Mukul,



Nice job with this.



At 01:05 PM 10/9/2003, you wrote:
I applied your suggestion to store an intermediate
tree fragment in a variable, and then converting the
variable into a nodeset. By iterating the nodeset, I
am able to generate numbers 1,2,3,4..

The XSL is --



<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xalan="http://xml.apache.org/xalan">
<xsl:output method="xml" version="1.0"
encoding="UTF-8" indent="yes"/>

<xsl:key name="x" match="/rss/channel/item"

use="category"/>

<xsl:template match="/">

  <xsl:variable name="treeFrag">

    <rootelem>

      <xsl:for-each select="rss/channel/item">

        <xsl:if test="generate-id(.) = generate-id(key('x',

category)[1])">

          <h1>                                              <xsl:value-of 
select="category"/>

          </h1>

          <xsl:for-each select="key('x', category)">

            <desc>

              <xsl:value-of select="description"/>

            </desc>

          </xsl:for-each>

        </xsl:if>

      </xsl:for-each>

    </rootelem>

  </xsl:variable>



  <xsl:for-each
select="xalan:nodeset($treeFrag)/rootelem/desc">
    <xsl:if test="name(preceding-sibling::*[1]) =
'h1'">
      <h1>
        <xsl:value-of select="preceding-sibling::*[1]" />
      </h1>
    </xsl:if>
    ITEM<xsl:value-of select="position()"/>
<xsl:value-of select="."/>
  </xsl:for-each>
</xsl:template>

</xsl:stylesheet>



In the above solution, though numbers are getting
generated properly, but to output <h1> tags at the
right place, I had to write a slightly complex syntax
* xsl:if test="name(preceding-sibling::*[1]) = 'h1'" *

Yes. This could be improved by using plain old templates to process this 
stuff, as in:



<xsl:template match="/">

  <xsl:variable name="treeFrag"> [construct as you have 
it...]  </xsl:variable>



  <xsl:apply-templates
    select="xalan:nodeset($treeFrag)/rootelem" mode="treefrag">
  </xsl:for-each>
</xsl:template>

<xsl:template match="item" mode="treefrag">

  ITEM<xsl:number level="any"/> <!-- I changed it to xsl:number: more 
dependable -->

  <xsl:value-of select="."/>

</xsl:template>



<xsl:template match="h1" mode="treefrag">
  <xsl:copy-of select="."/>
</xsl:template>

This can also be generalized further to handle a greater range of input 
structures.



I still think an XPath-based counting solution may be possible here, but 
it's highly dependent on the structure of the input (and hence, rather more 
brittle), and in the meantime I think I lost the input sample (it's around 
here somewhere).



Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
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