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Posizionare la funzione
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La funzione �di posizione� ritorni il numero uguale alla posizione di contesto e �l'ultima� funzione ritorni il numero uguale al formato di contesto da un contesto di valutazione di espressione. Lo stylesheet 1 di XSL dimostra l'uso di queste due funzioni in vari dei contesti.
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XML Source
<source>
<AAA>
<BBB>
<CCC>Carl</CCC>
</BBB>
<BBB/>
<BBB/>
</AAA>
<AAA>
<BBB/>
<BBB>
<CCC>John</CCC>
<CCC>Charles</CCC>
<CCC>Robert</CCC>
<CCC>Anthony</CCC>
</BBB>
</AAA>
</source>
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Output
<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>
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XSL stylesheet
<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>
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Funzione di conteggio
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Una funzione di conteggio restituisce il numero di nodi presenti in una discussione nodo-si � regolata.
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XML Source
<source>
<AAA>
<CCC/>
<BBB>
<CCC>Carl</CCC>
</BBB>
<BBB/>
<BBB/>
</AAA>
<AAA>
<CCC/>
<BBB/>
<BBB>
<CCC>John</CCC>
<CCC>Charles</CCC>
<CCC>Robert</CCC>
<CCC>Anthony</CCC>
</BBB>
</AAA>
</source>
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Output
<DIV>
<B>//AAA : </B>2</DIV>
<DIV>
<B>//CCC : </B>7</DIV>
<DIV>
<B>//AAA/CCC : </B>2</DIV>
<DIV>
<B>//CCC[text()]) : </B>5</DIV>
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XSL stylesheet
<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:template match="/">
<DIV>
<B>
<xsl:text>//AAA : </xsl:text>
</B>
<xsl:value-of select="count(//AAA)"/>
</DIV>
<DIV>
<B>
<xsl:text>//CCC : </xsl:text>
</B>
<xsl:value-of select="count(//CCC)"/>
</DIV>
<DIV>
<B>
<xsl:text>//AAA/CCC : </xsl:text>
</B>
<xsl:value-of select="count(//AAA/CCC)"/>
</DIV>
<DIV>
<B>
<xsl:text>//CCC[text()]) : </xsl:text>
</B>
<xsl:value-of select="count(//CCC[text()])"/>
</DIV>
</xsl:template>
</xsl:stylesheet>
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Funzione di identificazione
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Una funzione �dell'identificazione� seleziona gli elementi dalla loro identificazione che � unica. Lo stylesheet 1 di XSL mostra gli esempi semplici del relativo uso.
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XML Source
<!DOCTYPE source [
<!ELEMENT chapter ANY>
<!ATTLIST chapter id ID #REQUIRED>
<!ELEMENT title ANY>
<!ATTLIST title id CDATA #REQUIRED>
<!ELEMENT text ANY>
<!ATTLIST text value ID #REQUIRED>
]>
<source>
<chapter id="intro">Introduction</chapter>
<chapter id="body">
<title id="t1">BODY</title>
<text value="text1">text text text</text>
</chapter>
<chapter id="end">THE END</chapter>
</source>
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Output
<P>Introduction</P>
<P>text text text</P>
<P>text text text</P>
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XSL stylesheet
<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:template match="/">
<P>
<xsl:value-of select="id('intro')"/>
</P>
<P>
<xsl:value-of select="id('body')/text"/>
</P>
<P>
<xsl:value-of select="id('text1')"/>
</P>
</xsl:template>
</xsl:stylesheet>
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Locale-nome & funzione Namespace-uri
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�Il locale-nome� e �namespace-uri ()� sono usati per ottenere le informazioni sui nomi di attributo e dell'elemento e sui namespaces.
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XML Source
<source xmlns:zvon="http://zvon.org/" xmlns:ict="XXX" >
<zvon:id>ZvonAAA</zvon:id>
<zvon:size>258</zvon:size>
<ict:id>ICT1258</ict:id>
</source>
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Output
<TABLE border="1">
<TR>
<TH>name</TH>
<TH>local</TH>
<TH>URI</TH>
</TR>
<TR>
<TD>source</TD>
<TD>source</TD>
<TD/>
</TR>
<TR>
<TD>zvon:id</TD>
<TD>id</TD>
<TD>http://zvon.org/</TD>
</TR>
<TR>
<TD>zvon:size</TD>
<TD>size</TD>
<TD>http://zvon.org/</TD>
</TR>
<TR>
<TD>ict:id</TD>
<TD>id</TD>
<TD>XXX</TD>
</TR>
</TABLE>
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XSL stylesheet
<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:template match="/">
<TABLE border="1">
<TR>
<TH>name</TH>
<TH>local</TH>
<TH>URI</TH>
</TR>
<xsl:apply-templates select="//*"/>
</TABLE>
</xsl:template>
<xsl:template match="*">
<TR>
<TD>
<xsl:value-of select="name()"/>
</TD>
<TD>
<xsl:value-of select="local-name()"/>
</TD>
<TD>
<xsl:value-of select="namespace-uri()"/>
</TD>
</TR>
</xsl:template>
</xsl:stylesheet>
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