Re: problems with DAML+OIL

From: Jim Hendler (
Date: 01/15/01

At 9:55 -0500 1/12/01, Peter F. Patel-Schneider wrote:
>[I expect that I will also send this out to rdf-logic (possibly modified),
>but I wanted to send it to the committee now, and I can't send it to
>rdf-logic until DAML+OIL is released.  peter]

Folks- language is announced - go for it!

>OK, now that there is a DAML+OIL release, it is time to try to put a
>spanner in the works.  (Not that it is time to sabotage the release, it is
>just that it is now time to see what problems remain, so that the next
>release can fix them.)  I expect that this list is not complete!
>Problem 1:  The lack of a theory of identity (or equality, or equivalence)

I agree with Peter that this is important, and that we need it. 
However, I wonder if the correct solution isn't a langauge feature to 
allow it to be said -- we have the ability to say things are the same 
class or same property -- why not a similar explicit construct for 
same entity?  I wanted to ask this here, rather than on rdf-logic, 
because it is likely I am missing something, and figured I'd rather 
get beaten up in private, rather than in public

Prof. James Hendler		Program Manager
DARPA/ISO			703-696-2238 (phone)
3701 N. Fairfax Dr.		703-696-2201 (Fax)
Arlington, VA 22203

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