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Variabili di XSL

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Regolando il XSl variabile

lo stylesheet 1 e lo stylesheet 3 mostra i sensi differenti di regolazione del xsl: variabile, stylesheet 2 di XSLT e stylesheet 4 di XSLT di regolazione del xsl: param.



XML Source

<source>
<chapter>Chapter A</chapter>
<chapter>Chapter B</chapter>
<chapter>Chapter C</chapter>
<chapter>Chapter D</chapter>
</source>


Output 1

<TABLE>
<TR>
<TD>Chapter A (1/4)</TD>
</TR>
<TR>
<TD>Chapter B (2/4)</TD>
</TR>
<TR>
<TD>Chapter C (3/4)</TD>
</TR>
<TR>
<TD>Chapter D (4/4)</TD>
</TR>
</TABLE>


XSL stylesheet 1

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:variable name="totalChapters">
<xsl:value-of select="count(//chapter)"/>
</xsl:variable>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//chapter">
<TR>
<TD>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="position()"/>
<xsl:text>/</xsl:text>
<xsl:value-of select="$totalChapters"/>
<xsl:text>)</xsl:text>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>





XML Source

<source>
<chapter>Chapter A</chapter>
<chapter>Chapter B</chapter>
<chapter>Chapter C</chapter>
<chapter>Chapter D</chapter>
</source>


Output 2

<TABLE>
<TR>
<TD>Chapter A (1/4)</TD>
</TR>
<TR>
<TD>Chapter B (2/4)</TD>
</TR>
<TR>
<TD>Chapter C (3/4)</TD>
</TR>
<TR>
<TD>Chapter D (4/4)</TD>
</TR>
</TABLE>


XSL stylesheet 2

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:param name="totalChapters">
<xsl:value-of select="count(//chapter)"/>
</xsl:param>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//chapter">
<TR>
<TD>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="position()"/>
<xsl:text>/</xsl:text>
<xsl:value-of select="$totalChapters"/>
<xsl:text>)</xsl:text>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>





XML Source

<source>
<chapter>Chapter A</chapter>
<chapter>Chapter B</chapter>
<chapter>Chapter C</chapter>
<chapter>Chapter D</chapter>
</source>


Output 3

<TABLE>
<TR>
<TD>Chapter A (1/4)</TD>
</TR>
<TR>
<TD>Chapter B (2/4)</TD>
</TR>
<TR>
<TD>Chapter C (3/4)</TD>
</TR>
<TR>
<TD>Chapter D (4/4)</TD>
</TR>
</TABLE>


XSL stylesheet 3

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:variable name="totalChapters" select="count(//chapter)"/>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//chapter">
<TR> <TD>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="position()"/>
<xsl:text>/</xsl:text>
<xsl:value-of select="$totalChapters"/>
<xsl:text>)</xsl:text>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>





XML Source

<source>

<chapter>Chapter A</chapter>
<chapter>Chapter B</chapter>
<chapter>Chapter C</chapter>
<chapter>Chapter D</chapter>
</source>


OutPut 4

<TABLE>
<TR>
<TD>Chapter A (1/4)</TD>
</TR>
<TR>
<TD>Chapter B (2/4)</TD>
</TR>
<TR>
<TD>Chapter C (3/4)</TD>
</TR>
<TR>
<TD>Chapter D (4/4)</TD>
</TR>
</TABLE>


XSL stylesheet 4

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:param name="totalChapters" select="count(//chapter)"/>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//chapter">
<TR>
<TD>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="position()"/>
<xsl:text>/</xsl:text>
<xsl:value-of select="$totalChapters"/>
<xsl:text>)</xsl:text>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>



Variabili con lo stesso nome

Stylesheet può fare ha parecchie variabili con lo stesso nome. Lo stylesheet 1 di XSL dimostra come recuperare il valore della variabile globale che ha stesso nome di quello di quello locale. Il valore della variabile locale è limitato al xsl: quando elemento. Il resto della mascherina quindi vede soltanto una variabile globale.



XML Source

<source>
<chapter>Chapter A</chapter>
<chapter>Chapter B</chapter>
<chapter>Chapter C</chapter>
<chapter>Chapter D</chapter>
</source>


Output

<TABLE>
<TR>
<TD>First chapter : Chapter A</TD>
</TR>
<TR>
<TD>Chapter : Chapter B</TD>
</TR>
<TR>
<TD>Chapter : Chapter C</TD>
</TR>
<TR>
<TD>Last chapter : Chapter D</TD>
</TR>
</TABLE>


XSL stylesheet

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:variable name="text">Chapter</xsl:variable>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//chapter">
<TR>
<TD>
<xsl:variable name="text">
<xsl:choose>
<xsl:when test="position() = 1">First chapter</xsl:when>
<xsl:when test="position()=last()">Last chapter</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$text"/>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:value-of select="$text"/>
<xsl:text> : </xsl:text>
<xsl:value-of select="."/>
</TD>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
</xsl:stylesheet>



Elemento di Con-Param di XSL

I parametri per la mascherina possono essere passati con un xsl: elemento di con-param. Se una mascherina contiene il xsl: elemento di param che ha stesso nome di quello di un attributo nome di xsl: il con-param, questo valore è usato. Lo stylesheet 1 di XSL mostra l'esempio tipico. Se desiderate passare la variabile, dovreste dovere definire questa variabile con il xsl: elemento di param. Guardare lo stylesheet 2 di XSL per il metodo errato.



XML Source

<source>
<number>1</number>
<number>3</number>
<number>4</number>
<number>17</number>
<number>8</number>
</source>


Output

<TABLE>
<TR>
<TH>1 (odd)</TH>
</TR>
<TR>
<TH>3 (odd)</TH>
</TR>
<TR>
<TH>4 (even)</TH>
</TR>
<TR>
<TH>17 (odd)</TH>
</TR>
<TR>
<TH>8 (even)</TH>
</TR>
</TABLE>


XSL stylesheet 1

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//number">
<TR>
<TH>
<xsl:choose>
<xsl:when test="text() mod 2">
<xsl:apply-templates select=".">
<xsl:with-param name="type">odd</xsl:with-param>
</xsl:apply-templates>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="."/>
</xsl:otherwise>
</xsl:choose>
</TH>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
<xsl:template match="number">
<xsl:param name="type">even</xsl:param>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="$type"/>
<xsl:text>)</xsl:text>
</xsl:template>
</xsl:stylesheet>


XSL stylesheet 2



XSLT stylesheet

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:template match="/">
<TABLE>
<xsl:for-each select="//number">
<TR>
<TH>
<xsl:choose>
<xsl:when test="text() mod 2">
<xsl:apply-templates select=".">
<xsl:with-param name="type">odd</xsl:with-param>
</xsl:apply-templates>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="."/>
</xsl:otherwise>
</xsl:choose>
</TH>
</TR>
</xsl:for-each>
</TABLE>
</xsl:template>
<xsl:template match="number">
<xsl:variable name="type">even</xsl:variable>
<xsl:value-of select="."/>
<xsl:text> (</xsl:text>
<xsl:value-of select="$type"/>
<xsl:text>)</xsl:text>
</xsl:template>
</xsl:stylesheet>



regolazione del xsl: variabile,

La variabile può tenere il frammento dell'albero di risultato. I funzionamenti che sono consentiti sul frammento dell'albero di risultato sono il sottoinsieme di quelli consentiti sul nodo-si sono regolati. Il funzionamento è consentito sul frammento dell'albero di risultato soltanto se quel funzionamento dovesse essere consentito sulla stringa, funzionamento su stringa può coinvolgere in primo luogo convertire una stringa in numero o in booleano. In particolare, non è consentito per usare “/, // e []„ operatori sui frammenti dell'albero di risultato. Quando il funzionamento consentito è realizzato sul frammento dell'albero di risultato, è effettuato esattamente nel senso poichè sarebbe su un equivalente nodo-si è regolato.



XML Source

<source>
<TABLE border="1">
<TR>
<TD>AAA</TD>
<TD>BBB</TD>
</TR>
<TR>
<TD>aaa</TD>
<TD>bbb</TD>
</TR>
</TABLE>
<TABLE border="1">
<TR>
<TD>1111111</TD>
</TR>
<TR>
<TD>22222222</TD>
</TR>
</TABLE>
</source>


Output

<TABLE border="1">
<TR>
<TD>1111111</TD>
</TR>
<TR>
<TD>22222222</TD>
</TR>
</TABLE>
<TABLE border="1">
<TR>
<TD>AAA</TD>
<TD>BBB</TD>
</TR>
<TR>
<TD>aaa</TD>
<TD>bbb</TD>
</TR>
</TABLE>
<TABLE border="1">
<TR>
<TD>1111111</TD>
</TR>
<TR>
<TD>22222222</TD>
</TR>
</TABLE>


XSL stylesheet

<xsl:stylesheet version = '1.0'
xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>
<xsl:variable name="A1">
<xsl:copy-of select="//TABLE[1]"/>
</xsl:variable>
<xsl:variable name="A2">
<xsl:copy-of select="//TABLE[2]"/>
</xsl:variable>
<xsl:template match="/">
<xsl:copy-of select="$A2"/> <xsl:copy-of select="$A1"/> <xsl:copy-of select="$A2"/>
</xsl:template>
</xsl:stylesheet>




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