[xsl] Java Extension Optimization

Hello,
  I have several java extensions that I use to pass data to other processes 
from my transforms. I've been using xml:message's to write unnecessary values 
to my log file to prevent Saxon from discarding my variables, since it doesn't 
see them used/referenced in my transform.

  Here's an example:

            <xsl:variable name="keepGraphic" 
select="xisComDocRsrcs:addImage($commonDocResources,'arrow_summary_path.gif')"/>
            <xsl:if test="$keepGraphic=true()">
              <xsl:message>xislog~debug::keepGraphic arrow_summary_path.gif 
<xsl:value-of select="$keepGraphic"/></xsl:message>
            </xsl:if>

  In this case I am letting the extension know that I want a particular graphic 
included with the deliverable that I am creating. This extension prevents 
unused graphics from finding their way into EPUB deliverables where they cause 
problems.

  Is there a better way to prevent Saxon from discarding my extension that 
doesn't require me to write something to an output stream?

Thanks,
   Craig


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