Re: Fwd:HTTP server driven content negotiation

From: Henrik Frystyk Nielsen (
Date: Mon, Mar 08 1999

Message-Id: <>
Date: Mon, 08 Mar 1999 09:44:09 -0500
To: Johan Hjelm <>, Philipp Hoschka <>,
From: Henrik Frystyk Nielsen <>
Subject: Re: Fwd:HTTP server driven content negotiation

At 15:11 3/8/99 +0100, Johan Hjelm wrote:

>>HTTP 1.1 has the Vary tag and the concept of server driven content
>>negotiation.  However, I found the use of the Vary tag somewhat vague.
>>Anyone have any experience with this tag?  Is there more info somewhere at
>>W3C on this - from the HTTP 1.1 author perhaps?

The vary header field is a mechanism for the origin server to tell a cache
what it used in the request to generate that particular response. As this
is not the case in a push situation, it really doesn't help that much.

Henrik Frystyk Nielsen,
World Wide Web Consortium