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Re: etags in If: headers (was: 54th IETF Meeting Information, and RFC2518 open issues)

From: Yves Lafon <ylafon@w3.org>
Date: Thu, 25 Apr 2002 09:20:29 +0200 (MET DST)
To: Greg Stein <gstein@lyra.org>
cc: "Webdav WG (E-mail)" <w3c-dist-auth@w3c.org>
Message-ID: <Pine.GSO.4.44.0204250912270.6474-100000@tarantula.inria.fr>
On Wed, 24 Apr 2002, Greg Stein wrote:

> On Mon, Apr 22, 2002 at 06:53:34PM +0200, Stefan Eissing wrote:
> > Am Montag den, 22. April 2002, um 18:36, schrieb Lisa Dusseault:
> >...
> > If headers with ETags do not add any value to the protocol. For
> > GET rfc2616 already defines If-Match and friends. Since the ETag
> > only captures content changes (property changes have undefined
> > effect on ETags), IF headers for ETag lack a use case.
>
> An etag in an If: header can be used to assert that a file has been
> unchanged since you last fetched it. Specifically, that you still have the
> locktoken *or* (you lost it and) it is unchanged.

You can also see the following note on this subject:
http://www.w3.org/1999/04/Editing/
Thanks,

-- 
Yves Lafon - W3C
Received on Thursday, 25 April 2002 03:40:06 GMT

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