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diff --git a/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/migration/OntologiesFromLibrary.java b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/migration/OntologiesFromLibrary.java
new file mode 100644
index 000000000..a742b1e48
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+++ b/bundles/org.simantics.db.layer0/src/org/simantics/db/layer0/migration/OntologiesFromLibrary.java
@@ -0,0 +1,45 @@
+/*******************************************************************************
+ * Copyright (c) 2012 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.db.layer0.migration;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.common.request.ObjectsWithType;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.request.Read;
+import org.simantics.layer0.Layer0;
+
+public class OntologiesFromLibrary implements Read<List<Resource>> {
+    
+    Resource library;
+    
+    public OntologiesFromLibrary(Resource library) {
+        this.library = library;
+    }
+
+    @Override
+    public List<Resource> perform(ReadGraph graph) throws DatabaseException {
+        Layer0 L0 = Layer0.getInstance(graph);
+        ArrayList<Resource> result = new ArrayList<Resource>();
+        for(Resource r : graph.syncRequest(new ObjectsWithType(library, L0.ConsistsOf, L0.Library))) {
+            if(graph.isInstanceOf(r, L0.Ontology))
+                result.add(r);
+            else
+                result.addAll(graph.syncRequest(new OntologiesFromLibrary(r)));
+        }
+        return result;
+    }
+
+}