- From: Michael Schneider <schneid@fzi.de>
- Date: Mon, 22 Sep 2008 14:48:13 +0200
- To: "Sandro Hawke" <sandro@w3.org>, "Uli Sattler" <sattler@cs.man.ac.uk>
- Cc: "Ivan Herman" <ivan@w3.org>, "Bijan Parsia" <bparsia@cs.man.ac.uk>, <public-owl-wg@w3.org>
- Message-ID: <0EF30CAA69519C4CB91D01481AEA06A0B990FA@judith.fzi.de>
Sandro Hawke wrote: >> On 19 Sep 2008, at 16:29, Ivan Herman wrote: >> >> > Ah! So the remark could be translated as 'there is nothing DL >specific >> > in it'. Right? This makes sense... >> > >> >> indeed, this is what I tried to say, cheers, Uli > >I'm baffled by this. > >I'm pretty sure they are not the semantics of full first-order logic. Good point! The OWL 2 (DL) Semantics actually only provides interpretation rules (FIXME: is this an appropriate term? There is AFAICT no name for the entries in the different tables.) for expressions being allowed by the (functional) syntax of OWL 2 DL. >And they are the semantics of OWL DL, which I understand is a >description logic (DL) language. (As the W3C Recommendation on the >subject says, "OWL DL is so named due to its correspondence with >description logics".) > >So that makes them very DL specific. Agreed. FYI, the intro of the "Semantics" document states [1]: """ The semantics given here is strongly related to the semantics of description logics [Description Logics] and is compatible with the semantics of the description logic SROIQ [SROIQ]. """ [...] >I note that the phrase "DL Semantics" is often used in our meetings I always use this particular term, because it's easy to speak, and it's meaning is generally obvious to the people. I would never say "Semantics", "Model-Theoretic Semantics", "First Order Semantics", or "Primary Semantics", because I would expect that the people, to who I am talking, would ask me for clarification about what I am talking about. I would rarely say "the Semantics of OWL 2 DL and EL and QL", because I regard this, while being very distinctive, also to be very clumsy. Of course, I also rarely say "RDF Based Semantics", but "OWL (2) Full Semantics" instead. Cheers, Michael [1] <http://www.w3.org/2007/OWL/wiki/Semantics#Introduction> -- Dipl.-Inform. Michael Schneider FZI Forschungszentrum Informatik Karlsruhe Abtl. Information Process Engineering (IPE) Tel : +49-721-9654-726 Fax : +49-721-9654-727 Email: Michael.Schneider@fzi.de Web : http://www.fzi.de/ipe/eng/mitarbeiter.php?id=555 FZI Forschungszentrum Informatik an der Universität Karlsruhe Haid-und-Neu-Str. 10-14, D-76131 Karlsruhe Tel.: +49-721-9654-0, Fax: +49-721-9654-959 Stiftung des bürgerlichen Rechts Az: 14-0563.1 Regierungspräsidium Karlsruhe Vorstand: Rüdiger Dillmann, Michael Flor, Jivka Ovtcharova, Rudi Studer Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
Received on Monday, 22 September 2008 12:58:51 UTC