Re: template match : node-set paring through multiple-

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"
>


<xsl:template match="/">

<xsl:for-each select="//b">
<xsl:variable name="dst" select="id(/root/c/c1[@role='src'][@target=current()/@id]/../c1[@role='dst']/@target)"/>
<xsl:choose>
<xsl:when test="$dst and count($dst/..|../..)=1">
matched <xsl:value-of select="@id"/> 
<xsl:text/> (uncle is <xsl:value-of select="$dst/@id"/>)<xsl:text/>
</xsl:when>
<xsl:otherwise>
not matched <xsl:value-of select="@id"/> 
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>


</xsl:template>


produces

$ saxon b.xml b.xsl
<?xml version="1.0" encoding="utf-8"?>
not matched _10
matched _11 (uncle is _10)
not matched _12

which is I think what you want.

David

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