xs:Date output not compliant with spec

Hello,

I have found some deviation from the XML spec. when I use XMLHelper.INSTANCE.save.
The problem occurs when I want to print Date (xs:Date).
It looks e.g.: 2008-07-11 UTC
Instead of: 2008-07-11Z.

Can anybody confirm if this is a bug?

I debugged the source code and found a pattern at line 453:
SDOSimpleDateFormat f = new SDOSimpleDateFormat("yyyy-MM-dd zz");
in the method:
public synchronized String toYearMonthDay(Date date)

I also found similar patterns in other methods too.

I have created a small demo for representing my problem.

The code:
--------------
public class DemoSdo {

public static void main(String[] args) throws IOException

{ HelperContext ctx = HelperProvider.getDefaultContext(); FileInputStream is = new FileInputStream("src/sdo/DemoSDO.xsd"); XSDHelper xsdHelper = ctx.getXSDHelper(); xsdHelper.define(is, null); DataFactory f = ctx.getDataFactory(); DataObject newDO = f.create("http://DemoSDO/src/sdo", "DemoSDO"); Date d = new Date(); newDO.setDate("timeStamp", d); newDO.setDate("demoDate", d); String uri = newDO.getType().getURI(); String name = newDO.getType().getName(); String serializedDO = XMLHelper.INSTANCE.save(newDO, uri, name); System.out.println(serializedDO); }

}

The XML schema:
--------------------------
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://DemoSDO/src/sdo">
<xsd:complexType name="DemoSDO">
<xsd:sequence>
<xsd:element name="timeStamp" type="xsd:dateTime">
</xsd:element>
<xsd:element name="demoDate" type="xsd:date">
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>

The output:
----------------
<?xml version="1.0" encoding="UTF-8"?>
<sdo:DemoSDO xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sdo="http://DemoSDO/src/sdo" xsi:type="sdo:DemoSDO">
<timeStamp>2008-08-28T10:10:40.366Z</timeStamp>
<demoDate>2008-08-28 UTC</demoDate>
</sdo:DemoSDO>

According to the specification demoDate should be 2008-08-28Z.