At 2003-09-10 14:45 +0200, Kloeck, Erwin wrote:
your solution works. This was what I needed. Now I have to read a little
about what xls:key does to also understand this. :-)
Actually, when doing subgrouping on a tree you don't *always* have to use keys.
When I teach grouping in XSLT 1.0 I go through three different methods: by
axes, by variables and by keys. I find that multi-level grouping or
subgrouping can be a lot easier by variables when you don't need to act on
node sets.
But I also go over keys as a standalone concept, not just in grouping ... a
week from Monday we have a public European delivery of our courses that you
might be interested in where we go over every element, attribute and
function of both XSLT and XPath, and in a separate course that week, every
formatting object of XSL-FO.
I hope the example below helps.
.................... Ken
T:\ftemp>type erwin.xml
<?xml version="1.0" encoding="iso-8859-1"?>
<top>
<page>
<entry text='aaa'/>
<entry text='bbb'/>
<entry text='aaa'/>
</page>
<page>
<entry text='ccc'/>
<entry text='bbb'/>
<entry text='ccc'/>
</page>
</top>
T:\ftemp>type erwin.xsl
<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:output method="text"/>
<xsl:template match="top">
<xsl:for-each select="page">
Page <xsl:value-of select="position()"/>:
<xsl:variable name="entries" select="entry"/>
<xsl:for-each select="$entries">
<xsl:if
test="generate-id(.)=generate-id($entries[(_at_)text=current()/@text])">
Entry: <xsl:value-of select="@text"/>
</xsl:if>
</xsl:for-each>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
T:\ftemp>saxon erwin.xml erwin.xsl
Page 1:
Entry: aaa
Entry: bbb
Page 2:
Entry: ccc
Entry: bbb
T:\ftemp>
--
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