- From: Ian Horrocks <ian.horrocks@comlab.ox.ac.uk>
- Date: Tue, 27 Nov 2007 17:41:34 +0000
- To: Bijan Parsia <bparsia@cs.man.ac.uk>
- Cc: "OWL Working Group WG <public-owl-wg@w3.org>" <public-owl-wg@w3.org>
I believe that it was an error (compounded by me) to get involved in a discussion of modelling style, and suggest that we stop now! What we *should* be discussing is how we are going to resolve the issue of "excessive duplication of vocabulary". The suggestion from Boris [1] is that in OWL DL we *either* (1) type the usage of the vocabulary *or* (2) require a strict separation of the vocabulary (which allows for some reduction in vocabulary). If we opt for (2), then the requirement can of course be relaxed in OWL Full -- indeed this is how it currently works in OWL 1.0. Ian [1] http://lists.w3.org/Archives/Public/public-owl-wg/2007Nov/0417.html On 27 Nov 2007, at 17:12, Bijan Parsia wrote: > > On 27 Nov 2007, at 15:28, ewallace@cme.nist.gov wrote: > >> Ivan Herman wrote: >>> Well... I did meet one example. DCMI (the organization behind the >>> Dublin >>> Core metadata) is having problems exactly on that. They have an >>> abstract >>> model document[1] where they speak about 'value surrogate' that can >>> either be a literal or non-literal. When mapping this abstract >>> model to >>> RDF[2] they hit this problem (eg, is the value of a dcterm:subject >>> property a literal or not). >> >> I personally think that this example illustrates plain bad modelling >> practice. Can you point to some discussion of the motivations for >> this >> choice which might modify my view? > > Data/Object Punning might arise from *changes* in modelling, for > example, lifting from a weaker representation (RDF or a RDBMS) or a > legacy representation (e.g., Old Skool DC). > > While it might be bad modelling, I find it difficult to argue that > these situations shouldn't be expressible (e.g., as a transition > point between one style of representation and another). > > Cheers, > Bijan. >
Received on Tuesday, 27 November 2007 17:41:48 UTC