Thanks David for letting us know a nice solution.
I have added it on my site:
http://gandhimukul.tripod.com/xslt/extensions.html (item no. 2)
On 5/26/07, David Carlisle <davidc(_at_)nag(_dot_)co(_dot_)uk> wrote:
> I find this problem rather difficult to solve with pure XSLT 1.0. This
> is due to the fact, that XSLT doesn't allow to maintain variable
> state
It's easy to do it in xslt1 using two stylesheets or 1 stylesheet and
the xx:nde-set() extension: first do the grouping and then do a second
pass that adds the numbering (for which you can just use position() or
xsl:number/> once the complication of sorting has beenresolved.
It is presumably possible to do it in one xslt1 stylesheet without
extensions but I suspect you'd have to be quite inefficient repeatedly
calculating the sort order, and apart from mozilla pretty much all xslt1
engines have a node-set extension.
oh what the heck I suppose I'd better do an xslt1 version, with no extensions...
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:key name="g" match="group_id" use="." />
<xsl:output indent="yes"/>
<xsl:variable name="g"
select="/sample/result/details/group_id[generate-id()=generate-id(key('g',.))]"/>
<xsl:template match="sample">
<xsl:for-each select="$g">
<xsl:sort select="."/>
<xsl:variable name="p" select="position()-1"/>
<xsl:variable name="c" select="count(key('g',$g[.<current()]))"/>
<xsl:for-each select="key('g',.)">
<output row="{$c+$p+position()}"><xsl:value-of select="."/></output>
</xsl:for-each>
<xsl:if test="position()!=last()">
<output row="{$c+count(key('g',.))+$p+1}"/>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
saxon sg.xml sg.xsl
<?xml version="1.0" encoding="utf-8"?>
<output row="1">250</output>
<output row="2">250</output>
<output row="3"/>
<output row="4">300</output>
David
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Regards,
Mukul Gandhi
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