move all namespace definitions from subelements to the root only

[Jan Suchý]

Hello xerces-c users,
I would like to ask you for an advice.

I have this case, what I need to solve:

After the XQuery transformation a obtained XML in such format:

<ns0139:getCreditCardsResponse 
xmlns:ns0139="http://mw/services/CardService/v01";>
   <ns0139:limits>
       <ns0033:amount 
xmlns:ns0033="http://mw/CDM/v01/Products/Cards";>40000</ns0033:amount>
       <ns0033:cycle 
xmlns:ns0033="http://mw/CDM/v01/Products/Cards";>1</ns0033:cycle>
   </ns0139:limits>
</ns0139:getCreditCardsResponse>


The XML can have more and more elements and more and more namespaces.
The problem is that I would like to output the XML after XQuery transformation 
with namespaces defined in the root tag only, not on remaining elements.
So the desired output should be:

<ns0139:getCreditCardsResponse xmlns:ns0139="http://mw/services/CardService/v01"; 
xmlns:ns0033="http://mw/CDM/v01/Products/Cards";>
   <ns0139:limits>
       <ns0033:amount>40000</ns0033:amount>
       <ns0033:cycle>1</ns0033:cycle>
   </ns0139:limits>
</ns0139:getCreditCardsResponse>

Can somebody please post some idea how to do it in an elegant way ?

For example which API classes / methods should I use for this ?
Thank you,
Jan