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Re: HTTP Caching Model?

From: Ari Luotonen <luotonen@neon.mcom.com>
Date: Thu, 15 Dec 1994 18:58:45 -0800 (PST)
Message-Id: <199412160258.SAA19812@neon.mcom.com>
To: "Daniel W. Connolly" <connolly@hal.com>
Cc: fielding@avron.ICS.UCI.EDU, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com

> The only thing that it _must_ do is issue _some_ URI: header with 
> a vary parameter if it's got variants. That's enough to prevent
> proxies from jumping to conclusions.

Ok, very good.

> If the server gives an Expires: header, the proxy can conclude that
> the variants are stable until then.

Not necessarily -- take a Stephen King book "Killer Web".  It's first
published in English and put online.  It's static data and practically
never expires.  A month later they publish it in Finnish, and a month
after that in French.  This still shouldn't impose that the English
version expires once a month.  And you can't know of the translation
schedules beforehand in the first place anyway.

Ok, so King probably would make this interactive book in which the
plot changes as a function of time, number of people killed, and
whether IT really died in part two...

Ari Luotonen				http://home.mcom.com/people/ari/
Netscape Communications Corp.
650 Castro Street, Suite 500
Mountain View, CA 94041, USA
Received on Thursday, 15 December 1994 18:59:02 UTC

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