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diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java
new file mode 100644
index 000000000..2312a0690
--- /dev/null
+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/instantiation/Instance.java
@@ -0,0 +1,104 @@
+/*******************************************************************************
+ * 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.instantiation;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.WriteGraph;
+import org.simantics.db.common.utils.Literals;
+import org.simantics.db.common.utils.NameUtils;
+import org.simantics.db.exception.DatabaseException;
+
+
+public class Instance {
+    
+    public static class RelatedInstance {
+        Resource relation;
+        Instance instance;
+        int      cardinality;
+    }
+
+    public Resource              equals           = null;
+    public List<RelatedInstance> relatedInstances = new ArrayList<RelatedInstance>();
+    public Object                value            = null;
+
+    public Instance() {
+    }
+    
+    public Instance(Resource equals) {
+        this.equals = equals;
+    }
+    
+    public Resource instantiate(WriteGraph graph) throws DatabaseException {
+        if(equals != null)
+            return equals;
+        Resource ret = graph.newResource();        
+        for(RelatedInstance instance : relatedInstances)
+            for(int i=0;i<instance.cardinality;++i) 
+                graph.claim(ret, instance.relation, 
+                        instance.instance.instantiate(graph));
+        if(value != null)
+            graph.claimValue(ret, value);
+        return ret;
+    }
+    
+    public Resource instantiateUsing(WriteGraph graph, Resource resource) throws DatabaseException {
+        if(equals != null)
+            return equals;
+        Resource ret = resource;        
+        for(RelatedInstance instance : relatedInstances)
+            for(int i=0;i<instance.cardinality;++i) 
+                graph.claim(ret, instance.relation, 
+                        instance.instance.instantiate(graph));     
+        if(value != null)
+            graph.claimValue(ret, value);
+        return ret;
+    }   
+    
+    public void print(StringBuilder builder, int indentation, ReadGraph graph) throws DatabaseException {
+        ++ indentation;
+        if(equals != null) {
+            builder.append(NameUtils.getSafeName(graph, equals));
+        }
+        else {
+            if(value != null) {
+                builder.append(Literals.literalToString(value));
+                builder.append(" : ");
+            }
+            else 
+                builder.append("* : ");        
+//            boolean first = true;            
+    
+            for(RelatedInstance instance : relatedInstances) {
+                builder.append("\n");
+                for(int i=0;i<indentation;++i)
+                    builder.append("    ");
+                builder.append(NameUtils.getSafeName(graph, instance.relation));
+                if(instance.cardinality != 1)
+                    builder.append("[" + instance.cardinality + "]");
+                builder.append(" = ");
+                instance.instance.print(builder, indentation, graph);
+            }
+
+        }
+    }
+    
+    public String toString(ReadGraph graph) throws DatabaseException {
+        StringBuilder builder = new StringBuilder();
+        print(builder, 0, graph);
+        return builder.toString();
+    }
+    
+}