Re: xsl grouping problem

 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
 <xsl:output indent="yes"/>
<xsl:template match="*">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>

<xsl:template match="*[line]">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:for-each-group select="*" group-adjacent="exists(self::line|self::line_first|self::line_last)">
<xsl:choose>
<xsl:when test="current-grouping-key()">
<stanza>
<xsl:apply-templates select="current-group()"/>
</stanza>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="current-group()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:copy>
</xsl:template>

</xsl:stylesheet>




$ saxon8 stanza.xml  stanza.xsl
<?xml version="1.0" encoding="UTF-8"?>
<chapter>
   <para>This is a paragraph in the chapter</para>
   <stanza>
      <line_first>This is first line of a stanza of poetry</line_first>
      <line>This is line of poetry</line>
      <line>This is line of poetry</line>
      <line>This is line of poetry</line>
      <line_last>This is last line of a stanza of poetry</line_last>
   </stanza>
   <para>This is a paragraph in the chapter</para>
</chapter>

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