Now then, which of these will you actually use? The most common ones are dc, content, and admin. For technical reasons, if you use admin, you'll almost certainly end up using rdf too, so declare both.
Here is a relatively sophisticated RSS document that uses these common namespaces:
My webloghttp://www.example.com/
My cute taglineen-usMe (me@example.com)Copyright 2002 Me2002-10-18T16:10:15-05:00Take up knittinghttp://www.example.com/archives/000054.html
Hidden Mozilla preferences. XSLT tips. Transcript of the Eldred case.
