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Функция position() возвращает позицию контекста — число, равное порядковому номеру контекстного узла в обрабатываемом в данный момент множестве. Функция last() возвращает размер контекста — число, равное количеству узлов в обрабатываемом множестве. Преобразование 1 является демонстрацией использования этих функций в некоторых контекстах. В преобразовании 2 демонстрируется действие этих функций на отсортированные и неотсортированные множества узлов внутри элемента xsl:for-each.

Преобразование 1

Исходный Surf
<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>

Результат
<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>

Представление HTML
BBB(1/5)(2/5)(3/5)(4/5)(5/5)
CCC(1/5)(2/5)(3/5)(4/5)(5/5)
CCC(1/4)(2/4)(3/4)(4/4)
Преобразование XSLT
<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>



Преобразование 2

Исходный Surf
<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>

Результат
<TABLE border="1">
<TR>
<TH>Position</TH>
<TH>Last</TH>
<TH>Name</TH>
</TR>
<TR>
<TD>1</TD>
<TD>4</TD>
<TD>John</TD>
</TR>
<TR>
<TD>2</TD>
<TD>4</TD>
<TD>Charles</TD>
</TR>
<TR>
<TD>3</TD>
<TD>4</TD>
<TD>Robert</TD>
</TR>
<TR>
<TD>4</TD>
<TD>4</TD>
<TD>Anthony</TD>
</TR>
</TABLE>
<TABLE border="1">
<TR>
<TH>Position</TH>
<TH>Last</TH>
<TH>Name</TH>
</TR>
<TR>
<TD>1</TD>
<TD>4</TD>
<TD>Anthony</TD>
</TR>
<TR>
<TD>2</TD>
<TD>4</TD>
<TD>Charles</TD>
</TR>
<TR>
<TD>3</TD>
<TD>4</TD>
<TD>John</TD>
</TR>
<TR>
<TD>4</TD>
<TD>4</TD>
<TD>Robert</TD>
</TR>
</TABLE>

Представление HTML
Position Last Name
1 4 John
2 4 Charles
3 4 Robert
4 4 Anthony
Position Last Name
1 4 Anthony
2 4 Charles
3 4 John
4 4 Robert
Преобразование XSLT
<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
<TABLE border="1">
<TR>
<TH>Position</TH>
<TH>Last</TH>
<TH>Name</TH>
</TR>
<xsl:for-each select="//AAA[last()]//CCC">
<TR>
<TD>
<xsl:value-of select="position()"/>
</TD>
<TD>
<xsl:value-of select="last()"/>
</TD>
<TD>
<xsl:value-of select="text()"/>
</TD>
</TR>
</xsl:for-each>
</TABLE>
<TABLE border="1">
<TR>
<TH>Position</TH>
<TH>Last</TH>
<TH>Name</TH>
</TR>
<xsl:for-each select="//AAA[last()]//CCC">
<xsl:sort order="ascending" select="text()"/>
<TR>
<TD>
<xsl:value-of select="position()"/>
</TD>
<TD>
<xsl:value-of select="last()"/>
</TD>
<TD>
<xsl:value-of select="text()"/>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>


</xsl:stylesheet>

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