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Re: PROV-ISSUE-311 (clarify-optionals): Clarify optional arguments in DM [prov-dm]

From: Luc Moreau <L.Moreau@ecs.soton.ac.uk>
Date: Wed, 18 Apr 2012 07:51:06 +0100
Message-ID: <EMEW3|210b27043a1ce23a2ebdbcf61f959c1co3H7p908L.Moreau|ecs.soton.ac.uk|4F8E645A.6000507@ecs.soton.ac.uk>
To: public-prov-wg@w3.org, Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
Hi Stian,
Can we close this issue now?
Regards,
Luc

On 04/02/2012 03:58 PM, Luc Moreau wrote:
> Hi Stian,
>
> If you follow [1] below, you will now find our proposed answer to 
> optional arguments.
> It contains explicit links to prov-dm part 2.
>
> I propose to close this issue pending your review.
> Regards,
> Luc
>
>
> On 03/30/2012 04:12 PM, Luc Moreau wrote:
>>
>> Hi Stian,
>>
>> I have been thinking about your suggestion on optional arguments.
>> I looked at all the optional arguments [1] in prov-dm.
>>
>> Most of them, I believe, imply  existential quantification.
>>
>> It would be nice to have this confirmed, and then we can write it up 
>> in part 2.
>>
>> Luc
>>
>> [1] http://dvcs.w3.org/hg/prov/raw-file/default/model/optional.html
>>
>> On 13/03/2012 11:05, Provenance Working Group Issue Tracker wrote:
>>> PROV-ISSUE-311 (clarify-optionals): Clarify optional arguments in DM 
>>> [prov-dm]
>>>
>>> http://www.w3.org/2011/prov/track/issues/311
>>>
>>> Raised by: Stian Soiland-Reyes
>>> On product: prov-dm
>>>
>>> There seems to be some confusion over any of the 'optional' 
>>> arguments in
>>> PROV-DM/PROV-N.
>>>
>>> It is unclear if this means that the argument is *implied* (ie.
>>> existential quantification/bnodes in OWL/RDF) or not applicable/not 
>>> present (NIL).
>>>
>>> It might be good to go through all of the optionals in PROV-DM and 
>>> make sure they make that clear.
>>>
>>> For instance:
>>>> Generation, written wasGeneratedBy(id,e,a,t,attrs) in PROV-N, has 
>>>> the following components:
>>>> id: an optional identifier for a generation;
>>>> entity: an identifier for a created entity;
>>>> activity: an optional identifier for the activity that creates the 
>>>> entity;
>>>> time: an optional "generation time", the time at which the entity 
>>>> was completely created;
>>>> attributes: an optional set of attribute-value pairs that describes 
>>>> the modalities of generation of this entity by this activity.
>>> Change to:
>>>
>>>
>>>> Generation, written wasGeneratedBy(id,e,a,t,attrs) in PROV-N, has 
>>>> the following components:
>>>> id: an optional identifier for a generation, if unspecified the 
>>>> identifier is not known;
>>>> entity: an identifier for a created entity;
>>>> activity: an optional identifier for the activity that creates the 
>>>> entity, if unspecified activity is still implied, but unknown;
>>>> time: an optional "generation time", the time at which the entity 
>>>> was completely created, if unspecified the time is unknown or not 
>>>> applicable;
>>>> attributes: an optional set of attribute-value pairs that describes 
>>>> the modalities of generation of this entity by this activity, if 
>>>> unspecified an empty set is implied.
>>>
>>>
>>>
>>
>

-- 
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, 18 April 2012 06:51:45 GMT

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