Bob Wyman wrote:
Unfortunately, while RSS and Atom both contain mechanisms to identify their "HTML" alternates, there isn't any clear mechanism available to discover alternate feeds.
Without responding to the rest of the message, I'll note that this statement is somewhat inaccurate wrt Atom. You can point to an alternate feed like this
<link rel="alternate" type="some/feed" href="..." />
Of course, you can't have two alternates with the same media type...
Robert Sayre