Below is a link to an rss document written by Mr.Connors. It has a bunch of comments on the right side to help you understand the use and meaning of the code. There is a lot of information about RSS, but this should be enough to get started.
There are a few extras that serve functional purposes.It is hosted in Angelfire, and seems to work fine. You can subscribe to the page in I Tunes and see how it behaves.
The page doesn't seem to work as well in Explorer as it does in Firefox.
http://www.angelfire.com/indie/duxtech/docs/rssinfo.html
Direct link to the rss.xml page - http://www.angelfire.com/indie/duxtech/docs/rss.xml
Right click on this link and choose save as, open it in notepad.
http://dhspodcasting.pbwiki.com/f/rss.xml