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Re: [xsl] Displaying Unique attribute value

2008-10-03 09:20:23
2008/10/3 Ganesh Babu N <nbabuganesh(_at_)gmail(_dot_)com>:
Dear All,

I am having a tricky XML which i have to view in IE using XSL. (As IE
does not support XSLT 2.0), the solution should be in XSLT 1.0

My XML is like below:

<chapter id="i120" page-num="1" extra-info="CHAPTER 1">
       <title id="i121" page-num="1">Introduction to Corporate Finance</title>
       <chbeginning id="i122" page-num="1" extra-info="Chapter Opener">
               <title id="i123" page-num="1">OPENING CASE</title>
               <para id="i124" page-num="1" dropcap="yes">Apple began as a
two-man....million.</para>
               <para id="i125" page-num="1">Despite...altogether.</para>
               <para id="i126" page-num="1">Of course... Steven Jobs!</para>
               <para id="i127" page-num="1">With ... 74 days.</para>
       </chbeginning>
       <chbody id="i128" page-num="1" extra-info="Chapter Body">
               <section id="i129" page-num="1">
                       <title id="i130" page-num="1">1.1 WHAT IS CORPORATE 
FINANCE?</title>
                       <sectbody id="i131" page-num="1">
                               <para id="i132" page-num="1">Suppose... 
firm.</para>
                               <subsection id="i133" page-num="2">
                                       <title id="i134" page-num="2">The 
Balanc.. Firm</title>
                                       <para id="i135" page-num="2">Suppose 
... finance.</para>


In the above XML, page-num attribute is there for all the elements. My
requirement is that to display the value of the page-num attribute
only first time. Means i should display the page-num at where the
value is changing. We don't know on which node the value will change
it may be child, it may be sibling.


Use a key:

<xsl:key names="page-nums" match="*" use="@page-num"/>

with

<xsl:if test="generate-id() = generate-id(key('page-nums', @page-num)[1])">

to test if that element has the first first occurrence of its page-num attribute


-- 
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/

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