Wed
Aug
27
Sites wishing to produce a SUP feed must do two things:
• Add a special >link> tag to their SUP enabled Atom or RSS feeds. This >link> tag includes the feed’s SUP-ID and the URL of the appropriate SUP feed.
• Generate a SUP feed which lists the SUP-IDs of all recently updated feeds.
FriendFeed Blog: Simple Update Protocol: Fetch updates from feeds faster