Re: [xsl] Grouping and Numbering

["Mukul Gandhi" <gandhi.mukul@xxxxxxxxx>]

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@xxxxxxxxx> 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[.&lt;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