Re: [xsl] Grouping problem. 2.0

grr your test document had two L2.1 sections which caused me some grief
trying to work out why it numbered the second one 2.2;-)

If I understand what you want, something like this:


 <xsl:template match="book" name="book">
  <xsl:param name="n" select="1"/>
  <xsl:param name="prefix" select="''"/>
  <xsl:param name="nodes" select="*"/>
  <xsl:param name="offset" select="0"/>
  <xsl:for-each-group select="$nodes" 
group-starting-with="title[(_at_)role=$n]">
   <xsl:choose>
    <xsl:when test="empty($nodes)">
    </xsl:when>
    <xsl:when test="self::title[(_at_)role=$n]">
     <block role="{(_at_)role}" number="{$prefix}{position()-$offset}">
      <xsl:call-template name="book">
       <xsl:with-param name="n" select="$n+1"/>
       <xsl:with-param name="nodes" select="current-group()"/>
       <xsl:with-param name="prefix" 
select="concat($prefix,position()-$offset,'.')"/>
       <xsl:with-param name="offset" select="1"/>
      </xsl:call-template>
     </block>
    </xsl:when>
    <xsl:otherwise>
     <xsl:copy-of select="current-group()"/>
    </xsl:otherwise>
   </xsl:choose>
  </xsl:for-each-group>
 </xsl:template>
 
</xsl:stylesheet>



$ saxon9 dpbook.xml dpbook.xsl
<?xml version="1.0" encoding="UTF-8"?>
<block role="1" number="1">
   <title role="1">L1</title>
   <block role="2" number="1.1">
      <title role="2">L1.1</title>
      <para>This document defines an XML schema for  ....</para>
   </block>
   <block role="2" number="1.2">
      <title role="2">L1.2</title>
      <para>The normative XML Schema for the OpenDoc ....</para>
   </block>
</block>
<block role="1" number="2">
   <title role="1">L2</title>
   <para>This chapter introduces the structure of ....</para>
   <para>In the OpenDocument format, each structu ....</para>
   <block role="2" number="2.1">
      <title role="2">L2.1</title>
      <para>A document root element is the primary e ....</para>
      <block role="3" number="2.1.1">
         <title role="3">L2.1.1</title>
         <para>The content models of the five root elem ....</para>
         <block role="4" number="2.1.1.1">
            <title role="4">L4 test</title>
            <para>The content models of the five root elem ....</para>
            <para>The &lt;office:document&gt; root contains a co ....</para>
         </block>
         <block role="4" number="2.1.1.2">
            <title role="4">L4 test 2.1.1.2</title>
            <para>The content models of the five root elem ....</para>
            <para>The &lt;office:document&gt; root contains a co ....</para>
         </block>
      </block>
   </block>
   <block role="2" number="2.2">
      <title role="2">L2.1</title>
      <para>A document root element is the primary e ....</para>
   </block>
</block>

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