system-property() Function  
Returns the value of the system property named by the argument to the function.
 
Description

By definition, all XSLT processors must support three system properties:

xsl:version
A floating-point number representing the version of XSLT implemented by this XSLT processor. As of this writing, the only official version of XSLT supported by any XSLT processors is 1.0 .

xsl:vendor
A string that identifies the vendor of this XSLT processor.

xsl:vendor-url
A string containing the URL identifying the vendor of the XSLT processor. This string is typically the home page of the vendor's web site.

 
Inputs

The XSLT 1.0 specification defines three properties: xsl:version, xsl:vendor, and xsl:vendor-url. These properties must be supported by all XSLT processors. Other properties may be supported by individual processors; check your processor's documentation for more information.
 
Output

The value of the queried property.

 
Defined in

XSLT section 12.4, Miscellaneous Additional Functions.

 
Example

Here is a stylesheet that queries different properties of the XSLT processor:

<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  
  <xsl:output method="text"/>

  <xsl:variable name="newline">
<xsl:text>
</xsl:text>
  </xsl:variable>

  <xsl:template match="/">
    <xsl:text>xsl:version = "</xsl:text>
    <xsl:value-of select="system-property('xsl:version')"/>
    <xsl:text>"</xsl:text><xsl:value-of select="$newline"/>
    <xsl:text>xsl:vendor = "</xsl:text>
    <xsl:value-of select="system-property('xsl:vendor')"/>
    <xsl:text>"</xsl:text><xsl:value-of select="$newline"/>
    <xsl:text>xsl:vendor-url = "</xsl:text>

    <xsl:value-of select="system-property('xsl:vendor-url')"/>
    <xsl:text>"</xsl:text><xsl:value-of select="$newline"/>
  </xsl:template>

</xsl:stylesheet>

When the stylesheet is applied toward any XML document with the Xalan XSLT processor (invoked by the following command):

java org.apache.xalan.xslt.Process -in test1.xml -xsl systemproperties.xsl

The results are:

xsl:version = "1"
xsl:vendor = "Apache Software Foundation"
xsl:vendor-url = "http://xml.apache.org/xalan"

The following command invokes the results for Michael Kay's Saxon processor:

java com.icl.saxon.StyleSheet test1.xml systemproperties.xsl

Here are the results:

xsl:version = "1"                                                      
xsl:vendor = "SAXON 6.4.3 from Michael Kay"                     
xsl:vendor-url = "http://saxon.sourceforge.net"

We invoked Oracle's XML parser with:

java oracle.xml.parser.v2.oraxsl test1.xml systemproperties.xsl

Here are the results:

xsl:version = "1"
xsl:vendor = "Oracle Corporation."
xsl:vendor-url = "http://www.oracle.com"

We invoked James Clark's XT processor with:

java com.jclark.xsl.sax.Driver test1.xml systemproperties.xsl

Here are the results:

xsl:version = "1"
xsl:vendor = "James Clark"
xsl:vendor-url = "http://www.jclark.com/"

Finally, we invoked Microsoft's XSLT processor with:

msxsl test1.xml systemproperties.xsl

Here are the results:

xsl:version = "1"
xsl:vendor = "Microsoft"
xsl:vendor-url = "http://www.microsoft.com"