template is not caught though declared correct - xslt

Question

I've the below XML.
<?xml version="1.0" encoding="UTF-8"?>
<chapter>
<toc>
<toc-part>
<toc-div>
<toc-item>
<toc-title>2.1 Introduction</toc-title>
<toc-pg>179</toc-pg>
</toc-item>
</toc-div>
</toc-part>
</toc>
<section level="sect1">
<title><content-style font-style="bold">2.1 INTRODUCTION</content-style></title>
<section level="sect2">
<title><content-style font-style="bold">The bank</content-style></title>
<para num="2.1.1">
</para>
</section>
</section>
</chapter>
and below XSLT.
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:fn="http://www.w3.org/2005/xpath-functions"
xmlns:ntw="Number2Word.uri"
exclude-result-prefixes="ntw">
<xsl:output method="html"/>
<xsl:strip-space elements="*"/>
<xsl:variable name="ThisDocument" select="document('')"/>
<xsl:template name="toc-item" match="chapter/toc/toc-part/toc-div/toc-item">
<xsl:variable name="tocpg">
<xsl:value-of select="concat('P',current()/toc-pg/text())"/>
</xsl:variable>
<xsl:variable name="tocpgtag" select="translate($tocpg,'.', '-')"/>
<xsl:variable name="chapternumber">
<!-- Get num attribute of parent node -->
<xsl:value-of select="ancestor::chapter[1]/#num"/>
</xsl:variable>
<xsl:variable name="strl">
<xsl:value-of select="string-length(substring-after(#num,'.'))"/>
</xsl:variable>
<xsl:variable name="Brac">
<xsl:choose>
<xsl:when test="contains(substring-after(#num,'.'),'.')">
<xsl:value-of select="3"/>
</xsl:when>
<xsl:when test="contains(#num,'(')">
<xsl:value-of select="2"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="1"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="NewL">
<xsl:value-of select="string-length(substring-before(current()/toc-pg,'.'))"/>
</xsl:variable>
<xsl:variable name="newNum">
<xsl:choose>
<xsl:when test="$NewL=1">
<xsl:value-of select="concat('0',substring-before(current()/toc-pg/text(),'.'))"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="substring-before(current()/toc-pg/text(),'.')"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="d">
<xsl:value-of select="concat('toc-item-',$ThisDocument//ntw:nums[#num=$Brac]/#word,'-level')"/>
</xsl:variable>
<xsl:variable name="new">
<xsl:value-of select="concat('er:#LRSC_CH_',$newNum,'/',$tocpgtag)"/>
</xsl:variable>
<table class="{$d}">
<tbody>
<tr>
<td class="toc-item-num">
<xsl:value-of select="current()/#num"/>
</td>
<td class="toc-title">
<xsl:value-of select="current()/toc-title"/>
</td>
<td class="toc-pg">
<xsl:variable name="refe">
<xsl:choose>
<xsl:when test="//section/title/content-style[upper-case(./text())=upper-case(current()/toc-title/text())]/section[1]/para[1]/#num[1]">
<xsl:value-of select="//section/title/content-style[upper-case(./text())=upper-case(current()/toc-title/text())]/section[1]/para[1]/#num[1]"/>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="//section/title/content-style[upper-case(text())=upper-case(current()/toc-title/text())]/para[1]/#num[1]"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="full">
<xsl:value-of select="$refe"/>
</xsl:variable>
<xsl:variable name="pre">
<xsl:value-of select="substring-before($refe,'.')"/>
</xsl:variable>
<xsl:variable name="post">
<xsl:value-of select="substring-after($refe,'.')"/></xsl:variable>
<xsl:variable name="siz">
<xsl:choose>
<xsl:when test="$pre>'1'">
<xsl:value-of select="concat('LRSC_CH_',$pre,'/P',translate($full,'.','-'))"></xsl:value-of>
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="concat('LRSC_CH_0',$pre,'/P',translate($full,'.','-'))"></xsl:value-of>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<a href="{$siz}">
<xsl:value-of select="./toc-pg"/>
</a>
</td>
</tr>
</tbody>
</table>
<xsl:if test="./toc-subitem">
<xsl:for-each select="./toc-subitem">
<xsl:apply-templates select="."/>
</xsl:for-each>
</xsl:if>
<!--</table>-->
</xsl:template>
<ntw:nums num="1" word="first"/>
<ntw:nums num="2" word="second"/>
<ntw:nums num="3" word="third"/>
<ntw:nums num="4" word="forth"/>
<ntw:nums num="5" word="fifth"/>
<ntw:nums num="6" word="sixth"/>
<ntw:nums num="7" word="seventh"/>
<ntw:nums num="8" word="eighth"/>
<ntw:nums num="9" word="nighth"/>
<ntw:nums num="10" word="tenth"/>
</xsl:style-sheet>
here i've declared <xsl:when test="//section/title/content-style[upper-case(./text())=upper-case(current()/toc-title/text())]/section[1]/para[1]/#num[1]"> to get the following page num of section tag, but here it is not getting caught properly, when i make it
<xsl:when test="//section[upper-case(title/content-style/text())=upper-case(current()/toc-title/text())]/section[1]/para[1]/#num[1]">
it is throwing me an error as below.
XPTY0004: The supplied sequence ('3' item(s)) has the wrong occurrence to match the sequence type xs:string ('zero or one')
please let me know where am i going wrong and how to catch the sequence.
Thanks

Answer 1

This is your current expression...
<xsl:when test="//section/title/content-style[upper-case(./text())
= upper-case(current()/toc-title/text())]/section[1]/para[1]/#num[1]">
If you remove the conditional check on the toc-title it becomes this
<xsl:when test="//section/title/content-style/section[1]/para[1]/#num[1]">
This should (hopefully) highlight your problem as it is looking for a section element under the content-style object. Looking at your XML, this is not the case.
As your section element is under another section element, you possible need to nest your conditions here. Try this instead
<xsl:when test="//section[title/content-style[upper-case(text())
= upper-case(current()/toc-title/text())]]/section[1]/para[1]/#num">
There is maybe a case for using a variable here, to improve readability:
<xsl:variable name="toc-title" select="upper-case(current()/toc-title/text())" />
<xsl:choose>
<xsl:when test="//section[title/content-style[upper-case(text()) = $toc-title]]/section[1]/para[1]/#num">
Having said that, I couldn't recreate the error when I used your alternate expression.