Re: for-each-group - only get elements in each group

     <xsl:template match="Cases">
         <xsl:for-each-group select="Story" group-by="Category">
             <category><xsl:copy-of
select="current-grouping-key()"/></category>
             <xsl:apply-templates select="Case"/>
         </xsl:for-each-group>
     </xsl:template>