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<xsl:if> - XSLT: Extensible Stylesheet Language Transformations 编辑

XSLT/XPath Reference: XSLT elements, EXSLT functions, XPath functions, XPath axes

The <xsl:if> element contains a test attribute and a template. If the test evaluates to true, the template is processed. In this it is similar to an if statement in other languages. To achieve the functionality of an if-then-else statement, however, use the <xsl:choose> element with one <xsl:when> and one <xsl:otherwise> children.

Syntax

<xsl:if test=EXPRESSION>
	TEMPLATE
</xsl:if>

Required Attributes

test: Contains an XPath expression that can be evaluated (using the rules defined for boolean( ) if necessary) to a Boolean value. If the value is true, the template is processed; if it is not, no action is taken.