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

From: Paolo Missier <Paolo.Missier@ncl.ac.uk>
Date: Tue, 08 Nov 2011 09:28:26 +0100
Message-ID: <4EB8E82A.1010105@ncl.ac.uk>
To: public-prov-wg@w3.org
Luc, Jim

I think Luc is formally right but again, to anyone wearing SW glasses, the examples /look like/ RFD Literals.
So I suggest to state in the section that Typed Literals in DM are expressed using a combination of a string and datatype iri. And 
state explicitly that this follows RDF convention but are not to be confused with RDF literals. and give the counter example:
   "http://example.org/foo"^^rdf:resource
as a valid Literal

--Paolo


On 11/8/11 8:44 AM, Luc Moreau wrote:
> You are mixing concrete syntax and abstract syntax. All typed literals in prov-dm have a string and a datatype iri.  It also applies to int, float, etc for which there is no syntactic sugar either in the ASN.  Why should we make a distinction for resources?
>
> Professor Luc Moreau
> Electronics and Computer Science
> University of Southampton
> Southampton SO17 1BJ
> United Kingdom
>
> On 8 Nov 2011, at 06:40, "Jim McCusker"<mccusj@rpi.edu>  wrote:
>
>> If you're going to directly reference RDF Resource, just use the
>> accepted syntax for it (like you did with the other literals), which
>> is what I used.
>>
>> Jim
>>
>> On Tue, Nov 8, 2011 at 1:25 AM, Luc Moreau<L.Moreau@ecs.soton.ac.uk>  wrote:
>>> It seems that you want to write
>>> "http://example.org/foo"^^rdf:resource
>>> or similar.
>>>
>>>
>>> Professor Luc Moreau
>>> Electronics and Computer Science
>>> University of Southampton
>>> Southampton SO17 1BJ
>>> United Kingdom
>>>
>>> On 8 Nov 2011, at 00:27, "Jim McCusker"<mccusj@rpi.edu<mailto:mccusj@rpi.edu>>  wrote:
>>>
>>> These are syntactically RDF literals:
>>>
>>> "abc"
>>> "abc"@en
>>> "abc"^^xsd:string
>>> "1"^^xsd:int
>>> "http://example.org/foo"^^xsd:anyURI
>>>
>>> Maybe they're also PROV-DM literals, but then you should support the
>>> following URI "literals":
>>>
>>> <http://example.org>
>>>
>>> Jim
>>>
>>> On Mon, Nov 7, 2011 at 6:38 PM, Luc Moreau<L.Moreau@ecs.soton.ac.uk<mailto:L.Moreau@ecs.soton.ac.uk>>  wrote:
>>> No Jim, they are prov-dm literals, "leaves" as you said.
>>> I thought you would map a prov-dm URi literal into an rdf resource.
>>>
>>> Professor Luc Moreau
>>> Electronics and Computer Science
>>> University of Southampton
>>> Southampton SO17 1BJ
>>> United Kingdom
>>>
>>> On 7 Nov 2011, at 23:35, "Jim McCusker"<mccusj@rpi.edu<mailto:mccusj@rpi.edu>>  wrote:
>>>
>>> The examples are all RDF literals. I thought that we weren't using any
>>> RDF in the DM...
>>>
>>> Jim
>>>
>>> On Mon, Nov 7, 2011 at 5:19 PM, Luc Moreau<L.Moreau@ecs.soton.ac.uk<mailto:L.Moreau@ecs.soton.ac.uk>>  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<mailto: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
>>>
>>>
>>>
>>>
>>>
Received on Tuesday, 8 November 2011 08:28:52 UTC

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