From: Lassila Ora (NRC/Boston) (ora.lassila@nokia.com)
Date: 07/12/02
Ian, Ian Horrocks <horrocks@cs.man.ac.uk> wrote: > type(x,C) > P(x,y) > subClassOf(v,w) > > where C is an arbitrarily complex DAML+OIL class, P is a property that > is NOT used in RDF, RDFS or DAML+OIL syntax, I do not understand this. What do you mean by "RDF, RDFS or DAML+OIL _syntax_"? Do you mean any property defined in the rdf:, rdfs: or daml: namespaces? If so, this would exclude useful queries... > Anther kind of query one could imagine are syntax queries, i.e., > retrieve stuff that is written in the KB. I suppose we could use DQL > to do this. At this level, the KB could be considered as RDF/RDFS, and > queries could (in principal) be answered by one of the existing > "triple engines". It doesn't seem to make much sense to mix this kind > of query with the DAML+OIL semantically based queries discussed above. I agree, particularly remembering that even in RDF we can imagine a "semantic query" (i.e., one that respects the "inferential" aspects of RDF/RDFS). Who cares about triples anyway...? :-) - Ora -- Ora Lassila mailto:ora.lassila@nokia.com http://www.lassila.org/ Research Fellow, Nokia Research Center Chief Scientist, Nokia Venture Partners
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