- From: Graham Klyne <GK@ninebynine.org>
- Date: Tue, 09 Dec 2003 10:04:02 +0000
- To: pat hayes <phayes@ihmc.us>, Ossi Nykänen <onykane@butler.cc.tut.fi>
- Cc: www-rdf-comments@w3.org
At 09:51 08/12/03 -0600, pat hayes wrote: >>In addition, suppose I'm asserting the following: >> >><#pat> <#child> [ <#age> "4" ] , [ <#age> "3" ]. > >? What does that mean? That the age is either 3 or 4? There is no way to >exactly model this in RDFS, though an ALT container would probably do as a >pragmatic device. Conforming RDF engines are not obliged to follow the >intended semantics of ALT, however. (It is quite tricky to implement; >disjunctions raise the complexity level of inference to new heights.) FWIW, that Notation3 expands out as this: <#pat> <#child> _:a . <#pat> <#child> _:b . _:a <#age> "4" . _:b <#age> "3" . So no ALTS there, just two children. #g ------------ Graham Klyne For email: http://www.ninebynine.org/#Contact
Received on Tuesday, 9 December 2003 07:14:07 UTC