namespaces and extensions and multiple files

I want my XSL file to handle all the variants of the "multiple output
file" scenario; to avoid a load of namespace declarations at the
front, I thought I'd be clever and use the "xmlns" attribute on the
extension element itself, thusly:

 <xsl:when test="contains($processor,'Clark')">
  <document xmlns="http://www.jclark.com/xt" href="{$filename}">
   <xsl:call-template name="writestone"/>
  </document>
 </xsl:when>

 <xsl:when test="contains($processor,'SAXON')">
  <output xmlns="http://icl.com/saxon" file="{$filename}">
   <xsl:call-template name="writestone"/>
  </output>
 </xsl:when>

 <xsl:when test="contains($processor,'Apache')">
  <write xmlns="org.apache.xalan.xslt.extensions.Redirect" file="{$filename}">
   <xsl:call-template name="writestone"/>
  </write>
 </xsl:when>

 <xsl:when test="contains($processor,'Oracle')">
  <output use="oout"  xmlns="http://www.oracle.com/XSL/Transform/java" href="{$filename}">
   <xsl:call-template name="writestone"/>
  </output>

XT accepts this, and does what I expect. The other three don't. Would
anyone care to express a view on whether this *should* work?

Sebastian Rahtz


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