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Unique node and delimiter concatenation

Subject: Unique node and delimiter concatenation
From: "Senthilkumaravelan K" <skumaravelan@xxxxxxxxxxxxxx>
Date: Thu, 29 Mar 2007 14:20:29 -0700
 Unique node and delimiter concatenation
Hi ,
I getting struck with border condition in the below xslt when i am
trying to concatenate with "," "and " while finding unique node based
on the condition.
Can any one suggest me how I could over come this ?

My xml looks like
my XSLT the same
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" />
<xsl:key name="getUniqueData" match="PRODUCT_NUMBER" use="."/>
<xsl:template match="/">
<xsl:variable name="itemsOfthisProduct" select="//LINE_ITEM"/>
<xsl:for-each select="$itemsOfthisProduct/PRODUCT_NUMBER[generate-id()
= generate-id(key('getUniqueData',.))]">
<xsl:variable name="warn"
select="following-sibling::*[contains(name(), 'CUST_MSG')]"  />
<xsl:if test="$warn='Y'">
<xsl:value-of select="."/>
<xsl:if test="position() &lt; last()-1 and test=$warn='Y'">
<xsl:message>less than</xsl:message>
<xsl:text>, </xsl:text></xsl:if>
<xsl:if test="position()=last()-1 and test=$warn='Y'"><xsl:text>and
<xsl:if test="position()=last() and test=$warn='Y'"><xsl:text>.</xsl:text>

My expected out is
<products>1 and 2.
depends on the CUST_MSG value I need to concatenate "," and respective

Am facing some border condition it is failing to produce the desired output.
Please help.

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