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Re: Atom feed refresh rates

--On May 5, 2005 8:07:15 AM -0500 Mark Pilgrim <pilgrim@xxxxxxxxx> wrote:
> Not to be flippant, but we have one that's widely available.  It's
> called the Expires header. 

You need the information outside of HTTP. To quote from the RSS spec
for ttl:

  This makes it possible for RSS sources to be managed by a file-sharing 
  network such as Gnutella. 

Caching information is about knowing when your client cache is stale,
regardless of how you got the feed.

Walter Underwood
Principal Architect, Verity