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Re: PROV-ISSUE-522: Data Model Section 5.3.4 [prov-dm]

From: Khalid Belhajjame <Khalid.Belhajjame@cs.man.ac.uk>
Date: Wed, 3 Oct 2012 13:31:46 +0100
Message-ID: <CAANah+E=2U-KLwbpZyP_7hsvVpydXJ4POqzWyKUeELCEWC-y2w@mail.gmail.com>
To: Luc Moreau <l.moreau@ecs.soton.ac.uk>
Cc: public-prov-wg@w3.org
In the response to this issue, it is said that "If in an application,
it is necessary to express that a delegation takes place over an
interval(evt1-evt2) and followed by a delegation during interval
(evt2-evt3), the approach is to model this with two activities, one
for the first interval, or one for the second interval, and two
relations actedOnBehalfOf, one for each activity."

I think this is too strong, it implies that the design "Plan" and
composition of activities will be driven by the interval of time
people are available to perfom the activities, as opposed to the task
carried out by activities. I would, therefore, opt for removing the
above statement from the response.

Regards, khalid

On 25 September 2012 14:43, Luc Moreau <l.moreau@ecs.soton.ac.uk> wrote:
> Dear all,
>
> Here is a draft response for issue-522,
> http://www.w3.org/2011/prov/wiki/ResponsesToPublicComments#ISSUE-522_.28Activity_Delegation.29
>
> Feedback appreciated.
> Regards
> Luc
>
> ISSUE-522 (Activity Delegation)
>
> Original email:
> http://lists.w3.org/Archives/Public/public-prov-wg/2012Sep/0112.html
> Tracker: http://www.w3.org/2011/prov/track/issues/522
> Group Response
>
> Our response to ISSUE-521 partly addresses this issue.
> PROV delegations are not temporal relations. Instead, prov-constraints
> define ordering constraints that are implied by delegations: the responsible
> agent has to precede or has some overlap with the subordinate agent.
> If in an application, it is necessary to express that a delegation takes
> place over an interval(evt1-evt2) and followed by a delegation during
> interval (evt2-evt3), the approach is to model this with two activities, one
> for the first interval, or one for the second interval, and two relations
> actedOnBehalfOf, one for each activity.
>
> References:
>
> Delegation ordering constraints:
> http://www.w3.org/TR/2012/WD-prov-constraints-20120911/#actedOnBehalfOf-ordering
> Issue raised against prov-constraints:
> https://www.w3.org/2011/prov/track/issues/559
>
> Changes to the document: none, but issue raised against prov-constraints
> Original author's acknowledgement:
>
> [edit]
>
>
>
> On 10/09/2012 09:49, Provenance Working Group Issue Tracker wrote:
>
> PROV-ISSUE-522: Data Model Section 5.3.4   [prov-dm]
>
> http://www.w3.org/2011/prov/track/issues/522
>
> Raised by: Luc Moreau
> On product: prov-dm
>
>
> http://www.w3.org/2011/prov/wiki/LC_Feedback#Data_Model_Section_5.3.4
>
>
> ISSUE-463
>
>
> See comments for section 5.3.3. Can activities delegate to other agents, or
> can only entity agents delegate to other entities? (I assume the intent is
> to restrict delegation to only entity agents.)
>
> Delegations are only valid for a given window of time, so start and end
> times should be added.
>
>
>
>
>
>
>
> --
> Professor Luc Moreau
> Electronics and Computer Science   tel:   +44 23 8059 4487
> University of Southampton          fax:   +44 23 8059 2865
> Southampton SO17 1BJ               email: l.moreau@ecs.soton.ac.uk
> United Kingdom                     http://www.ecs.soton.ac.uk/~lavm
>
Received on Wednesday, 3 October 2012 12:32:14 UTC

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