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

Hi Jim,
what was rejected is Roles being subclasses of Entities.
Roles can still be classes...

In your example, I would make "presidentRole" and instance
of class Role and then link it to the entity "Barack Obama".

Best,
Daniel

2011/11/6 Jim McCusker <mccusj@rpi.edu>

> Make Roles resources like Entities. Classes of Roles (Creator,
> Publisher, PrincipleInvestigator) are instantiated for each Entity. Of
> course, this is rather similar to what's been rejected (?), but is
> still the best choice, IMO. This would be, for instance, "Barack
> Obama's role as president", as opposed to "the role of president",
> which would be a class.
>
> Role could also be an extension of skos:Concept and allow you to
> express "the role of president" directly without custom instantiation.
>
> Jim
>
> On Sun, Nov 6, 2011 at 8:38 AM, Luc Moreau <L.Moreau@ecs.soton.ac.uk>
> wrote:
> > Ok, so, what's alternative suggestion ?
> >
> > Professor Luc Moreau
> > Electronics and Computer Science
> > University of Southampton
> > Southampton SO17 1BJ
> > United Kingdom
> >
> >
> > On 6 Nov 2011, at 12:59, "Jim McCusker" <mccusj@rpi.edu> wrote:
> >
> >> This is a misunderstanding of a URI literal versus URI resource. When
> >> a URI resource is used, it can link to that resource when it has
> >> assertions made about it. This is not possible or intended with URI
> >> literals.
> >>
> >> Jim
> >>
> >> On Sun, Nov 6, 2011 at 2:36 AM, Luc Moreau <L.Moreau@ecs.soton.ac.uk>
> wrote:
> >>> Hi Tim,
> >>>
> >>> But doesn't this include URIs by means of typed literals?
> >>>
> >>> Professor Luc Moreau
> >>> Electronics and Computer Science
> >>> University of Southampton
> >>> Southampton SO17 1BJ
> >>> United Kingdom
> >>>
> >>> On 6 Nov 2011, at 01:20, "Provenance Working Group Issue Tracker" <
> sysbot+tracker@w3.org> wrote:
> >>>
> >>>>
> >>>> PROV-ISSUE-142 (Tlebo): Can roles only be Literals? [Data Model]
> >>>>
> >>>> http://www.w3.org/2011/prov/track/issues/142
> >>>>
> >>>> Raised by: Timothy Lebo
> >>>> On product: Data Model
> >>>>
> >>>> prov-dm, 5.5.1 Qualifier:
> >>>>
> >>>> "The value associated with a role attribute must be conformant with
> Literal."
> >>>>
> >>>>
> >>>>
> >>>> Will this prevent PROV-O from using URIs to cite roles?
> >>>>
> >>>> Restricting roles to literals will be severely limiting for PROV-O
> and semantic web applications, since literals cannot be described or served
> as linked data, and thus consumers will be unable to determine more
> information about what the role means.
> >>>>
> >>>>
> >>>>
> >>>
> >>>
> >>>
> >>
> >>
> >>
> >> --
> >> Jim McCusker
> >> Programmer Analyst
> >> Krauthammer Lab, Pathology Informatics
> >> Yale School of Medicine
> >> james.mccusker@yale.edu | (203) 785-6330
> >> http://krauthammerlab.med.yale.edu
> >>
> >> PhD Student
> >> Tetherless World Constellation
> >> Rensselaer Polytechnic Institute
> >> mccusj@cs.rpi.edu
> >> http://tw.rpi.edu
> >
> >
>
>
>
> --
> Jim McCusker
> Programmer Analyst
> Krauthammer Lab, Pathology Informatics
> Yale School of Medicine
> james.mccusker@yale.edu | (203) 785-6330
> http://krauthammerlab.med.yale.edu
>
> PhD Student
> Tetherless World Constellation
> Rensselaer Polytechnic Institute
> mccusj@cs.rpi.edu
> http://tw.rpi.edu
>
>