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RE: WebDAV Invalidation (Was Re: Allow: header and supported methods)

From: Jim Amsden <jamsden@us.ibm.com>
Date: Thu, 6 Sep 2001 20:40:25 -0400
To: w3c-dist-auth@w3c.org, ietf-dav-versioning@w3.org
Message-ID: <OF8A5FFCA9.1F92738A-ON85256AC0.000302E3@raleigh.ibm.com>
I'll schedule a BOF at the next IETF meeting. If there's enough interest, 
we can create a proposed charter and petition the area directors for a new 
working group.






"Lisa Dusseault" <lisa@xythos.com>
Sent by: ietf-dav-versioning-request@w3.org
09/06/2001 06:21 PM

 
        To:     =?iso-8859-1?Q?J=F6sh_Cohen?= <joshrcohen@hotmail.com>, 
<deltav@wegalink.de>, <ietf-dav-versioning@w3.org>
        cc:     "Webdav WG" <w3c-dist-auth@w3c.org>
        Subject:        RE: WebDAV Invalidation (Was Re: Allow: header and supported methods)

 

I'd definitely be interested in working on notifications.  We'd like 
clients
to be able to know about events like the ones you suggest, plus:
 - new resource in collection I'm subscribed to
 - Access control change in resource I'm subscribed to
 - New version in VCR (similar to your update/last-modified event, perhaps
equivalent)

How do we proceed?

lisa

> -----Original Message-----
> From: ietf-dav-versioning-request@w3.org
> [mailto:ietf-dav-versioning-request@w3.org]On Behalf Of Jösh Cohen
> Sent: Wednesday, August 29, 2001 12:26 PM
> To: deltav@wegalink.de; ietf-dav-versioning@w3.org
> Subject: Re: WebDAV Invalidation (Was Re: Allow: header and supported
> methods)
>
>
> While Im nervous about trying to boil the ocean
> in the form of a 'general notifications protocol', Im
> wondering what people think about including the ability
> to subscribe to events on resources?
> By this I mean, in short, being able to subscribe
> to a resource, such that when things happen to it,
> such as:
> o  property change
> o  update (last modified)
> o  invalidate
> o  lock expiration / lock override
> o  deleted
>
> a subscribed entity would receive a notification.
>
> There's been some relevant work here in the form of
> an HTTP extension (SUBSCRIBE/NOTIFY methods) in the past
> to deal with some of these issues.  It was work that
> was previously done in the context of using HTTP for IM
> and it quite similar to the SIP subscription extensions.
>
> Does this sound at all like something the group
> would be interested in taking a closer look at ?
>
> thanks,
>
> ---
> Josh
>
>
>
> >From: "Eckhard Kantz" <deltav@wegalink.de>
> >To: <ietf-dav-versioning@w3.org>
> >Subject: Re: WebDAV Invalidation (Was Re: Allow: header and supported
> >methods)
> >Date: Wed, 22 Aug 2001 21:40:39 +0200
> >
> >The protocol described in the ESI document allows to invalidate
> documents
> >that have been downloaded
> >to a local machine by applying a push technology. This could
> solve already
> >several conflict
> >situations or even partly prevent problems.
> >
> >On the other hand there seems to be an increasing need for more
> >fine-grained notification services
> >that extend the traditional access control systems. Picture 1 in the
> >following longer article tries
> >to classify them:
> >
> >"Beyond 'Yes or No' - Extending Access Control in Groupware with
> >Negotiation and Awareness"
> >(http://www.informatik.uni-bonn.de/~os/Publications/COOP98a.ps)
> >
> >Maybe those needs are also worth discussing if they could be
> supported in
> >the spec in order to allow
> >applications to build up on them. The invalidation protocol
> seems to be a
> >good basis also for this.
> >
> >Eckhard
> >
> >
> >-----Ursprüngliche Nachricht-----
> >Von: Eric Sedlar
> >An: ietf-dav-versioning@w3.org
> >Gesendet: Dienstag, 21. August 2001 19:00
> >Betreff: WebDAV Invalidation (Was Re: Allow: header and
> supported methods)
> >
> >
> >Check out
> >http://www.esi.org/invalidation_protocol_1-0.html for some work
> that looks
> >pretty similar
> >to what we are talking about.
> >
> >--Eric
> >
>
>
> _________________________________________________________________
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Received on Thursday, 6 September 2001 20:40:31 GMT

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