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Re: HTTP Extension draft

From: Henrik Frystyk Nielsen <frystyk@w3.org>
Date: Wed, 06 Jan 1999 15:20:18 -0500
Message-Id: <>
To: Rob Lanphier <robla@real.com>, discuss@apps.ietf.org
At 09:50 1/6/99 -0800, Rob Lanphier wrote:

>I can see the benefits of trying to extend the XML model to HTTP.  However,
>I'd like to see how things pan out with XML namespaces before retrofitting
>that model into HTTP.

Actually, the HTTP extension framework namespace model has been there for
quite some time - remember that the basic idea of this proposal goes back a

>A side question:  if this becomes a proposed recommendation, what do you
>think will be the first application that uses this?  I ask this because I'm
>wondering if there's something waiting in the wings for the completion of
>this spec, and to get a good feel for a good application of this.

There are several applications that are waiting/potential candidates for
HTTP extensions (no endorsement from my side on whether these extensions
are good or not).

* Integrating TIP in HTTP - Yaron wrote up a draft some time ago regarding
this. It has expired now but you can find it at [3].

* The W3C P3P [1] intends to use it for sending privacy agreements over the

* The work going on in the conneg area with respect to CCPP [2]

* The WIRE draft [4] (although a highly revised version is soon to be sent
out this is still valid), which is a mechanism for exchanging generic
metadata in HTTP

* Negotiating new transport filters like TLS, compression, etc. would be an
obvious use of the extension framework. Rohit wrote a draft on how to use
the upgrade header but the extension framework is really a superset of the
upgrade header. [5]

And then of course there is Larry Masinter's infamous HTCPCP [6].

I am aware of others but will leave it to the extension designers to
announce this. This has nothing to do with W3C work, it's just that I don't
know how and when they prefer to announce their work.


[1] http://www.w3.org/P3P/
[2] http://www.w3.org/TR/NOTE-CCPP/
[3] http://www.ics.uci.edu/pub/ietf/http/draft-ietf-tip-usehttp-01.txt
[4] http://www.ics.uci.edu/pub/ietf/http/draft-girod-w3-id-res-ext-00.txt
[5] http://www.ics.uci.edu/pub/ietf/http/draft-ietf-tls-http-upgrade-00.txt
[6] http://info.internet.isi.edu:80/in-notes/rfc/files/rfc2324.txt
Henrik Frystyk Nielsen,
World Wide Web Consortium
Received on Wednesday, 6 January 1999 15:20:59 UTC

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