Re: Re: [xsl] sequence numbering.

["william locksman" <vsd18 at rediffmail dot com>]

Hi Jenni
Your reply  was really a great learning .
about the name space,
The Declartion i am using is

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
xmlns:xalan="http://xml.apache.org/xslt";     
xmlns:redirect="org.apache.xalan.xslt.extensions.Redirect"extension-element-prefixes="redirect" 
             version="1.0">

and i am using XALAN processor

On Wed, 27 Mar 2002 Jeni Tennison wrote :
>Hi William,
>
> > Hi the solution Michael Suggested seems to fit my purpose, But 
>Since
> > i am a newbie to XSL , I do not know how to form a temporary 
>tree
> > that contains sorted sequence.
>
>You can create a temporary tree by creating it within an 
>xsl:variable:
>
>   <xsl:variable name="temporary-tree">
>     <xsl:for-each select="product">
>       <xsl:sort select="color" />
>       <xsl:copy-of select="." />
>     </xsl:for-each>
>   </xsl:variable>
>
>This assigns to the $temporary-tree variable a result tree 
>fragment
>that contains a number of product elements, copies of the ones in 
>your
>original document, sorted in order of their color.
>
>You can then convert the temporary tree into a node set using a
>node-set extension function, for example exsl:node-set():
>
>   exsl:node-set($temporary-tree)
>
>Which extension function you use depends on what your processor
>supports. Most processors support a node-set() extension function 
>of
>some form or another; check your processor's documentation to 
>find out
>what namespace you need to declare for it. If you have problems 
>with
>this, let us know, telling us which processor you're using.
>
>When you've converted the result tree fragment (the temporary 
>tree) to
>a node set, you can operate over it in exactly the same way as 
>you
>normally do, and number them with judicious use of the count 
>attribute
>as Mike suggested:
>
>   <xsl:for-each 
>select="exsl:node-set($temporary-tree)/product">
>     <xsl:variable name="this_color" select="color" />
>     <xsl:number count="product[color = $this_color]" />
>     ...
>   </xsl:for-each>
>
>What you're actually doing here is grouping the products 
>together
>based on their colour and then numbering them based on their 
>position
>within that group. If you find that the process described above 
>goes
>too slowly, you could use a grouping method instead. To give you 
>an
>idea of the process, the XSLT 2.0 grouping method would be:
>
>   <xsl:for-each-group select="product" group-by="color">
>     <xsl:sort select="color" />
>     <xsl:for-each select="current-group()">
>       <xsl:number value="position()" />
>       ...
>     </xsl:for-each>
>   </xsl:for-each-group>
>
>If you decide that you want to use this method, then have a read 
>of
>http://www.jenitennison.com/xslt/grouping/muenchian.html for a
>description of how to do the grouping in XSLT 1.0.
>
>Cheers,
>
>Jeni
>
>---
>Jeni Tennison
>http://www.jenitennison.com/
>
>
>  XSL-List info and archive:  
>http://www.mulberrytech.com/xsl/xsl-list
>


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