xsl:when

only for RuBoard

xsl:when provides for multiple condition evaluation.

The xsl:when element is analgous to a case statement in formal programming languages.

Attributes

Attribute Name	Enforced	Description	Values
`test`	Required	The condition to test. If the expression evaluates to Boolean True, the results are included in the output.	A Boolean expression
`select`	Optional	The value of the variable. If specified, the content of the `xsl:variable` element must be empty.	Expression

Example

You can use the xsl:choose element to test if an attribute exists or not. Using the following XML instance document, the image attribute is not specified for NewRiders.com but is available for xmlandasp.net :

 <?xml version="1.0" encoding="utf-8" ?>  <links>       <link name="NewRiders.com" />       <link name="xmlandasp.net" image="images/xmlandasp.gif"/>  </links>

The following stylesheet displays images when the image attribute is specified; otherwise , it displays the value of the name attribute:

 <?xml version="1.0" encoding="UTF-8" ?>  <xsl:stylesheet version="1.0"  xmlns:xsl="http://www.w3.org/1999/XSL/Transform">       <xsl:template match="/">            <xsl:apply-templates select="links/link" />       </xsl:template>       <xsl:template match="link">            <xsl:choose>                 <xsl:when test="@image">                       <img>                         <xsl:attribute name="src">                          <xsl:value-of select="@image" />                         </xsl:attribute>                       </img>                 </xsl:when>                 <xsl:otherwise>                      <xsl:value-of select="@name"/>                 </xsl:otherwise>          </xsl:choose>       </xsl:template>  </xsl:stylesheet>

Parent Elements

 xsl:choose

Child Elements

 xsl:apply-templates, xsl:attribute, xsl:call-template, xsl:choose,  xsl:comment, xsl:copy, xsl:copy-of, xsl:element, xsl:for-each, xsl:if,  xsl:processing-instruction, xsl:value-of, xsl:variable, output elements

only for RuBoard