I think maybe I don't understand the desired input & output quite
correctly here. I would have thought something like
<xsl:if
test=" normalize-space( @page-num )
!=
normalize-space( preceding::*[(_at_)page-num][1]/@page-num )">
would do the trick. Is there something wrong with this approach that
I'm missing? Perhaps the grouping approach suggested is significantly
more efficient?
Each and every element is having page-num attribute. Suppose if
10 elements are there in the first page, all ten tags will have
page-num="1". the 11th element will have page-num="2". I want to
display page-num value in the browser where it is changing from
the previous value. In other words I have to display unique page
numbers when they occur first
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="1.0">
<!-- match root -->
<xsl:template match="/">
<xsl:apply-templates/>
</xsl:template>
<!-- anything that isn't otherwise matched below just gets copied -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<!-- match any element that has a page-num= attribute -->
<xsl:template match="*[(_at_)page-num]">
<!-- if it has a new page number ... -->
<xsl:if
test="normalize-space( @page-num ) != normalize-space(
preceding::*[(_at_)page-num][1]/@page-num )">
<!-- display it (the page number) as a big heading ... -->
<h1>Page: <xsl:value-of select="@page-num"/></h1>
</xsl:if>
<!-- and generate a copy of the element itself (including the page-num=) -->
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
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