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

From: (wrong st <joshrcohen@hotmail.com>
Date: Wed, 29 Aug 2001 12:25:49 -0700
To: deltav@wegalink.de, ietf-dav-versioning@w3.org
Message-ID: <LAW2-F112iufL0xJdQd0000839d@hotmail.com>
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 Wednesday, 29 August 2001 15:26:35 GMT

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