Re: PROV-ISSUE-142 (Tlebo): Can roles only be Literals? [Data Model]

Updated section is now available. What do you think?

I feel that we need to be able to express "blobs" in xml/rdf/json for 
instance.
We need to be able to extend the grammar for these.

Luc

On 11/08/2011 08:34 AM, Paolo Missier wrote:
> Hi,
>
> I'm not so sure the new text is crisp enough ("leaf" is too informal?):
>
> < A PROV-DM Literal is a "leaf" value, since it does not refer to any 
> other PROV-DM construct. Among the PROV-DM Literals, we find URIs 
> allowing outgoing relations to resources outside the scope of PROV-DM.
>
> > A PROV-DM Literal is a value whose intepretation is outside the 
> scope of PROV-DM. In particular, a Literal may be a URI-typed string, 
> but such URI has no specific interpretation in the context of PROV-DM.
>
> What do you think
>
> -Paolo
>
>
>
> On 11/7/11 11:19 PM, Luc Moreau wrote:
>> Hi Tim, Stephan, Jim,
>>
>> Here is a first draft of the literal section.
>>
>> http://dvcs.w3.org/hg/prov/raw-file/default/model/ProvenanceModel.html#record-literal
>>
>> It would be good to have your feedback.
>> If you find it's ok, than the literals examples in the document need to
>> be checked.
>>
>> Cheers,
>> Luc
>>
>> On 07/11/11 18:15, Jim McCusker wrote:
>>      
>>> On Mon, Nov 7, 2011 at 12:42 PM, Paolo Missier<Paolo.Missier@ncl.ac.uk>   wrote:
>>>
>>>        
>>>> DM says:
>>>>
>>>> 5.5.5 Literal
>>>>
>>>> Literals represent data values such as particular string or integers.
>>>>
>>>> My understanding is it's always been used in the standard grammar production
>>>> meaning (eg:http://savage.net.au/SQL/sql-2003-2.bnf.html#literal). Not so?
>>>>
>>>>          
>>> I think a clearer definition would be:
>>>
>>> A Provenance Literal is a "leaf" value. It does not explicitly have
>>> any outgoing relations (in SW-ish: Is not a subject of any statement)
>>> in the PROV data model. Any outgoing relations from a Provenance
>>> Literal is out of scope for the PROV DM.
>>>
>>> Jim
>>>
>>>        
>
>
> -- 
> -----------  ~oo~  --------------
> Paolo Missier -Paolo.Missier@newcastle.ac.uk,pmissier@acm.org
> School of Computing Science, Newcastle University,  UK
> http://www.cs.ncl.ac.uk/people/Paolo.Missier
>    

-- 
Professor Luc Moreau
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University of Southampton          fax:   +44 23 8059 2865
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