Feed: protocol. In Really Simple Subscription, FeedDemon developer Nick Bradbury suggests using the feed: protocol to make subscribing to RSS and Atom feeds easier.
Nick also says that the solution is not perfect, and I agree with that
too. But it does work and it has broad support in existing aggregators.
Its just not used on the web that much yet. But, if it were used, wed
have really simple subscription today, since its already supported in
so many aggregators.
(Someone will ask, Why not use MIME types? Answer: because
aggregators need the URL of a feed, not the content, in order to
Sometimes I think the whole issue is just that we havent agreed on a
graphic. Nick posted a Feed graphic on his post. Last year, Bryan Bell made a few: perhaps one of these would be good?
I think that orange should not be used, to avoid confusion with the orange XML graphic. [inessential.com]