? Using <xsl:choose> in XSLT (XML)

<xsl:choose> is like an if-else if-else control structure in XSLT. It lets you apply conditional logic to your transformation based on XML data values.

How <xsl:choose> Works

• Contains multiple <xsl:when test="..."> elements to test conditions.

• Optional <xsl:otherwise> element for the default case if no conditions match.

Example

XML Input

<person>  <age>20</age></person>

XSLT with <xsl:choose>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">  <xsl:template match="person">    <div>      <xsl:choose>        <xsl:when test="age &lt; 18">          <p>Minor</p>        </xsl:when>        <xsl:when test="age &gt;= 18 and age &lt; 65">          <p>Adult</p>        </xsl:when>        <xsl:otherwise>          <p>Senior</p>        </xsl:otherwise>      </xsl:choose>    </div>  </xsl:template></xsl:stylesheet>

Explanation

• Checks the <age> value.

• Outputs "Minor" if age < 18.

• Outputs "Adult" if age between 18 and 64.

• Outputs "Senior" otherwise.

Resulting Output (HTML)

<div>  <p>Adult</p></div>

Summary

• Use <xsl:choose> for branching logic.

• Use multiple <xsl:when> for conditions.

• Use <xsl:otherwise> for default/fallback.

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