XsltVersion

<?xml version="1.0"?>

<?xml-stylesheet href="XsltVersion" type="text/xml"?>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

   <xsl:output method="html" omit-xml-declaration="yes" indent="no"/>

   <xsl:template match="/">
     This Wiki is running an XSLT engine by
     <xsl:value-of select="system-property('xsl:vendor')"/>
     (<a href="{system-property('xsl:vendor-url')}"><xsl:value-of select="system-property('xsl:vendor-url')"/></a>)
     implementing XSLT v<xsl:value-of select="system-property('xsl:version')"/>
   </xsl:template>

</xsl:stylesheet>