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XSLT variables actually have a lot more in common with constants in many programming languages
such as XSLT and are
used for a similar purpose in each way. If we use the same value multiple times
in our style sheet, and there's a
possibility that we'll have to change them all to a different value, it's better to assign that value
to a variable and use references to the variable instead. Then, if we need to change the
value when re-using the style sheet, we only change the value assigned in the creation of that variable
in XSLT.
XSLT variables are more common like a variable in algebra than with a variable in a
typical programming language. It's a name that represents a value and, within a
specific
application of a template, it will never represent any other value -- it can't be reset using
anything described in the XSLT Recommendation.
Some XSLT processors offer a special extension function to allow the resetting
of variables.
The <xsl:variable> element declares a global or local variable in a style sheet and gives it
a value. Because XSLT permits no side-effects, once the value of
the variable has been well-known, it remains the same until the variable goes out of scope.
Here in XSLT Tutorial you will learn all about to use of XSLT Variable.
Syntax for XSLT Variables
<xsl:variable name=NAME select=EXPRESSION >
TEMPLATE
</xsl:variable>
Example of XSLT Variables
XML Code for XSLT Variable Example [xslt_variable_example.xml]
<?xml version="1.0" encoding="ISO-8859-15"?>
<?xml-stylesheet type="text/xsl" href="xslt_variable_example.xsl"?>
<globalGuideLine>
<employee>
<FirstName>Austin</FirstName>
<LastName>Hennery</LastName>
<gender>m</gender>
</employee>
<employee>
<FirstName>Angela</FirstName>
<LastName>Julie</LastName>
<gender>f</gender>
</employee>
......
......
......
</globalGuideLine>
XSLT Source file for XSLT Varialbe Example [xslt_variable_example.xsl]
<?xml version="1.0" encoding="ISO-8859-1"?>
<html xsl:version="1.0" xmlns:xsl="https://www.w3.org/1999/XSL/Transform"
xmlns="https://www.w3.org/1999/xhtml">
<body style="font-family:Arial,helvetica,sans-serif;font-size:12pt;
background-color:#EEEEEE">
<xsl:variable name="xslt_variable_size">10pt</xsl:variable>
<xsl:variable name="xslt_variable_color">blue</xsl:variable>
<xsl:for-each select="globalGuideLine/employee">
<div style="background-color: #cccccc;color:000000;padding:0px">
<span style="color:#000000">
<font size="{$xslt_variable_size}" color="{$xslt_variable_color}">
<xsl:value-of select="FirstName"/> <xsl:value-of select="LastName"/>
</font>
</span>
</div>
<div style="margin-left:20px;margin-bottom:1em;font-size:10pt">
<xsl:value-of select="description"/>
<span style="font-style:none">
<xsl:if test="gender='m'">
<font color="{$xslt_variable_color}">
<b>Mr. </b>
</font>
<xsl:value-of select="FirstName"/>
is working at Global Guide Line
</xsl:if>
<xsl:if test="gender='f'">
<font color="{$xslt_variable_color}"><b>Miss </b></font>
<xsl:value-of select="FirstName"/> is working at Global Guide Line
</xsl:if>
</span>
</div>
</xsl:for-each>
</body>
</html>
Sources of XSLT Variables Examples
XSLT Tutorial section of complete sources and outputs view by simply clicking on file name of XSLT, XML,
Out Put XSLT Variable files below.
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