With the Dec. XSL spec I was using macros, whose functionality now seems
to be replaced by named templates and parameters. 

I thus wanted to try and understand how to use them by translating
something which worked w/o problems with the previous draft.

I have a little file texmplatest.xml, which contains:

<invitation>
<to>Anna, Bernard, Didier, Johanna</to>
</invitation>

I want this to turn into a list with an identifier, etc. using the
following XSL file (I might not generate completely correct new-draft
XSL formatting objects, but never mind).

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/XSL/Transform/1.0"
                xmlns:fo="http://www.w3.org/XSL/Format/1.0"
                result-ns="fo"
                default-space="">

<xsl:template match='/'>
 <fo:page-sequence>
   <xsl:apply-templates/>
 </fo:page-sequence>
</xsl:template>

<xsl:template match="invitation">
<fo:list-block>
  <fo:list-item id="listto">
    <fo:list-item-label font-style="italic">
      <xsl:text>To:</xsl:text>
    </fo:list-item-label>
    <fo:list-item-body>
      <xsl:value-of select="to"/>
    </fo:list-item-body>
  </fo:list-item>
</fo:list-block>
</xsl:template>

</xsl:stylesheet>

which gives as output with xt what I want:

<fo:page-sequence
xmlns:fo="http://www.w3.org/XSL/Format/1.0">
<fo:list-block>
<fo:list-item id="listto">
<fo:list-item-label font-style="italic">To:</fo:list-item-label>
<fo:list-item-body>Anna, Bernard, Didier, Johanna</fo:list-item-body>
</fo:list-item>
</fo:list-block>
</fo:page-sequence>

However, now consider the following XSL file, where I try to achieve
the same result with a named template and parameters:

<xsl:template name="listitem">
  <xsl:param-variable name="labeltext">labeltext</xsl:param-variable>
  <xsl:param-variable name="itemid">itemid</xsl:param-variable>
  <xsl:param-variable name="itemtext">itemtext</xsl:param-variable>
  <fo:list-item id="{$itemid}">
    <fo:list-item-label font-style="italic">
      $labeltext<xsl:text>:</xsl:text>
    </fo:list-item-label>
    <fo:list-item-body>
      <xsl:value-of select="$itemtext"/>
    </fo:list-item-body>
  </fo:list-item>
</xsl:template>

<xsl:template match='/'>
 <fo:page-sequence>
   <xsl:apply-templates/>
 </fo:page-sequence>
</xsl:template>

<xsl:template match="invitation">
<fo:list-block>
  <xsl:call-template name="listitem">
    <xsl:param name="labeltext">To</xsl:param>
    <xsl:param name="itemid">listto</xsl:param>
    <xsl:param name="itemtext">to</xsl:param>
  </xsl:call-template>
</fo:list-block>
</xsl:template>

</xsl:stylesheet>

When I run this with xt, then I get the following:

<fo:page-sequence
xmlns:fo="http://www.w3.org/XSL/Format/1.0">
<fo:list-block>
<fo:list-item id="listto">
<fo:list-item-label font-style="italic">
$labeltext:</fo:list-item-label>
<fo:list-item-body>to</fo:list-item-body>
</fo:list-item>
</fo:list-block>
</fo:page-sequence>

So the $labeltext parameter was not substituted (putting {} around 
it does not work) and the XSL instruction
<xsl:value-of select="$itemtext"/> using the parameter $itemtext 
was not "executed", although from somewhere the value "to"
seems to have appeared. What am I missing? How are parameters substituted
inside named templates?

Thanks for your help. Michel Goossens


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