<?xml ...>" in the very first line. Also, you have to specify the stylesheet that is to be used to process the XML document to HTML. This is done using a standard "xml-stylesheet" processing instruction(http://www.w3.org/TR/xml-stylesheet/), with the name of a page containing the stylesheet as the "href" parameter.
MoniWiki support two type of XSLT processors. One is the xslt.php, the other is xsltproc.php. xslt.php need a xslt module for PHP and xsltproc.php need the xsltproc.
<?xml version="1.0" encoding="ISO-8859-1"?>
<?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>
~cpp
<?xml version="1.0" encoding="ISO-8859-1"?>
<?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>