Problem with DOM API

Question

Hi,
I use org.w3c.dom to create an XML file.
I need to configure "xmlns" into father and child tags, because I have to send my XML to a soap webservice,
and the server arises "error in schema XML" if I put "xmlns" only in father, not in child.
The problem is that DOM API automatically removes the "xmlns" from child, and I didn't find a way to force it
to use "xmlns" at any time.
This is my XML before to generate the DOM tree:
<?xml version="1.0" encoding="UTF-8" standalone="no"?> 
  <nfeDadosMsg xmlns="http://www.portalfiscal.inf.br/nfe/wsdl/NfeRecepcao2"> 
    <enviNFe versao="2.00" xmlns="http://www.portalfiscal.inf.br/nfe"> 
      <idLote>75600</idLote> 
      <NFe xmlns="http://www.portalfiscal.inf.br/nfe"> 
        ... many internal tags ...
      </NFe> 
    </enviNFe> 
</nfeDadosMsg>After to generate the DOM tree, NFe becomes without "xmlns", only "<NFe>".
If I change to:
<NFe xmlns="http://www.portalfiscal.inf.br/nfeXXX">then the DOM tree becomes fine with "xmlns" into enviNFe and NFe, but
because the xmlns's are differents.

Answer 1

If you stop thinking of that as an "xmlns attribute" and start thinking of it as what it really is, namely a namespace declaration, then you might understand the part of the DOM documentation which refers to namespaces better. You might also track down the rule which describes what a "default" namespace is and how it's inherited (and overridden) by child elements. Without that these things are just going to be a mystery to you.
Also be sure to make your DOM be namespace-aware if you're going to use namespaces. By default it isn't. I believe it's the factory which has the setNamespaceAware method and not the parser.