| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
Home -> Community -> Usenet -> comp.databases.theory -> Re: RA with MV attributes
> This reminds me of Prolog's "negation as failure" approach.
Is it similar to dbd's as shown below?
A person named john.
It is unknown if he has or hasn't a car, bicycle, heart ...
(new 'john 'person)
A person named mary. It is known she has a furrarri.
(new 'furrarri 'car)
(new 'mary 'person)
(set mary has furrarri)
A person named bob. It is known he does not have a bug.
(new 'bug 'car)
(new 'bob 'person)
(set bob hasn't bug)
Received on Wed Jan 17 2007 - 20:52:58 CST
![]() |
![]() |