Name
<xsl:if>
Implements an if
statement. It contains a test
attribute and an XSLT template. If the test
attribute evaluates to the boolean
value true
, the XSLT template is
processed. This element implements an if
statement only; if you need an
if-then-else statement, use the <xsl:choose>
element with a single
<xsl:when>
and a single
<xsl:otherwise>
.
Category
Instruction.
Required Attribute
test
Contains a boolean expression. If it evaluates to the boolean value
true
, then the XSLT template inside the<xsl:if>
element is processed.
Optional Attributes
None.
Content
An XSLT template.
Appears in
<xsl:if>
appears inside
a template.
Defined in
[1.0] XSLT section 9.1, “Conditional
Processing with xsl:if
.”
[2.0] XSLT section 8.1, “Conditional
Processing with xsl:if
.”
Example
We’ll illustrate the <xsl:if>
element with the following
stylesheet:
<?xml version="1.0"?>
<!-- if.xsl -->
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:text>
</xsl:text>
<xsl:text>Here are the odd-numbered items from the list:</xsl:text>
<xsl:text>
</xsl:text>
<xsl:for-each select="list/listitem">
<xsl:if test="(position() mod 2) = 1">
<xsl:number format="1. "/>
<xsl:value-of select="."/>
<xsl:text>
</xsl:text>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
This stylesheet uses the <xsl:if>
element to see whether a
given <listitem>
’s position is an odd number. If it is, we write it to the result tree. We’ll test our ...
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