• Chapter 1: Getting Started with Stylus Studio®
• Chapter 2: Editing and Querying XML
• Chapter 3: Converting Non-XML Files to XML
• Chapter 4: Working with XSLT
• Chapter 5: Creating XSLT Using the XSLT Mapper
  • Overview of the XSLT Mapper
  • Source Documents
  • Target Structures
  • Mapping Source and Target Document Nodes
  • Working with XSLT Instructions in XSLT Mapper
    • What XSLT Instructions Are Represented Graphically
    • Instruction Block Ports
    • Understanding Input Ports
    • The Flow Port
    • Adding an Instruction Block to the XSLT Mapper
    • xsl:if and xsl:choose
  • Processing Source Nodes
  • Creating and Working with Templates
  • Creating an XSLT Scenario
• Chapter 6: Debugging Stylesheets
• Chapter 7: Defining XML Schemas
• Chapter 8: Defining Document Type Definitions
• Chapter 9: Writing XPath Expressions
• Chapter 10: Working with XQuery in Stylus Studio
• Chapter 11: Composing Web Service Calls
• Chapter 12: Building XML Pipelines
• Chapter 13: Publishing XML Data
• Chapter 14: Integrating with Third-Party File Systems
• Chapter 15: Extending Stylus Studio
• Chapter 16: The Stylus Studio Java API
• Chapter 17: Stylus Studio GUI Reference

Home >Online Product Documentation >Table of Contents >xsl:if and xsl:choose

xsl:if and xsl:choose

The xsl:if instruction cannot express an else condition. It has a single input port, and a single output port, as shown in Figure 230.

Figure 230. xsl:if Instruction Block

Once fully defined, the xsl:if block generates code like the following:

<Review> 
	<xsl:if test="authors/author= 'Minollo'"> 
		<xsl:value-of select="'Recommended'"/> 
	</xsl:if> 
	<xsl:if test="contains(authors/author,'Pedruzzi')"> 
		<xsl:value-of select="'A best buy'"/> 
	</xsl:if> 
</Review> 

If you need to express an else condition, use the xsl:choose instruction block. This instruction block has two output ports by default, one for the xsl:when test= attribute, and one for the one xsl:otherwise element.

Figure 231. xsl:choose Instruction Block

The xsl:choose instruction block generates code like the following:

<Review> 
	<xsl:choose> 
		<xsl:when test="authors/author= 'Minollo'"> 
			<xsl:value-of select="'Recommended'"/> 
		</xsl:when> 
		<xsl:when test="contains(authors/author,'Pedruzzi')"> 
			<xsl:value-of select="'authors best buy'"/> 
		</xsl:when> 
		<xsl:otherwise> 
			<xsl:value-of select="'bah...'"/> 
		</xsl:otherwise> 
	</xsl:choose> 
</Review> 

If you need to define more than one xsl:when test= attribute, use the xsl:choose shortcut menu (right click) and select Add When Port.