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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Sorting things on two levels
 Looks like grouping and sorting to me. Do you use XSLT 1.0 or 2.0? With XSLT 2.0 here is an approach: <xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs"> <xsl:output method="html" indent="yes"/> <xsl:template match="root"> <ul> <xsl:for-each-group select="indexterm" group-by="primary"> <xsl:sort select="current-grouping-key()"/> <li> <xsl:value-of select="current-grouping-key(), if (not(current-group()/secondary)) then current-group()/@id else ()" separator=", "/> <xsl:if test="current-group()/secondary"> <ul> <xsl:for-each-group select="current-group()" group-by="secondary"> <xsl:sort select="current-grouping-key()"/> <li> <xsl:value-of select="current-grouping-key(), current-group()/@id" separator=", "/> </li> </xsl:for-each-group> </ul> </xsl:if> </li> </xsl:for-each-group> </ul> </xsl:template> </xsl:stylesheet> Outputs <ul>
<li>aardvarks, {ID}</li>
<li>bears
<ul>
<li>breeding, {ID}</li>
<li>feeding, {ID}</li>
<li>hunting, {ID}, {ID}</li>
</ul>
</li>
</ul>for your sample data. 
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