I want to pipeline 2 templates opendoc2xhtml.xsl (from OpenOffice) and
xhtml2epub.xsl (my own) into a single opendoc2epub, that is, to pass
the result of the first one into the second one.
As I understand, the common technique is to get the first result into
a variable, and then run the second transformation on it (assuming
XSLT 2).

But I have a problem with including the stylesheets. If i try to
xsl:include both templates and define a template for the root node, I
get a conflict, because opendoc2xhtml also has one. And I don't want
to add modes or anything to it because it comes from an external
source, but I still need to override it somehow to put the result into
a variable in the first place.
Is it where xsl:import is used? I tried importing opendoc2xhtml.xsl as
well and calling xsl:apply-imports from the root template, but then
only root children were processed.

<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:x="http://www.w3.org/1999/xhtml"
  version="2.0">

  <xsl:import href="opendoc2xhtml.xsl"/>
  <xsl:include href="xhtml2epub.xsl"/>

  <xsl:template match="document-node(element(opendocrootname))">
    <xsl:variable name="temp">
      <xsl:apply-imports/>
    </xsl:variable>
    <xsl:apply-templates select="$temp"/>
  </xsl:template>

  <xsl:template match="document-node(element(x:html))">
    <xsl:next-match/>
  </xsl:template>

	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/