[xsl] Portability function-available tips

["Andrew Welch" <AWelch@xxxxxxxxxxxxxxx>]

Hopefully someone can help me out here, otherwise Ive got a lot of
coding to do...

Throughout a stylesheet I have node-sets created in the form:

  <xsl:variable name="foo-rtf">
  ..
  </xsl:variable>
  <xsl:variable name="foo" select="exsl:node-set($foo-rtf)"/>

Then I reference the node-sets using:

  <xsl:for-each select="$foo">
    do whatever
  </xsl:for-each>


Now I have to ensure the stylesheets work with Msxml 4.0 as well, which
doesn't support exsl out of the box.  The only way I can see of doing
this is to replace each occurance of:

  <xsl:for-each select="$foo">

With a choose/when using function available, with the body of the
for-each in a named template:

  <xsl:choose>
    <xsl:when test="function-available(msxml:node-set)">
      <xsl:for-each select="msxml:node-set($foo)">
        <xsl:call-template name="$foo-template"/>
      </xsl:for-each> 
    </xsl:when>
    <xsl:otherwise>
      <xsl:for-each select="exsl:node-set($foo)">
        <xsl:call-template name="$foo-template"/>
      </xsl:for-each>
    </xsl:otherwise>
  </xsl:choose>

This is bloating the code out, making it more difficult to read, and
just feels wrong.

Has anyone got any tips/tricks in this situation?

Is it possible to do the test in a single place, along the lines of:

<xsl:variable name="foo-node-set">
  <xsl:choose>
    <xsl:when test="function-available(msxml:node-set)">
    
      <xsl:copy-of select="msxml:node-set($foo-rtf)"/>

    </xsl:when>
    <xsl:otherwise>

      <xsl:copy-of select="exsl:node-set($foo-rtf)"/>

    </xsl:otherwise>
  </xsl:choose>
</xsl:variable>

...but of coure this still leaves you with a RTF.

cheers
andrew

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