Please describe the problem:
Basically, any occurrence of a reference to an xsl:variable, via the    
"$variable" notation is out of scope within the count="pattern" predicate.   
This leads to undefined variable errors and or patterns which cannot be    
compiled.   
  
Some sample xslt code:  
<?xml version="1.0"?> 
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 
                version='1.0'> 
 
<xsl:strip-space elements="article chapter section "/> 
<xsl:output method="text"/> 
 
<xsl:template match="biblioref"> 
 
  <xsl:variable name="cite.target" select="@endterm" /> 
  <xsl:variable name="tagA" select="concat($cite.target, '-A')"/> 
  <xsl:variable name="tagX" select="concat($cite.target, '-X')"/> 
  <xsl:variable name="tagW" select="concat($cite.target, '-W')"/> 
 
    <xsl:text>target: </xsl:text> 
    <xsl:value-of select="$cite.target"/> 
 
  <xsl:variable name="cite.preceding"> 
<!-- 
    Try insert one of these count attributes in the following xsl:number 
element 
 
          None of these work because all $variables seem to be out of scope 
      count="biblioref[@endterm = concat($cite.target, '-A') or 
                       @endterm = concat($cite.target, '-X') or 
                       @endterm = concat($cite.target, '-W')]" /> 
      count="biblioref[@endterm = $tagA or @endterm = $tagX or @endterm = 
$tagW ]" level="any"/> 
      count="biblioref[@endterm = $tagA] |  biblioref[@endterm = $tagX] | 
biblioref[@endterm = $tagW ]" /> 
      count="biblioref[@endterm = $tagX]" /> 
 
             Without $variables these ones work perfectly. 
      count="biblioref[@endterm ='Bob01-X']" /> 
      count="biblioref[@endterm ='Bob01-X' or @endterm ='Bob01-A' or @endterm 
='Bob01-W' ]" /> 
  --> 
 
    <xsl:number  from="bibliography" level="any" 
      count="biblioref[@endterm = concat($cite.target, '-A') or 
                       @endterm = concat($cite.target, '-X') or 
                       @endterm = concat($cite.target, '-W')]" /> 
       
  </xsl:variable> 
 
  <xsl:text>         count : </xsl:text> 
  <xsl:value-of select="$cite.preceding"/> 
</xsl:template> 
 
</xsl:stylesheet> 
  

Steps to reproduce:
xsltproc test.xsl test.xml 
where test.xml is something like this: 
 
<?xml version="1.0"?> 
<!DOCTYPE article [ 
] 
> 
 
<article> <title>xsl:number count="pattern[$variable]" test</title> 
 <chapter> 
   <section>  
     <para> Basically we need some data to serve as a test for 
inserting an xsl:variable reference into a predicate condition applied 
to a pattern used as the attribute value for the "count" attribute 
of the xsl:number XSLT element. 
      <citation><biblioref endterm="Bob01-A"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
      <citation><biblioref endterm="Bob01-W"/></citation> 
     </para> 
   </section> 
   <section> 
     <para> 
      <citation><biblioref endterm="Norm02-W"/></citation> 
      <citation><biblioref endterm="Bob01-A"/></citation> 
      <citation><biblioref endterm="Bob01-W"/></citation> 
     </para> 
   </section> 
   <section> 
     <para> 
      <citation><biblioref endterm="Norm02-X"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
      <citation><biblioref endterm="Norm02-X"/></citation> 
      <citation><biblioref endterm="Norm02-X"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
     </para> 
   </section> 
   <bibliography><title>Bibliography</title></bibliography> 
 </chapter> 
 <chapter> 
   <section> 
     <para> This is just to test the "from" attribute to see 
that xsl:number-ing really does restart after the previous  
bibliography element. 
      <citation><biblioref endterm="Norm02-W"/></citation> 
      <citation><biblioref endterm="Mike05-W"/></citation> 
      <citation><biblioref endterm="Mike05-A"/></citation> 
     </para> 
   </section> 
   <section> 
     <para> 
      <citation><biblioref endterm="Bob01-A"/></citation> 
      <citation><biblioref endterm="Bob01-X"/></citation> 
      <citation><biblioref endterm="Bob01-W"/></citation> 
     </para> 
   </section> 
   <section> 
     <para> 
      <citation><biblioref endterm="Norm02-X"/></citation> 
      <citation><biblioref endterm="Norm02-A"/></citation> 
      <citation><biblioref endterm="Norm02-A"/></citation> 
      <citation><biblioref endterm="Norm02-A"/></citation> 
      <citation><biblioref endterm="Mike05-W"/></citation> 
     </para> 
   </section> 
   <bibliography><title>Bibliography</title></bibliography> 
 </chapter> 
</article> 
 

Actual results:
$> xsltproc test.xsl test.xml 
XPath error : Undefined variable 

Expected results:


Does this happen every time?
yes 

Other information: