Perl with Atom Feed

While working on the PolarGrid web feed generator, I found a helpful document on how to create an Atom feed in Perl. But it's slightly out of date, and here's a short summary of my journey:

• The latest version of Perl CPAN module XML::Atom supports Atom 1.0, and the default Atom 0.3 version can be overwritten in either the Version parameter of XML::Atom::Feed and XML::Atom::Entry, or the global variable $XML::Atom::DefaultVersion.


• The Feed Validator is a very helpful debugging tool. In my case, besides everything I wanted to display in a feed, id, updated, author, self_link for the feed, and id, updated for an entry are also required. In addition, note the specific DateTime and id formats.


• To add GeoRSS encoding in the feed, don't forget to include the corresponding XML namespace: xmlns:georss="http://www.georss.org/georss"


• Use the following to output/return the feed as a HTTP response:
print "Content-type: application/atom+xml; charset=utf-8\n\n";
print $feed->as_xml