supportedDatatypes.put(TimeAttribute.identifier, new TimeAttributeProxy());
supportedDatatypes.put(DateTimeAttribute.identifier, new DateTimeAttributeProxy());
supportedDatatypes.put(DayTimeDurationAttribute.identifier,
new DayTimeDurationAttributeProxy());
supportedDatatypes.put(YearMonthDurationAttribute.identifier,
new YearMonthDurationAttributeProxy());
supportedDatatypes.put(DoubleAttribute.identifier, new DoubleAttributeProxy());
supportedDatatypes.put(IntegerAttribute.identifier, new IntegerAttributeProxy());
supportedDatatypes.put(AnyURIAttribute.identifier, new AnyURIAttributeProxy());
supportedDatatypes.put(HexBinaryAttribute.identifier, new HexBinaryAttributeProxy());
supportedDatatypes.put(Base64BinaryAttribute.identifier, new Base64BinaryAttributeProxy());