The problem is here:
<xsl:template match="indexentry">
<xsl:variable name="term" select="@term"/>
<xsl:for-each-group select="//indexentry[(_at_)term=$term]"
group-by="@term">
This means that every time you encounter an indexentry, you are processing
all the indexentry's in the document that have the same term. You are then
grouping these by term, which does nothing useful, because you already
ensured that they all have the same term.
One question about the structure of your data: is it possible to encounter
<indexentry term="dog">
<indexentry term="leg">
</indexentry>
<indexentry term="table">
<indexentry term="leg">
</indexentry>
and if so, are the two references to "leg" to be combined, or not? This
doesn't arise in your sample, so I can't tell.
Michael Kay
http://www.saxonica.com/
-----Original Message-----
From: JBryant(_at_)s-s-t(_dot_)com [mailto:JBryant(_at_)s-s-t(_dot_)com]
Sent: 05 April 2005 19:34
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Recursion and for-each-group (XSLT 2.0)
Hi, all,
Apologies in advance for a long message. I'm trying to give a
complete
description of the problem.
I have defined a set of index entries as nested indexentry
elements in my
source file. Then, in the XSL, I am trying to use a single
template to
group the entries at each level. That much is working, but I
am getting
multiple results. I've tried a number of solutions, but I'm stumped.
Here's the source file:
<book>
<chapter title="Chapter1">
<indexentries>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111"/>
</indexentry>
</indexentry>
</indexentry>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word112">
<indexentry term="word1121"/>
</indexentry>
</indexentry>
</indexentry>
<indexentry term="word1">
<indexentry term="word12"/>
</indexentry>
<indexentry term="word2"/>
</indexentries>
</chapter>
<chapter title="Chapter2">
<indexentries>
<indexentry term="word3">
<indexentry term="word31">
<indexentry term="word311">
<indexentry term="word3111"/>
</indexentry>
</indexentry>
</indexentry>
<indexentry term="word3">
<indexentry term="word32"/>
</indexentry>
<indexentry term="word4"/>
</indexentries>
<topic title="Topic21">
<indexentries>
<indexentry term="word5">
<indexentry term="word51">
<indexentry term="word511">
<indexentry term="word5111"/>
</indexentry>
</indexentry>
</indexentry>
<indexentry term="word5">
<indexentry term="word52"/>
</indexentry>
<indexentry term="word6"/>
</indexentries>
</topic>
</chapter>
</book>
Here's my current best shot at a transform:
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:template match="/">
<xsl:variable name="indexentries">
<indexentries>
<xsl:for-each select="//indexentries/indexentry">
<indexentry term="{(_at_)term}"
target="{generate-id(ancestor::*[indexentries][1])}">
<xsl:copy-of select="indexentry"/>
</indexentry>
</xsl:for-each>
</indexentries>
</xsl:variable>
<xsl:for-each select="$indexentries">
<xsl:apply-templates/>
</xsl:for-each>
</xsl:template>
<xsl:template match="indexentry">
<xsl:variable name="term" select="@term"/>
<xsl:for-each-group select="//indexentry[(_at_)term=$term]"
group-by="@term">
<indexentry term="{(_at_)term}">
<xsl:choose>
<xsl:when test="indexentry">
<xsl:apply-templates select="current-group()/indexentry"/>
</xsl:when>
<xsl:otherwise>
<xsl:attribute name="target"
select="ancestor-or-self::*[(_at_)target]/@target"/>
</xsl:otherwise>
</xsl:choose>
</indexentry>
</xsl:for-each-group>
</xsl:template>
</xsl:stylesheet>
Here's the output from applying that stylesheet to the source file:
<?xml version="1.0" encoding="UTF-8"?>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word12" target="d1e3"/>
</indexentry>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word12" target="d1e3"/>
</indexentry>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word12" target="d1e3"/>
</indexentry>
<indexentry term="word2" target="d1e3"/>
<indexentry term="word3">
<indexentry term="word31">
<indexentry term="word311">
<indexentry term="word3111" target="d1e38"/>
</indexentry>
</indexentry>
<indexentry term="word32" target="d1e38"/>
</indexentry>
<indexentry term="word3">
<indexentry term="word31">
<indexentry term="word311">
<indexentry term="word3111" target="d1e38"/>
</indexentry>
</indexentry>
<indexentry term="word32" target="d1e38"/>
</indexentry>
<indexentry term="word4" target="d1e38"/>
<indexentry term="word5">
<indexentry term="word51">
<indexentry term="word511">
<indexentry term="word5111" target="d1e61"/>
</indexentry>
</indexentry>
<indexentry term="word52" target="d1e61"/>
</indexentry>
<indexentry term="word5">
<indexentry term="word51">
<indexentry term="word511">
<indexentry term="word5111" target="d1e61"/>
</indexentry>
</indexentry>
<indexentry term="word52" target="d1e61"/>
</indexentry>
<indexentry term="word6" target="d1e61"/>
And here's what I am aiming for:
<?xml version="1.0" encoding="UTF-8"?>
<indexentry term="word1">
<indexentry term="word11">
<indexentry term="word111">
<indexentry term="word1111" target="d1e3"/>
</indexentry>
<indexentry term="word112">
<indexentry term="word1121" target="d1e3"/>
</indexentry>
</indexentry>
<indexentry term="word12" target="d1e3"/>
</indexentry>
<indexentry term="word2" target="d1e3"/>
<indexentry term="word3">
<indexentry term="word31">
<indexentry term="word311">
<indexentry term="word3111" target="d1e38"/>
</indexentry>
</indexentry>
<indexentry term="word32" target="d1e38"/>
</indexentry>
<indexentry term="word4" target="d1e38"/>
<indexentry term="word5">
<indexentry term="word51">
<indexentry term="word511">
<indexentry term="word5111" target="d1e61"/>
</indexentry>
</indexentry>
<indexentry term="word52" target="d1e61"/>
</indexentry>
<indexentry term="word6" target="d1e61"/>
As you can see, multiple nodes are appearing in the output
tree. I'm using
Saxon 8.3, but I very much doubt the processor is the issue.
Thanks much.
Jay Bryant
Bryant Communication Services
(presently consulting at Synergistic Solution Technologies)
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