You are looking at a very old, but free version of the course. If you are interesed the most recent version, check it out on the Perl Maven site.

12.10. Test using W3C validator

http://validate.w3c.org/

- Module to access that web site.
- Module to access the same service installed on a local web server.
- Module to access the validating code without a web server.


If you are interested in on-site trainings by the author, please contact me directly.