citseer is temporarily down. The paper is online at
http://www.inf.unibz.it/%7ecalvanese/papers/calv-degi-lenz-SWWS-book-2002.pdf (01)
Christopher Menzel wrote:
> On 8/16/06 8:57 AM, "Rex Brooks" <rexb@xxxxxxxxxxxxxx> wrote:
>> I find this thread curiously satisfying, since it is covering a
>> number of developments I have been involved with and/or following for
>> several years now. The mention of Siderean Seamark, about which I
>> learned a little last year, and the notion of quads, in addition to
>> triples leads to what I happen to think is the next major task that
>> needs to be tackled (most likely by the W3C), namely moving RDF from
>> "triples" to "tuples" to pave the way for "n-ary databases."
>
> There does in fact appear to be a solution to this problem (which I've only
> recently been made aware of myself). Calvanese, De Giacomo, and Lenzerini
> in their paper "A Framework for Ontology Integration"
> (http://tinyurl.com/reamq) describe a description logic DLR with n-ary
> relations that extends the description logic underlying OWL-DL without
> increasing its complexity. It is straightforward to encode DLR in OWL-DL.
> For some reason this information does not seem to have made its way into the
> work of the W3C committee that is investigating n-ary extensions to RDF. I
> am not an expert on OWL or DLs, but FWIW I am unable to see any theoretical
> reasons why a DLR encoding wouldn't do the job.
>
> Chris Menzel
> (02)
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