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

From: James Cheney <jcheney@inf.ed.ac.uk>
Date: Thu, 19 Apr 2012 00:33:16 +0100
Message-Id: <5BC7BBD7-14EA-4392-9465-BBB656CE7922@inf.ed.ac.uk>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>, Provenance Working Group <public-prov-wg@w3.org>, Stian Soiland-Reyes <soiland-reyes@cs.manchester.ac.uk>
OK, I've posted my thoughts on this, and a proposal, at:

http://www.w3.org/2011/prov/wiki/Optional_arguments

(Sorry this is a bit long, but I think it is worth being a little pedantic here).

I'd like to keep this open for discussion, but don't think it's a blocking issue.

--James

On Apr 18, 2012, at 10:43 AM, James Cheney wrote:

> Hi,
> 
> I have been working on the optional arguments in part 2, and I am still not sure what to write baed on what is in part 1 now.  I am trying to formulate a proposal to see if I am on the right track.  So I think this should be kept open for now (maybe it should be reassigned to prov-dm-constraints).
> 
> --James
> 
> 
> On Apr 18, 2012, at 7:51 AM, Luc Moreau wrote:
> 
>> 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
>> 
>> 
>> 
> 
> 
> -- 
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
> 
> 
> 


-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
Received on Wednesday, 18 April 2012 23:34:15 GMT

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