HTML::RSSAutodiscovery.pm - A perl module providing methods for retreiving RSS-ish information from an HTML document. nospum.net/HTML-RSSAutodiscovery.html
The Autodiscovery Standard - A temporary description of the Autodiscovery of RSS system. I expect this to be superceded by something more permenent soon. diveintomark.org/archives/2002/06/02.html#important_change_to_the_link_tag