<xsl:template match="section[@type='subsection']"> 
 <xsl:variable name="x"
 select="count(following-sibling::section[@type='subsection'])"/> 
 <xsl:apply-templates select=following-sibling::section[
       count(following-sibling::section[@type='subsection'])=$x
          ]"/> 
</xsl:template> 

David

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