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diff --git a/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/NameMap.java b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/NameMap.java
new file mode 100644
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+++ b/bundles/org.simantics.layer0.utils/src/org/simantics/layer0/utils/NameMap.java
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+/*******************************************************************************
+ * 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;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.simantics.db.Resource;
+
+/**
+ * Service that creates unique names for resources and
+ * resource paths. 
+ */
+public class NameMap {
+
+    int maxLength;
+    Map<Resource, String> cache = new HashMap<Resource, String>();
+    int curId = 0;
+    
+    public NameMap(int maxLength) {
+        this.maxLength = maxLength;
+    }
+    
+    protected boolean isValid(String name) {
+        return true;
+    }
+    
+    private static final int charA = 65;
+    private static final int char0 = 48 - 26;
+    
+    public void clear() {
+    	curId = 0;
+    	cache.clear();
+    }
+    
+    public String getName(Resource resource) {
+        String ret = cache.get(resource);
+        while(ret == null) {
+            int id = curId++;
+            byte[] c = new byte[5];
+            c[0] = '@';
+            for(int i=0;i<4;++i) {
+                int lid = id%36;
+                if(lid < 26)
+                    c[4-i] = (byte)(charA + lid);
+                else
+                    c[4-i] = (byte)(char0 + lid);
+                id /= 36;
+            }                
+            ret = new String(c);
+            if(isValid(ret))
+                cache.put(resource, ret);
+            else
+                ret = null;
+        }
+        return ret;
+    }
+    
+    public static void main(String[] args) {
+		NameMap m = new NameMap(24);
+		for(int i=0;i<100;++i)
+			System.out.println(m.getName(new Resource() {
+
+				@Override
+				public int getThreadHash() {
+					return hashCode();
+				}
+				
+				@Override
+				public long getResourceId() {
+					return 3;
+				}
+
+				@Override
+				public Resource get() {
+					return this;
+				}
+
+				@Override
+				public boolean isPersistent() {
+					return false;
+				}
+				
+				@Override
+				public int compareTo(Resource o) {
+					// TODO Auto-generated method stub
+					return 0;
+				}
+
+				@Override
+				public boolean equalsResource(Resource other) {
+					return equals(other);
+				}
+				
+			}));
+			
+	}
+    
+    public String getName(Resource[] resources) {
+        String ret = "";
+        for(Resource r : resources)
+            ret += getName(r);
+        return ret;
+    }
+    
+}