My question is kinda long...thanks for helping my with my question


This question is in reference to the post at
http://sources.redhat.com/ml/xsl-list/2000-07/msg00059.html

Where it says ::

"how to retrieve the unique elements so that you can identify what part

numbers are used in your file:

  *[@partNum and generate-id(.)=generate-id(key('parts', @partNum))]

In the code below:

What is the difference between the following 2 lines (Line 1 vs Line 2)
(I know what these lines do, but i dont know HOW. Please find related
XML at the end of the file )----

Line 1

<xsl:apply-templates select="*[@partNum and
generate-id(.)=generate-id(key('parts', @partNum))]" />

Line 2

<xsl:apply-templates select="*[generate-id(.)=generate-id(key('parts',
@partNum))]" />


ALSO what does this line do

 -- generate-id(.)=generate-id(key('parts', @partNum)) ---

probably retrieves  a part number only once but I don't understand
how...

BUT how is the line  different from

-- generate-id(.)=generate-id(key('parts', @partNum)[1]) ---




=======================



The complete XSL is: ( in XSL below -- i should be using either Line 1
or Line 2 above }



<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

      <xsl:output method="text"/>



      <xsl:key name="parts" match="*[@partNum]" use="@partNum" />



      <xsl:template match="/PARTS">

           <xsl:apply-templates select="*[@partNum and
generate-id(.)=generate-id(key('parts', @partNum))]" />

           <xsl:apply-templates
select="*[generate-id(.)=generate-id(key('parts', @partNum))]" />

          <!-- <xsl:apply-templates select="*[key('parts', @partNum)]"
/>-->

      </xsl:template>



      <xsl:template match="*[@partNum]">

          <xsl:value-of select="@partNum" />

          <xsl:value-of select="count(key('parts', @partNum))" />


  <xsl:text>

 </xsl:text>



    </xsl:template>

</xsl:stylesheet>





<?xml version="1.0" encoding="UTF-8"?>

<PARTS>

<CPU partNum="1345" />

<CPU partNum="1345" />

<CPU partNum="1345" />

<CPU partNum="1345" />

<CPU partNum="11111345" />

<CPU partNum="111111111345" />

</PARTS>