- From: Michael Schneider <schneid@fzi.de>
- Date: Tue, 23 Nov 2010 17:51:14 +0100
- To: "Cristian Cocos" <cristi@ieee.org>
- Cc: <public-owl-dev@w3.org>
Cristian Cocos wrote: >1. Anybody care to tell me if OWL 2 EL and RL are syntactic fragments >of OWL 2 DL please? Yes. But do not confuse the OWL 2 RL syntactic profile (which in fact is a syntactic fragment of OWL 2 DL) with the OWL 2 RL/RDF rules, which is a /semantic/ fragment of OWL 2 /Full/, and is defined for unrestricted RDF graphs. [snip] >2. I need to explain very briefly the syntactic difference b/w OWL 2 >Full and OWL 2 DL--is there such a thing as "the most >important/glaring difference" between the two? The syntax of OWL 2 Full is the RDF abstract syntax [1], i.e. any RDF graph is a valid OWL 2 Full ontology. To compare this with OWL 2 DL, one should think in terms of "OWL 2 DL ontologies in RDF graph form". An RDF graph is an OWL 2 DL ontology in RDF graph form, if it (a) can be successfully mapped by the reverse OWL 2 RDF Mapping [2] and (b) if the resulting ontology in the OWL 2 Structural Specification meets the restrictions on OWL 2 DL ontologies as summarized at the beginning of Chap. 3 of [3]. In other words, whenever this two-step checking fails for some given RDF graph, then you have an example for an OWL 2 Full ontology that is not an OWL 2 DL ontology (in RDF graph form). >Many thanks, > >C Best, Michael [1] <http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/> [2] <http://www.w3.org/TR/2009/REC-owl2-mapping-to-rdf-20091027/> [3] <http://www.w3.org/TR/2009/REC-owl2-syntax-20091027/> -- Dipl.-Inform. Michael Schneider Research Scientist, Information Process Engineering (IPE) Tel : +49-721-9654-726 Fax : +49-721-9654-727 Email: michael.schneider@fzi.de WWW : http://www.fzi.de/michael.schneider ======================================================================= 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, RP Karlsruhe Vorstand: Prof. Dr.-Ing. Rüdiger Dillmann, Dipl. Wi.-Ing. Michael Flor, Prof. Dr. Dr. h.c. Wolffried Stucky, Prof. Dr. Rudi Studer Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus =======================================================================
Received on Tuesday, 23 November 2010 16:51:53 UTC