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Re: PROV-ISSUE-521: Data Model Section 5.3.3 [prov-dm]

From: Paul Groth <p.t.groth@vu.nl>
Date: Wed, 26 Sep 2012 15:20:14 +0200
Message-ID: <CAJCyKRo-DHhSp3EWNCDs9yxcKtmgF76-gTgX-A_pZKz=1Bj4EA@mail.gmail.com>
To: Luc Moreau <l.moreau@ecs.soton.ac.uk>
Cc: "public-prov-wg@w3.org" <public-prov-wg@w3.org>
Hi Luc,

I get the response.... but there's a suggested modelling approach,
namely, break down the activity into two activity, suggests that then
you have subactivites..... Akkkk

cheers
Paul

On Tue, Sep 25, 2012 at 3:27 PM, Luc Moreau <l.moreau@ecs.soton.ac.uk> wrote:
>
> Hi all,
>
> Find below a draft response to this issue, available on the wiki at:
> http://www.w3.org/2011/prov/wiki/ResponsesToPublicComments#ISSUE-521_.28Responsibility_Activity.29
>
> Feedback appreciated,
> Regards,
> Luc
>
> ISSUE-521 (Responsibility Activity)
>
> Original email:
> http://lists.w3.org/Archives/Public/public-prov-wg/2012Sep/0111.html
> Tracker: http://www.w3.org/2011/prov/track/issues/521
> Group Response
>
> PROV agents bear responsibility for activities taking place, entities being
> generated, and other agents.
> PROV agents MAY be entities or activities
> Given this, it is legal to write the following, in which the type of a2 and
> a1 is inferred to be agent.
>
> activity(a1)
> activity(a2)
> actedOnBehalfOf(a2,a1)
>
> The group has provided its answer to ISSUE-503
> PROV associations are not temporal relations. Instead, prov-constraints
> define ordering constraints that are implied by associations. The agent in
> an association is expected to have some overlap with the activity. Likewise,
> for attribution, the agent exist before this entity was generated.
> If an application, it is necessary to express that an activity is associated
> with agent ag1 during interval (evt1-evt2) and then with agent ag2 during
> interval (evt2-evt3), the approach is to model this with two activities, one
> for the first interval, or one for the second interval.
>
> References:
>
> Type inference:
> http://www.w3.org/TR/2012/WD-prov-constraints-20120911/#typing
> Adopt plan response:
> http://www.w3.org/2011/prov/wiki/ResponsesToPublicComments#ISSUE-503_.28adopt_plan.29
> Association ordering constraints:
> http://www.w3.org/TR/2012/WD-prov-constraints-20120911/#wasAssociatedWith-ordering_text
>
> Changes to the document: http://dvcs.w3.org/hg/prov/rev/e89828e2a81c
> Original author's acknowledgement:
>
>
>
> On 10/09/2012 09:48, Provenance Working Group Issue Tracker wrote:
>
> PROV-ISSUE-521: Data Model Section 5.3.3   [prov-dm]
>
> http://www.w3.org/2011/prov/track/issues/521
>
> Raised by: Luc Moreau
> On product: prov-dm
>
>
> http://www.w3.org/2011/prov/wiki/LC_Feedback#Data_Model_Section_5.3.3
>
> ISSUE-463
>
> By definition, agents can be both entities and activities (section 2.1.3).
> Can activities be responsible for other activities, or can only entities be
> assigned responsibility?
>
> Similarly, can activities adopt a plan when acting as an agent, or can only
> entity agents adopt plans?
>
> Can associations be valid for a window of time for a given activity? For
> example, several agents are responsible for the activity of preparing and
> serving food in a restaurant (server, cook, bartender), but not all of them
> are responsible for the entire time the activity is active. To support this,
> start and end times should be added to Associations.
>
>
>
>
>
>
>
> --
> 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
>



-- 
--
Dr. Paul Groth (p.t.groth@vu.nl)
http://www.few.vu.nl/~pgroth/
Assistant Professor
- Knowledge Representation & Reasoning Group |
  Artificial Intelligence Section | Department of Computer Science
- The Network Institute
VU University Amsterdam
Received on Wednesday, 26 September 2012 13:20:45 GMT

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