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RE: getlastmodified of collections

From: Julian Reschke <julian.reschke@gmx.de>
Date: Fri, 5 Sep 2003 23:52:25 +0200
To: "Nevermann, Dr., Peter" <Peter.Nevermann@softwareag.com>, <w3c-dist-auth@w3c.org>
Message-ID: <JIEGINCHMLABHJBIGKBCEEANIGAA.julian.reschke@gmx.de>

> From: w3c-dist-auth-request@w3.org [mailto:w3c-dist-auth-request@w3.org]On
> Behalf Of Nevermann, Dr., Peter
> Sent: Friday, September 05, 2003 6:19 PM
> To: 'w3c-dist-auth@w3c.org'
> Subject: DAV:getlastmodified of collections
> AFAIK, according to RFC2518, Section 13.7, the
> DAV:getlastmodified property
> is not required to be defined for collections, but a server MAY define it.
> Is that correct?

Actually, it's not really required at all. A server should provide a
DAV:getlastmodified property for any resource for which it actually would
also provide the last-modified header upon GET. So a collection may have
GETtable content (in which case DAV:getlastmodified should be present), and
then also a server may not even have the last-modified date for a plain
resource (for instance if it's clockless).

> Then, probably the bindings of the collection are to be considered part of
> the collection's state and it would make sense to set DAV:getlastmodified
> whenever the bindings change:

I agree although I have to point out that properties *also* are part of the
state of a collection, and the current consensus seems to be that the
last-modified date should not change when the content doesn't. So this is

> - BIND, UNBIND (the coll identified by the req-URI)
> - REBIND (the coll identified by the req-URI AND the 2nd involved coll)
> - PUT returning 201 (the containing collection)
> - MKCOL (the containing collection)
> - DELETE (the containing collection)
> - LOCK creating a lock-null resource (the containing collection)
> - VERSION-CONTROL on existing version (the containing workspace)


> Sorry for such a basic question, but I didn't find it in the specs.

No, it's good to ask these kinds of questions.


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Received on Friday, 5 September 2003 17:53:15 UTC

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