History
In 2006 the feed URI scheme was supported by several popular desktop aggregators, including NetNewsWire, FeedDemon, Safari, and Flock. As of 2011 no effort seems to be underway to officially register the scheme at IANA.
Critics hold that the purpose of the feed URI scheme is better served by MIME types, or that it is not a user-friendly solution for the problem of feed subscription, since a user who has not installed the appropriate software will receive an unhelpful browser error message on clicking a link to a feed URI.
The feed URI scheme was suggested in 2003 in draft-obasanjo-feed-URI-scheme-01 and 02. These expired drafts were not submitted as Internet drafts; the author later contributed to the work on the atom standard.
Read more about this topic: Feed URI Scheme