Re: [xsl] Generating book index via attributes...

Dave Carvell wrote:
> (Using XMLSpy Enterprise Edition version 2010 rel.  2, xsl 1.0)
>
> <?xml version="1.0" encoding="utf-8"?>
> <docroot>
>     <chapter>
>         <title>
>             Brakes
>             <indxref refs1="Brakes"/>
>         </title>
>          <subchapter>
>             <title>
>                 Drum type Brakes
>                 <indxref refs1="Brakes" refs2="drum"/>
>             </title>
>             <para>stuff...
>                 <indxref refs1="Brakes" refs2="drum" refs3="diagram"/>
>        </para>
>        ...
>
> I need to generate an index. For now, I just need a hierarchical listing.
Maybe the following does what you want but I am guessing as to what you 
want to achieve:
<xsl:stylesheet
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
  version="1.0">

  <xsl:output method="html" indent="yes"/>

  <xsl:key name="refs1Key"
           match="indxref/@refs1"
           use="."/>

  <xsl:key name="refs2Key"
           match="indxref/@refs2"
           use="concat(../@refs1, '|', .)"/>

  <xsl:key name="refs3Key"
           match="indxref/@refs3"
           use="concat(../@refs1, '|', ../@refs2, '|', .)"/>

  <xsl:template match="docroot">
    <xsl:apply-templates select="//indxref/@refs1[generate-id() = 
generate-id(key('refs1Key', .)[1])]" mode="group">
      <xsl:sort select="."/>
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="@refs1" mode="group">
    <xsl:value-of select="."/>
    <br/>
    <xsl:apply-templates select="key('refs1Key', 
.)/../@refs2[generate-id() = generate-id(key('refs2Key', 
concat(../@refs1, '|', .))[1])]" mode="group">
      <xsl:sort select="."/>
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="@refs2" mode="group">
    <br/>....<xsl:value-of select="." /><br/>
    <xsl:apply-templates select="key('refs2Key', concat(../@refs1, '|', 
.))/../@refs3[generate-id() = generate-id(key('refs3Key', 
concat(../@refs1, '|', ../@refs2, '|', .))[1])]" mode="group">
      <xsl:sort select="."/>
    </xsl:apply-templates>
  </xsl:template>

  <xsl:template match="@refs3" mode="group">
    <br/>........<xsl:value-of select="." /><br/>
  </xsl:template>

</xsl:stylesheet>

--

        Martin Honnen
        http://msmvps.com/blogs/martin_honnen/

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