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xsl:choose
Selects one template to instantiate from a group of templates.
Format
Description
An xsl:choose element contains one or more xsl:when elements followed by zero or one xsl:otherwise element. Each xsl:when element contains a required test attribute, whose value is an expression. Each xsl:when and xsl:otherwise element contains a template.
When the XSLT processor processes an xsl:choose element, it starts by evaluating the expression in the first xsl:when element. The XSLT processor converts the result to a Boolean value. If the result is true, the XSLT processor instantiates the template contained by that xsl:when element. If the result is false, the XSLT processor evaluates the expression in the next xsl:when element.
The XSLT processor instantiates the template of only the first xsl:when element whose test expression evaluates to true. If no expressions evaluate to true and there is an xsl:otherwise element, the XSLT processor instantiates the template in the xsl:otherwise element.
If no expressions in xsl:when elements are true and there is no xsl:otherwise element, the xsl:choose element has no effect.
Tip
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You can create an xsl:choose element automatically using the XSLT mapper.
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