XML Tutorial/XSLT stylesheet/last

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if test="not(position()=last())"

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<cars>
  <manufacturer name="Chevrolet">
    <car>Cavalier</car>
    <car>Corvette</car>
    <car>Impala</car>
    <car>Malibu</car>
  </manufacturer>
  <manufacturer name="Ford">
    <car>Pinto</car>
    <car>Mustang</car>
    <car>Taurus</car>
  </manufacturer>
  <manufacturer name="Volkswagen">
    <car>Beetle</car>
    <car>Jetta</car>
    <car>Passat</car>
    <car>Touraeg</car>
  </manufacturer>
</cars>

File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output method="text"/>
  <xsl:template match="/">
    <xsl:for-each select="cars/manufacturer/@name">
      <xsl:value-of select="."/>
      <xsl:if test="not(position()=last())">
        <xsl:text>, </xsl:text>
      </xsl:if>
    </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>
Output:
Chevrolet, Ford, Volkswagen


last() function is in for-each element. The context is therefore all selected chapters.

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<data>
    <chapter>Chapter A</chapter>
    <chapter>Chapter B</chapter>
    <chapter>Chapter C</chapter>
    <chapter>Chapter D</chapter>
</data>
File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
      version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <TABLE>
        <xsl:for-each select="//chapter">
          <TR>
            <TD>
              <xsl:value-of select="."/>
              <xsl:text>(last = </xsl:text>
              <xsl:value-of select="last()"/>
              <xsl:text>)</xsl:text>
            </TD>
          </TR>
        </xsl:for-each>
      </TABLE>
    </xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?><TABLE><TR><TD>Chapter A(last = 4)</TD></TR><TR><TD>Chapter B(last = 4)</TD></TR><TR><TD>Chapter C(last = 4)</TD></TR><TR><TD>Chapter D(last = 4)</TD></TR></TABLE>


last() function is in template. The context is therefore a single chapter element.

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<data>
    <chapter>Chapter A</chapter>
    <chapter>Chapter B</chapter>
    <chapter>Chapter C</chapter>
    <chapter>Chapter D</chapter>
</data>
File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
      version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <TABLE>
        <xsl:for-each select="//chapter">
          <TR>
            <TD>
              <xsl:apply-templates select="."/>
            </TD>
          </TR>
        </xsl:for-each>
      </TABLE>
    </xsl:template>
    <xsl:template match="chapter">
      <xsl:value-of select="."/>
      <xsl:text>(last = </xsl:text>
      <xsl:value-of select="last()"/>
      <xsl:text>)</xsl:text>
    </xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?><TABLE><TR><TD>Chapter A(last = 1)</TD></TR><TR><TD>Chapter B(last = 1)</TD></TR><TR><TD>Chapter C(last = 1)</TD></TR><TR><TD>Chapter D(last = 1)</TD></TR></TABLE>


last() returns a number equal to the context size from the expression evaluation context

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<data>
    <AAA>
      <BBB>
        <CCC>A</CCC>
      </BBB>
      <BBB/>
      <BBB/>
    </AAA>
    <AAA>
      <BBB/>
      <BBB>
        <CCC>B</CCC>
        <CCC>C</CCC>
        <CCC>D</CCC>
        <CCC>E</CCC>
      </BBB>
    </AAA>
</data>
File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
      version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
      <DIV>
        <xsl:for-each select="//BBB">
          <xsl:call-template name="printout"/>
        </xsl:for-each>
      </DIV>
      <DIV>
        <xsl:apply-templates select="//CCC"/>
      </DIV>
      <DIV>
        <xsl:apply-templates select="//AAA[last()]//CCC"/>
      </DIV>
    </xsl:template>
    <xsl:template match="CCC">
      <xsl:call-template name="printout"/>
    </xsl:template>
    <xsl:template name="printout">
      <xsl:if test="position()=1">
        <xsl:value-of select="name()"/>
      </xsl:if>
      <xsl:text>(</xsl:text>
      <xsl:value-of select="position()"/>
      <xsl:text>/</xsl:text>
      <xsl:value-of select="last()"/>
      <xsl:text>)</xsl:text>
    </xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?><DIV>BBB(1/5)(2/5)(3/5)(4/5)(5/5)</DIV><DIV>CCC(1/5)(2/5)(3/5)(4/5)(5/5)</DIV><DIV>CCC(1/4)(2/4)(3/4)(4/4)</DIV>


last()- Returns a value equal to the context size

File: Data.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<africa>
 <source>
  <title>CIA Factbook</title>
  <url>http://www.cia.gov/cia/publications/factbook/</url>
  <populations estimate="true" year="2002"/>
<nation>
 <name>Algeria</name>
 <capital>Algiers</capital>
 <population>32277942</population>
 <cc>dz</cc>
</nation>
<nation>
 <name>Burundi</name>
 <capital>Bujumbura</capital>
 <population>6373002</population>
 <cc>bi</cc>
</nation>
<nation>
 <name>Eritrea</name>
 <capital>Asmara</capital>
 <population>4465651</population>
 <cc>er</cc>
</nation>

</africa>

File: Transform.xslt <?xml version="1.0" encoding="US-ASCII"?> <xsl:stylesheet version="1.0"

 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output method="text" />
 <xsl:template match="africa">
   <xsl:text>The nations of Africa are </xsl:text>
   <xsl:apply-templates select="nation" />
 </xsl:template>
 <xsl:template match="nation">
   <xsl:value-of select="name" />
   <xsl:if test="position() != last()">,</xsl:if>
   <xsl:if test="position() mod 5 = 0">
     <xsl:text>
</xsl:text>
   </xsl:if>
   <xsl:if test="position() = (last() - 1)">and</xsl:if>
   <xsl:if test="position() = last()">.</xsl:if>
 </xsl:template>

</xsl:stylesheet> Output: The nations of Africa are Algeria,Burundi,andEritrea.</source>


You can select the last element of given type

File: Data.xml
<?xml version="1.0" encoding="utf-8"?>
<data>    
        <chapter>Chapter A</chapter>
    <chapter>Chapter B</chapter>
    <chapter>Chapter C</chapter>
    <chapter>Chapter D</chapter>
</data>
File: Transform.xslt
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet
      version="1.0"
      xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:variable name="totalChapters">
      <xsl:value-of select="//chapter[last()]"/>
    </xsl:variable>
    <xsl:template match="/">
      <xsl:value-of select="$totalChapters"/>
    </xsl:template>
</xsl:stylesheet>
Output:
<?xml version="1.0" encoding="UTF-8"?>Chapter D