XSL template question

 
<xsl:variable name="headerRows"> 
    <xsl:call-template name="maxLabelsHeader"> 
        <xsl:with-param name="referencePosition" select="$referencePosition"/> 
    </xsl:call-template> 
</xsl:variable> 

<xsl:template name="maxLabelsHeader"> 
   <xsl:param name="referencePosition"/> 
   <xsl:for-each select="//reference[position()=$referencePosition]/columns/column"> 
        <xsl:sort select="count(label_row)" order="descending" /> 
        <xsl:if test="position() = 1"> 
              <xsl:value-of select="count(label_row)" /> 
        </xsl:if> 
  </xsl:for-each> 
</xsl:template>