Unlike in JAVA, there doesn't exist a way in PERL to generate modules from Web Ontologies (OWL). Well, not until recently!
As part of a bigger effort, the CPAN module, SADI, contains a script for generating fully functional PERL modules from Web Ontologies. The script is called sadi-generate-datatypes.pl and is automatically installed along side the SADI module. Under the hood it is using RDF/OWL parsing code from PLUTO (a module built on from a project from IBM).
I wont go into the details for how to use this module here (there is ample documentation available on CPAN for this module). I would like to point the interested reader to the documentation for generating the Perl modules. Go to http://search.cpan.org/dist/SADI/ and at the very bottom you will see under the "Other Files" header a link called doc/working_with_datatypes.html. That file should get you going.
