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diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/util/DefaultValue.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/util/DefaultValue.java
new file mode 100644
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+/*******************************************************************************
+ *  Copyright (c) 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.databoard.binding.util;
+
+import java.util.Map;
+import java.util.WeakHashMap;
+
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.binding.ArrayBinding;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.databoard.binding.Binding.Visitor;
+import org.simantics.databoard.binding.BooleanBinding;
+import org.simantics.databoard.binding.ByteBinding;
+import org.simantics.databoard.binding.DoubleBinding;
+import org.simantics.databoard.binding.FloatBinding;
+import org.simantics.databoard.binding.IntegerBinding;
+import org.simantics.databoard.binding.LongBinding;
+import org.simantics.databoard.binding.MapBinding;
+import org.simantics.databoard.binding.OptionalBinding;
+import org.simantics.databoard.binding.RecordBinding;
+import org.simantics.databoard.binding.StringBinding;
+import org.simantics.databoard.binding.UnionBinding;
+import org.simantics.databoard.binding.VariantBinding;
+import org.simantics.databoard.binding.error.BindingException;
+import org.simantics.databoard.binding.error.RuntimeBindingException;
+import org.simantics.databoard.type.ArrayType;
+import org.simantics.databoard.type.ByteType;
+import org.simantics.databoard.type.DoubleType;
+import org.simantics.databoard.type.FloatType;
+import org.simantics.databoard.type.IntegerType;
+import org.simantics.databoard.type.LongType;
+import org.simantics.databoard.type.StringType;
+import org.simantics.databoard.util.Range;
+
+/**
+ * Visitor that creates a default instance of a DataType.
+ * This visitor may throw RuntimeBindingException. 
+ * 
+ * Type                     Value
+ * ------------------------------------------------------
+ * Boolean                  false
+ * Byte, Integer, Long      0 or min limit
+ * Float, Double            0.0 or min limit
+ * String                   ""
+ * Optional                 *novalue*
+ * Union                    tag 0
+ * Record                   each field with default value
+ * Array                    min range number of elements
+ * Map                      no entries
+ * Variant                  {} : void
+ * 
+ * 
+ * TODO Create String according to the pattern
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public class DefaultValue implements Visitor<Object> {
+
+	/** Map of default values already created. Used to link back to recursive records */
+	Map<Binding, Object> map = new WeakHashMap<Binding, Object>(1); 
+	
+	@Override
+	public Object visit(ArrayBinding b) {
+		Object result = null;
+		
+		ArrayType at = b.type();
+		Range r = at.getLength();
+		int min = (r!=null) ? r.getLower().getValue().intValue() : 0;
+			
+		if (min>0) {
+			Binding componentBinding = b.getComponentBinding();
+			Object[] array = new Object[min];
+			for (int i=0; i<min; i++) {
+				array[i] = componentBinding.accept(this);
+			}
+			result = b.createUnchecked(array);
+		} else {
+			result = b.createUnchecked();
+		}		
+		return result;
+	}
+
+	@Override
+	public Object visit(BooleanBinding b) {
+		Object result = b.createUnchecked(Boolean.FALSE);
+		return result;
+	}
+
+	@Override
+	public Object visit(DoubleBinding b) {
+		DoubleType type = b.type();
+		Range range = type.getRange();
+		Number lowValue = range==null ? null : range.getLower().getValue();
+		return b.createUnchecked( lowValue == null ? 0 : lowValue.doubleValue() );
+	}
+
+	@Override
+	public Object visit(FloatBinding b) {
+		FloatType type = b.type();
+		Range range = type.getRange();
+		Number lowValue = range==null ? null : range.getLower().getValue();
+		return b.createUnchecked( lowValue == null ? 0 : lowValue.floatValue() );
+	}
+
+	@Override
+	public Object visit(IntegerBinding b) {
+		IntegerType type = b.type();
+		Range range = type.getRange();
+		Number lowValue = range==null ? null : range.getLower().getValue();
+		return b.createUnchecked( lowValue == null ? 0 : lowValue.intValue() );
+	}
+
+	@Override
+	public Object visit(ByteBinding b) {
+		ByteType type = b.type();
+		Range range = type.getRange();
+		Number lowValue = range==null ? null : range.getLower().getValue();
+		return b.createUnchecked( lowValue == null ? 0 : lowValue.intValue() );
+	}
+
+	@Override
+	public Object visit(LongBinding b) {
+		LongType type = b.type();
+		Range range = type.getRange();
+		Number lowValue = range==null ? null : range.getLower().getValue();
+		return b.createUnchecked( lowValue == null ? 0 : lowValue.longValue() );
+	}
+
+	@Override
+	public Object visit(OptionalBinding b) {
+		return b.createNoValueUnchecked();
+	}
+
+	@Override
+	public Object visit(RecordBinding b) {
+		try {
+			Object result = null;
+			if (b.type().isReferable()) {
+				result = map.get(b);
+				if (result!=null) return result;
+			}
+			Object[] values = new Object[ b.getComponentCount() ];
+			result = b.createPartial();
+			if (b.type().isReferable()) map.put(b, result);
+			for (int i=0; i<values.length; i++) {
+				Binding cb = b.getComponentBinding(i);			
+				values[i] = cb.accept(this);
+			}
+			b.setComponents(result, values);
+			return result;
+		} catch (BindingException e) {
+			throw new RuntimeBindingException(e);
+		}
+	}
+
+	@Override
+	public Object visit(StringBinding b) {
+		Object result = null;
+		StringType st = b.type();
+		if (st.getPattern() != null) {
+			// TODO Create a string that is valid to the pattern
+			result = b.createUnchecked("");			
+		} else {
+			result = b.createUnchecked("");
+		}
+		return result;
+	}
+
+	@Override
+	public Object visit(UnionBinding b) {
+		int tag = 0;
+		Binding componentBinding = b.getComponentBinding(tag);
+		Object tag0defaultValue = componentBinding.accept(this);
+		return b.createUnchecked(tag, tag0defaultValue);
+	}
+
+	
+	@Override
+	public Object visit(VariantBinding b) {
+		Binding voidBinding = Bindings.getBindingUnchecked(void.class);
+		Object voidValue = null;
+		return b.createUnchecked(voidBinding, voidValue);
+	}
+
+	@Override
+	public Object visit(MapBinding b) {
+		return b.createUnchecked();
+	}
+    
+}
+