Re: Unique headers

From: Dan Diebolt <dandiebolt@xxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
CC: kanthi_damodaran@xxxxxxxxxxx
Subject: Re:  Unique headers
Date: Wed, 4 Apr 2001 21:21:20 -0700 (PDT)

Your desired output appears to treat General movies special in
that they are not categorized or indented:

> Chocolat
> Billy
> Mystery
>   Ellen Brokovich
>   Pelican Brief
> Horror
>   Nightmare on Elm Street
>   Blair Witch Project
> The Emperor's Groove
> Toy Story

I ignored this and additionally changed your MoviesList tag to
MovieList (double plural). This is a grouping problem solved
by the so called "Muenchian Method" (named after Steve Muench
who proposed it). You can serach the archives for a full
explanation of the technique. The output is simple text
with <br/> elements; you can html-ify it to your liking:

   General
   -Chocolat
   -Billy
   -The Emperor's Groove
   -Toy Story
   Mystery
   -Ellen Brokovich
   -Pelican Brief
   Horror
   -Nightmare on Elm Street
   -Blair Witch Project

Regards,

Dan
************
File: MovieList.xml
<?xml-stylesheet type="text/xsl" href="MovieList.xsl"?>
<MovieList>
 <Movie>
  <Type>General</Type>
  <Title>Chocolat</Title>
 </Movie>
 <Movie>
  <Type>General</Type>
  <Title>Billy</Title>
 </Movie>
 <Movie>
  <Type>Mystery</Type>
  <Title>Ellen Brokovich</Title>
 </Movie>
 <Movie>
  <Type>Mystery</Type>
  <Title>Pelican Brief</Title>
 </Movie>
 <Movie>
  <Type>Horror</Type>
  <Title>Nightmare on Elm Street</Title>
 </Movie>
 <Movie>
  <Type>Horror</Type>
  <Title>Blair Witch Project</Title>
 </Movie>
 <Movie>
  <Type>General</Type>
  <Title>The Emperor's Groove</Title>
 </Movie>
 <Movie>
  <Type>General</Type>
  <Title>Toy Story</Title>
 </Movie>
</MovieList>

File: MovieList.xsl
<?xml version="1.0"?>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:key name="MovieCategories" match="MovieList/Movie" use="Type"/>

 <xsl:template match="/">
  <xsl:for-each select="MovieList/Movie[Type and
generate-id(.)=generate-id(key('MovieCategories',Type))]">
   <xsl:variable name="group" select="Type"/>
   <xsl:value-of select="$group"/><br/>
   <xsl:for-each select="/MovieList/Movie[Type=$group]">
    -<xsl:value-of select="Title"/><br/>
   </xsl:for-each>
  </xsl:for-each>
 </xsl:template>
</xsl:stylesheet>

> Chocolat
> Billy
> Mystery
>   Ellen Brokovich
>   Pelican Brief
> Horror
>   Nightmare on Elm Street
>   Blair Witch Project
> The Emperor's Groove
> Toy Story

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