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Re: PROV-ISSUE-193: Section (PROV-DM as on Nov 28) [prov-dm]

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Thu, 08 Dec 2011 10:04:39 +0000
Message-ID: <EMEW3|4c481d34782658aa4224ca40701aee26nB7A4g08L.Moreau|ecs.soton.ac.uk|4EE08BB7.3040302@ecs.soton.ac.uk>
To: public-prov-wg@w3.org
Hi Satya,

On 12/07/2011 02:09 AM, Provenance Working Group Issue Tracker wrote:
> PROV-ISSUE-193: Section (PROV-DM as on Nov 28)  [prov-dm]
> http://www.w3.org/2011/prov/track/issues/193
> Raised by: Satya Sahoo
> On product: prov-dm
> Hi,
> The following are my comments for Section of the PROV-DM (as on Nov 28):
> Start and End Records
> 1. A start record is a representation of an agent starting an activity. An end record is a representation of an agent ending an activity.
> Comment: The names of these records should explicitly include "Activity", since on their own a "start" and "end" record may mean start of an event also?

Of course we can change the name, but I don't see what confusion there 
is.  Where did we mention start of an event?
This is not really meaningful in this context.

> It is not clear why the WG should create "start" and "end" records for agent starting and ending an activity. What about "pausing", "re-starting", "increasing rate of an activity" (e.g. experiment rate was increased by addition of reagent by researcher) to name a few association types between activity and agent?

Ultimately, underpinning prov-dm is a notion of interval, for entities 
and for activities.
I think it's important for prov-dm to have construct to explain what 
brings them about. Hence the requirement for starting/ending activities.

There is nothing in the model related to paused/unpause state, activity 
rate, etc. They can be introduced with application specific attributes,
and specialisation of wasAssociatedWith.

> Thanks.
> Best,
> Satya


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 Thursday, 8 December 2011 10:05:16 UTC

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