- From: <gstoil@image.ece.ntua.gr>
- Date: Thu, 8 Nov 2007 13:20:11 -0000
- To: Carsten Lutz <clu@tcs.inf.tu-dresden.de>, gstoil@image.ece.ntua.gr
- Cc: Boris Motik <boris.motik@comlab.ox.ac.uk>, public-owl-wg@w3.org
Carsten Lutz <clu@tcs.inf.tu-dresden.de> said: > > On Thu, 8 Nov 2007, gstoil@image.ece.ntua.gr wrote: > > > > Carsten Lutz <clu@tcs.inf.tu-dresden.de> said: > > > >> relation. Actually, we could think of adding the universal property > >> and interpreting the anonymous individuals as skolem constants, as you > >> propose. This means that, if really needed, true anonymous individuals > >> can still be recovered via the universal property. The restriction to > >> tree-shaped interconnections is then automatic. And we don't introduce > >> conjunctive queries to ontology entailment. > >> > >> greetings, > >> > >> Carsten > > > > But is there currently any reasoning support for the universal role in SROIQ? > > I believe there isn't any. > > Yes, it is in SROIQ. But even if it wasn't: it's useful, it's easily added > to tableau algorithm, and it shouldn't be difficult to implement. > > greetings, > Carsten > But from the paper of SROIQ I am reading the following: Def 2: "A RIA ... not including the universal role" Def 3: "For roles R,S != U..." Def 15: "...let C_o be a SROIQ-concept not using the universal role..." Am I missing something? Cheers, G. Stoilos > -- > * Carsten Lutz, Institut f"ur Theoretische Informatik, TU Dresden * > * Office phone:++49 351 46339171 mailto:lutz@tcs.inf.tu-dresden.de * > --
Received on Thursday, 8 November 2007 13:20:48 UTC