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diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/UnsignedLongBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/UnsignedLongBinding.java
new file mode 100644
index 000000000..b6fad4f98
--- /dev/null
+++ b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/UnsignedLongBinding.java
@@ -0,0 +1,139 @@
+package org.simantics.databoard.binding.impl;
+
+import org.simantics.databoard.binding.LongBinding;
+import org.simantics.databoard.binding.error.BindingException;
+import org.simantics.databoard.primitives.UnsignedLong;
+import org.simantics.databoard.type.LongType;
+
+/**
+ * Binding of {@link UnsignedLong} to long type.
+ * This is bitwise binding, i.e. high values are negative.
+ * 
+ * @author Toni Kalajainen <toni.kalajainen@iki.fi>
+ */
+public abstract class UnsignedLongBinding extends LongBinding {
+
+	UnsignedLongBinding(LongType type) {
+		super(type);
+	}
+	
+	public static class Immutable extends UnsignedLongBinding {
+
+		public Immutable(LongType type) {
+			super(type);
+		}
+
+		@Override
+		public Object create(Number value) throws BindingException {
+			return UnsignedLong.fromBits(value.longValue());
+		}
+
+		@Override
+		public Object create(String value) throws BindingException {
+			try {
+				return new UnsignedLong.Immutable(value);
+			} catch (java.lang.IllegalArgumentException e) {
+				throw new BindingException( e );
+			}
+		}
+
+		@Override
+		public Object create(long value) throws BindingException {
+			return UnsignedLong.fromBits(value);
+		}
+
+		@Override
+		public Object create(Long value) throws BindingException {
+			return UnsignedLong.fromBits(value);
+		}
+
+		@Override
+		public void setValue(Object obj, long value) throws BindingException {
+			throw new BindingException("UnsignedLong is immutable class");
+		}
+
+		@Override
+		public void setValue(Object obj, Number value) throws BindingException {
+			throw new BindingException("UnsignedLong is immutable class");
+		}
+		
+		@Override
+		public boolean isImmutable() {
+			return true;
+		}
+		
+		@Override
+		public boolean isInstance(Object obj) {
+			return obj instanceof UnsignedLong.Immutable;
+		}
+		
+	}
+
+	public static class Mutable extends UnsignedLongBinding {
+
+		public Mutable(LongType type) {
+			super(type);
+		}
+
+		@Override
+		public Object create(Number value) throws BindingException {
+			return UnsignedLong.Mutable.fromBits(value.longValue());
+		}
+
+		@Override
+		public Object create(String value) throws BindingException {
+			return new UnsignedLong.Mutable(value);
+		}
+
+		@Override
+		public void setValue(Object obj, Number value) throws BindingException {
+			UnsignedLong.Mutable v = (UnsignedLong.Mutable) obj;
+			v.setValue(value.longValue());
+		}
+		
+		@Override
+		public boolean isImmutable() {
+			return false;
+		}
+
+		@Override
+		public Object create(long value) throws BindingException {
+			return UnsignedLong.Mutable.fromBits(value);
+		}
+
+		@Override
+		public Object create(Long value) throws BindingException {
+			return UnsignedLong.Mutable.fromBits(value);
+		}
+
+		@Override
+		public void setValue(Object obj, long value) throws BindingException {
+			UnsignedLong.Mutable v = (UnsignedLong.Mutable) obj;
+			v.setValue(value);
+		}
+
+		@Override
+		public boolean isInstance(Object obj) {
+			return obj instanceof UnsignedLong.Mutable;
+		}
+		
+	}	
+	
+	@Override
+	public String toString(Object value) throws BindingException {
+		return value.toString();
+	}
+
+	@Override
+	public Long getValue(Object o) throws BindingException {
+		UnsignedLong v = (UnsignedLong) o;
+		return v.toBits();
+	}
+
+	@Override
+	public long getValue_(Object o) throws BindingException {
+		UnsignedLong v = (UnsignedLong) o;
+		return v.toBits();
+	}
+
+}