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Dans la Feuille de style XSLT 1 , des chaînes de caractères constituent les arguments de la fonction boolean(). Une chaîne de caractères est vraie si et seulement si sa longueur n'est pas nulle. Dans la Feuille de style XSLT 2 , le texte est converti en nombres, puis soumis à la fonction boolean(). Feuille de style XSLT 3Compare "0" en tant que chaîne de caractères et en tant que nombre. Feuille de style XSLT 4 emploie des ensembles de noeuds comme arguments de la fonction boolean().

Feuille de style XSLT 1

Source Surf

<source>

<text>124</text>
<text>AB234</text>
<text>-16</text>
<text>0</text>
<text/>
<text>false</text>

</source>

Sortie

<TABLE border="1">
  <TR>
     <TH>text</TH>
     <TH>boolean</TH>
  </TR>
  <TR>
     <TD>124</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>AB234</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>-16</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>0</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD/>
     <TD>false</TD>
  </TR>
  <TR>
     <TD>false</TD>
     <TD>true</TD>
  </TR>
</TABLE>

Vue HTML

text	boolean
124	true
AB234	true
-16	true
0	true
	false
false	true

Feuille de style XSLT

<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <TABLE border="1">
          <TR>
               <TH>text</TH>
               <TH>boolean</TH>
          </TR>
          <xsl:for-each select="//text">
               <TR>
                    <TD>
                         <xsl:value-of select="."/>
                         <xsl:text/>
                    </TD>
                    <TD>
                         <xsl:value-of select="boolean(text())"/>
                    </TD>
               </TR>
          </xsl:for-each>
     </TABLE>
</xsl:template>

</xsl:stylesheet>

Feuille de style XSLT 2

Source Surf

<source>

<text>124</text>
<text>AB234</text>
<text>-16</text>
<text>0</text>
<text/>
<text>false</text>

</source>

Sortie

<TABLE border="1">
  <TR>
     <TH>text</TH>
     <TH>number</TH>
     <TH>boolean</TH>
  </TR>
  <TR>
     <TD>124</TD>
     <TD>124</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>AB234</TD>
     <TD>NaN</TD>
     <TD>false</TD>
  </TR>
  <TR>
     <TD>-16</TD>
     <TD>-16</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>0</TD>
     <TD>0</TD>
     <TD>false</TD>
  </TR>
  <TR>
     <TD/>
     <TD>NaN</TD>
     <TD>false</TD>
  </TR>
  <TR>
     <TD>false</TD>
     <TD>NaN</TD>
     <TD>false</TD>
  </TR>
</TABLE>

Vue HTML

text	number	boolean
124	124	true
AB234	NaN	false
-16	-16	true
0	0	false
	NaN	false
false	NaN	false

Feuille de style XSLT

<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <TABLE border="1">
          <TR>
               <TH>text</TH>
               <TH>number</TH>
               <TH>boolean</TH>
          </TR>
          <xsl:for-each select="//text">
               <TR>
                    <TD>
                         <xsl:value-of select="."/>
                         <xsl:text/>
                    </TD>
                    <TD>
                         <xsl:value-of select="number(text())"/>
                         <xsl:text/>
                    </TD>
                    <TD>
                         <xsl:value-of select="boolean(number(text()))"/>
                    </TD>
               </TR>
          </xsl:for-each>
     </TABLE>
</xsl:template>

</xsl:stylesheet>

Feuille de style XSLT 3

Source Surf

<source>

<text>124</text>
<text>AB234</text>
<text>-16</text>
<text>0</text>
<text/>
<text>false</text>

</source>

Sortie

<P>The boolean value of "0" is <B>true</B> if "0" is a string, but <B>false</B> if "0" is a number.</P>

Vue HTML

The boolean value of "0" is true if "0" is a string, but false if "0" is a number.

Feuille de style XSLT

<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <P>
          <xsl:text>The boolean value of "0" is </xsl:text>
          <B>
               <xsl:value-of select="boolean(//text[text()='0'])"/>
          </B>
          <xsl:text> if "0" is a string, but </xsl:text>
          <B>
               <xsl:value-of select="boolean(number((//text[text()='0'])))"/>
          </B>
          <xsl:text> if "0" is a number.</xsl:text>
     </P>
</xsl:template>

</xsl:stylesheet>

Feuille de style XSLT 4

Source Surf

<source>

<text>124</text>
<text>AB234</text>
<text>-16</text>
<text>0</text>
<text/>
<text>false</text>

</source>

Sortie

<TABLE border="1">
  <TR>
     <TH>node-set</TH>
     <TH>boolean</TH>
  </TR>
  <TR>
     <TD>/</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>//text</TD>
     <TD>true</TD>
  </TR>
  <TR>
     <TD>//number</TD>
     <TD>false</TD>
  </TR>
  <TR>
     <TD>//text[23]</TD>
     <TD>false</TD>
  </TR>
</TABLE>

Vue HTML

node-set	boolean
/	true
//text	true
//number	false
//text[23]	false

Feuille de style XSLT

<xsl:stylesheet version = '1.0'
     xmlns:xsl='http://www.w3.org/1999/XSL/Transform'>

<xsl:template match="/">
     <TABLE border="1">
          <TR>
               <TH>node-set</TH>
               <TH>boolean</TH>
          </TR>
          <TR>
               <TD>
                    <xsl:text>/</xsl:text>
               </TD>
               <TD>
                    <xsl:value-of select="boolean(/)"/>
               </TD>
          </TR>
          <TR>
               <TD>
                    <xsl:text>//text</xsl:text>
               </TD>
               <TD>
                    <xsl:value-of select="boolean(//text)"/>
               </TD>
          </TR>
          <TR>
               <TD>
                    <xsl:text>//number</xsl:text>
               </TD>
               <TD>
                    <xsl:value-of select="boolean(//number)"/>
               </TD>
          </TR>
          <TR>
               <TD>
                    <xsl:text>//text[23]</xsl:text>
               </TD>
               <TD>
                    <xsl:value-of select="boolean(//text[23])"/>
               </TD>
          </TR>
     </TABLE>
</xsl:template>

</xsl:stylesheet>

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