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diff --git a/org.simantics.interop.diagram/src/org/simantics/interop/diagram/DiagramUtils.java b/org.simantics.interop.diagram/src/org/simantics/interop/diagram/DiagramUtils.java
new file mode 100644
index 0000000..29f3e21
--- /dev/null
+++ b/org.simantics.interop.diagram/src/org/simantics/interop/diagram/DiagramUtils.java
@@ -0,0 +1,90 @@
+package org.simantics.interop.diagram;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.common.utils.OrderedSetUtils;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.layer0.Layer0;
+import org.simantics.simulation.ontology.SimulationResource;
+
+/**
+ * 
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
+ *
+ */
+public class DiagramUtils {
+
+	
+	public static void addElement(WriteGraph g, Diagram diagram, Resource element) throws DatabaseException {
+		Layer0 l0 = Layer0.getInstance(g);
+		OrderedSetUtils.add(g, diagram.getDiagram(), element);
+		generateName(g, diagram, element);
+		g.claim(diagram.getDiagram(), l0.ConsistsOf, element);
+	}
+	
+	public static void addElementFirst(WriteGraph g, Diagram diagram, Resource element) throws DatabaseException {
+		Layer0 l0 = Layer0.getInstance(g);
+		OrderedSetUtils.addFirst(g, diagram.getDiagram(), element);
+		generateName(g, diagram, element);
+		g.claim(diagram.getDiagram(), l0.ConsistsOf, element);
+	}
+	
+	public static void generateName(WriteGraph g, Diagram diagram, Resource element) throws DatabaseException {
+		Layer0 l0 = Layer0.getInstance(g);
+		if (g.getPossibleRelatedValue(element, l0.HasName) != null)
+			return;
+		Resource type = g.getSingleType(element);
+		
+		String name = NameUtils.findFreshEscapedName(g, (String)g.getRelatedValue(type, l0.HasName), diagram.getDiagram(),l0.ConsistsOf);
+		g.claimLiteral(element, l0.HasName, name);
+	}
+	
+	
+	public static Resource createRelation(WriteGraph w, Layer0 b, Resource superrelation) throws DatabaseException {
+        Resource relation = w.newResource();
+        Resource invRelation = w.newResource();
+        w.claim(relation, b.InverseOf, invRelation);
+        w.claim(relation, b.ConsistsOf, invRelation);
+        w.claimLiteral(invRelation, b.HasName, "Inverse");
+        
+        w.claim(relation, b.SubrelationOf, b.SuperrelationOf, superrelation);
+        w.claim(invRelation, b.SubrelationOf, b.SuperrelationOf, w.getInverse(superrelation));
+        
+        //w.claim(relation, b.InstanceOf, ab.ReferenceProvider);
+        return relation;
+    }
+	
+	public static Resource createRelation(WriteGraph w, Layer0 b, Resource... superrelation) throws DatabaseException {
+        Resource relation = w.newResource();
+        Resource invRelation = w.newResource();
+        w.claim(relation, b.InverseOf, invRelation);
+        w.claim(relation, b.ConsistsOf, invRelation);
+        w.claimLiteral(invRelation, b.HasName, "Inverse");
+        for (Resource rel : superrelation) {
+        	w.claim(relation, b.SubrelationOf, null, rel);
+        	Resource inv = w.getPossibleInverse(rel);
+        	if (inv != null)
+        		w.claim(invRelation, b.SubrelationOf, null, inv);
+        } 
+        return relation;
+    }
+	
+	public static Resource getModel(ReadGraph graph, Resource res) throws DatabaseException{
+		Layer0 l0 = Layer0.getInstance(graph);
+		SimulationResource sim = SimulationResource.getInstance(graph);
+		Resource r = res;
+		while (r != null) {
+			if (graph.isInstanceOf(r, sim.Model))
+				return r;
+			r = graph.getPossibleObject(r, l0.PartOf);
+		}
+		return r;
+	}
+	
+	public static Resource getConfiguration(ReadGraph graph, Resource model) throws DatabaseException {
+		SimulationResource sim = SimulationResource.getInstance(graph);
+		return graph.getSingleObject(model, sim.HasConfiguration);
+	}
+}