"if" - The Conditional Element

XML Tutorials - Herong's Tutorial Examples - Version 5.05, by Dr. Herong Yang

XML Tutorials - Herong's Tutorial Examples

∟XSLT Elements as Programming Statements

∟"if" - The Conditional Element

This section describes the 'if' element, which is used in the content of a 'template' element. The 'if' element is a conditional statement that be used to put a block of output content under a logical condition.

if: A child element used as part of the content of a "template element. A "if" element serves as a conditional statement to do things conditionally. The syntax of the "if" element is:

<xsl:if test="condition">
 content
</xsl:if>

where the "condition" is an XPath expression to return Boolean value, and "content" is a mixture literal data and XSLT elements to be used only if the condition is true.

If the specified condition returns true, the specified content will be used. If the specified condition returns false, the specified content will be ignored.

Here are some examples of "if" elements:

<!-- for expired elements, output a message -->
<xsl:if test="@status='expired'">
 This <xsl:value-of select="name(.)"/> record has expired!
</xsl:if>

<!-- for active elements, apply transformations -->
<xsl:if test="@status='active'">
 <xsl:apply-templates/>
</xsl:if>

Last update: 2014.

Table of Contents

About This Book

Introduction of XML (eXtensible Markup Language)

XML File Syntax

XML File Browsers

DOM (Document Object Model) Programming Interface

SAX (Simple API for XML) Programming Interface

DTD (Document Type Definition) Introduction

Syntaxes of DTD Statements

Validating an XML Document against the Specified DTD Document Type

XSD (XML Schema Definition) Introduction