RE: How can i transform output stream again.

By using the node-set you can re-process your "intermediate" output which
is XML thru XSLT processing again to get your final output.

This is what I do

<xsl:template match="/">
  <xsl:variable name="temp">
    <xsl:apply-templates/>
  </xsl:variable>
  <xsl:apply-templates select = "xt:node-set($temp)" mode="pass2"/>
</xsl:template>

The inner apply-templates produces the intermediate tags.  The final
apply-templates  processes those tags.  Mode helps determine which phase
I'm in.  A 2 pass transformation in 1 execution of the processor.

Cheers!
Larry



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