On Wed, Mar 08, 2006 at 09:49:33AM -0800, John Sowa wrote:
> Sorry, I misspoke. I meant the typing of OWL DL. (01)
So all you mean then is the ability to say more about classes in OWL DL?
There is typed *version* of OWL DL, at least not one recognized by W3C. (02)
> JS>> ... But for performance, reliability, security, etc.,
> >> RDF & OWL are still infants compared to RDBs, which run
> >> the world economy, both now and for a long time to come.
>
> CM> This is apples and oranges, isn't it? Talking about
> > reliability and security, and maybe even performance, with
> > respect to RDF/OWL is a lot like talking about them wrt,
> > say, Peano Arithmetic.
>
> I agree that expressivity depends on the logic of the SQL
> WHERE-clause vs the logic of RDF/OWL. But when we are
> talking about which platform to choose for an application,
> the surrounding support system becomes a major issue. (03)
I certainly agree with you on that score. (04)
> CM> RDF and OWL are theories in a certain language designed
> > to exploit the infrastructure of the web and, in the case
> > of OWL DL, the decidability of certain description logics.
>
> Other than the choice of an XML-based syntax, there's nothing
> about RDF and OWL that makes them any better suited to the WWW
> than SQL. (05)
Well, that's a pretty big "other than"! Creating an XML-based language
for publishing ontologies in which names are URIs was genius. And for
all its superficial ugliness, a standardized XML-based syntax cuts right
through religious wars about surface grammatical form. (06)
> All the major vendors have integrated their RDB systems into the web
> servers, and they support SQL queries over data represented in web
> pages. (07)
Well, being able to call a DB via a web server and actually having a
language tailored to the web are two quite different things -- as you
know, of course. And of course there is work being done on such
languages in W3C. (08)
-chris (09)
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