DO NOT REPLY [Bug 3723] New: - Default namespace declaration repeated by XMLSerializer

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=3723

Default namespace declaration repeated by XMLSerializer

           Summary: Default namespace declaration repeated by XMLSerializer
           Product: Xerces-J
           Version: 1.4.3
          Platform: Sun
        OS/Version: Solaris
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Serialization
        AssignedTo: xerces-j-dev@xml.apache.org
        ReportedBy: etienne.pelletier@pegs.com


The XMLSerializer is repeating the default namespace declaration when 
descendents of an element are part of the same namespace.  For example:

<a xmlns="MyNS">
  <b xmlns="MyNS">
    <c xmlns="MyNS"/>
  </b>
</a>

is equivalent to 

<a xmlns="MyNS">
  <b>
    <c/>
  </b>
</a>

Therefore, an "xmlns" attribute containing the default namespace URI should not 
be printed out by the XMLSerializer if it is the same and previously defined by 
an ancester of this element.

The bug happens in startElement.  The default namespace could probably be added 
to the ElementState class to fix the problem.

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