Duplicated namespace declaration from output xml

Hi,
I have this problem when I use jaxb to create output xml. My output xml looks like this:

<data>
  <instanceData>
     <individual>
       <homeAddress>
          <LocalAddress xsi:type="ns3:CompoundLocalAddress" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns3="http://www.tmforum.org/NGOSS/SID/Business/7.0/Common">
            <positionNr xsi:type="xs:int" xmlns:xs="http://www.w3.org/2001/XMLSchema">1</positionNr>
            <fullAddress xsi:type="xs:string" xmlns:xs="http://www.w3.org/2001/XMLSchema">7783 SOUTH 73 RD STREET</fullAddress>
          </LocalAddress>
          <LocalAddress xsi:type="ns3:CompoundLocalAddress" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ns3="http://www.tmforum.org/NGOSS/SID/Business/7.0/Common">
            <positionNr xsi:type="xs:int" xmlns:xs="http://www.w3.org/2001/XMLSchema">2</positionNr>
            <fullAddress xsi:type="xs:string" xmlns:xs="http://www.w3.org/2001/XMLSchema"></fullAddress>
          </LocalAddress>          
       </homeAddress>
    </individual>
 </instanceData>
</data>

There are duplicate namespace declaration on the output. How can I set it to be delcared only one time?

Thanks,