Xerl is an open source website template engine (TE) with some features of a Content Management System (CMS) programmed in object oriented Perl (boosted by FastCGI) and using XML.
<?xml version="1.0" encoding="ISO-8859-1" standalone="yes" ?>
<content>
<pagetitle>foo.pl</pagetitle>
<text>
Nothing here to see yet.
</text>
</content>