util.Collection;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+
+public class SuperRelation extends UnaryPredicate {
+
+	Resource superrelation;
+
+	public SuperRelation(Resource superrelation) {
+		this.superrelation = superrelation;
+	}
+
+	@Override
+	public Collection<Resource> getResources(ReadGraph g) {
+		throw new UnsupportedOperationException();
+	}
+
+	@Override
+	public boolean has(ReadGraph g, Resource resource) throws DatabaseException {
+		return g.isSubrelationOf(resource, superrelation);
+	}
+
+	@Override
+	public boolean supportsUnboundedQuery() {
+		return false;
+	}
+
+	@Override
+	public void add(WriteGraph g, Resource r) throws DatabaseException {
+		if(!g.isSubrelationOf(r, superrelation)) {
+	    	Layer0 b = Layer0.getInstance(g);
+			g.claim(r, b.SubrelationOf, superrelation);
+			if(!g.hasStatement(r, b.InverseOf)) {
+				Resource invR = g.newResource();
+				g.claim(r, b.InverseOf, invR);
+				g.claim(invR, b.SubrelationOf, g.getInverse(superrelation));
+			}
+		}
+	}
+
+	@Override
+	public void remove(WriteGraph g, Resource r) throws DatabaseException {
+		// FIXME not implemented correctly
+    	Layer0 b = Layer0.getInstance(g);
+		if(g.isSubrelationOf(r, superrelation))
+			g.denyStatement(r, b.SubrelationOf, superrelation);
+	}
+
+	@Override
+	public boolean supportsAddition() {
+		return true;
+	}
+
+	@Override
+	public boolean supportsRemoval() {
+		return false;
+	}
+
+	@Override
+	public int hashCode() {
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + ((superrelation == null) ? 0 : superrelation.hashCode());
+		return result;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (getClass() != obj.getClass())
+			return false;
+		SuperRelation other = (SuperRelation) obj;
+		if (superrelation == null) {
+			if (other.superrelation != null)
+				return false;
+		} else if (!superrelation.equals(other.superrelation))
+			return false;
+		return true;
+	}
+	
+}