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Re: PROV-ISSUE-222 (used-objectproperty): Datatype property for used? [Ontology]

From: Timothy Lebo <lebot@rpi.edu>
Date: Mon, 16 Apr 2012 11:35:29 -0400
Cc: public-prov-wg@w3.org
Message-Id: <8FB8C5EC-C97E-4383-A7BC-FEA2AB9A0FDF@rpi.edu>
To: Luc Moreau <L.Moreau@ecs.soton.ac.uk>

On Apr 16, 2012, at 10:49 AM, Luc Moreau wrote:

> Hi Tim,
> 
> Just a word to say that it's a problem that is not specific to the ontology.
> The problem is similar in other serializations.
> Should we have a statement about this in the dm?

That makes sense. Would you life to reserve prov:value?
PROV-O will not define prov:value in favor of rdf:value.
I think the rest of the PROV-O solution (content in RDF vocab) would fall outside of DM's control, as we've done before.

-Tim

> Luc
> 
> On 04/16/2012 02:18 PM, Timothy Lebo wrote:
>> Paul (and Graham),
>> 
>> The prov-o team discussed this last week and agreed that this topic is more appropriate in the best practices document.
>> We also outlined the recommended patterns.
>> 
>> I put a stub entry at
>> 
>> http://dvcs.w3.org/hg/prov/raw-file/1a7d883e143e/bestpractices/BestPractices.html#using-strings
>> 
>> that says:
>> 
>> * If you want to break RL and any tools built around PROV-O, just use a string.
>> * If you want to follow the datatype/objectproperty distinction, use a resource with rdf:value OR
>> * use content in rdf http://www.w3.org/TR/Content-in-RDF10/
>> 
>> 1)
>> Can we move this issue to the best practices product?
>> http://www.w3.org/2011/prov/track/products/7
>> 
>> 2)
>> Can you put a "string-heavy" example into http://www.w3.org/2011/prov/wiki/PROV_examples to motivate further development of the best practice?
>> 
>> 3)
>> Can we close ISSUE-248 http://www.w3.org/2011/prov/track/issues/248 as a duplicate of this issue?
>> 
>> 
>> On Jan 19, 2012, at 4:36 AM, Graham Klyne wrote:
>> 
>>   
>>> Paul,
>>> 
>>> This problem is, IMO, an atifact of the arguably arbitrary restrictions of description logic and OWL-DL.  If you don't need to be consrainted to OWL-DL then the problem does not arise.  Just saying.
>>>     
>> The problem does arise practically, too. If the range of prov:used is a rdfs:Resource, then tools will handle it as such (and not a string).
>> So tools will choke while reading your account, even if they don't care about reasoning.
>> 
>> 
>>   
>>> Staying with the object/datatype property distinction, I think either of your suggested approaches can work, but I don't know about semantics of entity here - it seems to me that it should be possoible to formulate the semantics around two properties as well as one, even if the formulation is more complex.
>>>     
>> 
>>   
>>> The second approach avoids the semantic uncertainties at the costof some added complexity in RDF representation.
>>>     
>> 
>> @Graham, could you elaborate this approach, so that we can articulate it in the best practices document?
>> 
>> Thanks,
>> Tim
>> 
>> 
>> 
>>   
>>> I'm not sure this helps :(
>>> 
>>> #g
>>> --
>>> 
>>> On 18/01/2012 09:40, Provenance Working Group Issue Tracker wrote:
>>>     
>>>> PROV-ISSUE-222 (used-objectproperty): Datatype property for used? [Ontology]
>>>> 
>>>> http://www.w3.org/2011/prov/track/issues/222
>>>> 
>>>> Raised by: Paul Groth
>>>> On product: Ontology
>>>> 
>>>> Currently, prov-o:used is defined as an objectproperty. This is fine. However, we've be doing some modeling here at the VU where the parameter to a program is a string. Currently, this is not modelled using a prov-o:used edge but it seems like it should be. Is there anyway we can support this?
>>>> 
>>>> My first inclination is to define a corresponding datatype property but this make break the semantics of entity...
>>>> 
>>>> Another option might be to suggest using a blank node with the string attached using an application specific predicate.
>>>> 
>>>> Suggestions?
>>>> 
>>>> 
>>>> 
>>>> 
>>>>       
>>> 
>>>     
>> 
>>   
> 
> -- 
> 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 Monday, 16 April 2012 15:36:05 GMT

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