Re: Storing data and code in a Db with LISP-like interface

"Neo" <neo55592_at_hotmail.com> wrote in message news:1146238552.854074.157840_at_u72g2000cwu.googlegroups.com...

> Let me see if I can engage you (or another ProLoger/LISPster) in a much
> simpler example. The goal: Find the thing with whom john's relationship
> is opposite that of with mary. Below is dbd's abbridged script:
>
> (create person instance john)
> (create person instance mary)
> (create person instance bob)
> (create verb instance like)
> (create verb instance hate)
> (create like opposite hate)
> (create john like mary)
> (create john hate bob)
>
> // This query finds, it is bob.
> (select john
> (select (& (select verb instance *) (select john * mary))
> opposite
> *)
> *)
>
> Note: I deduct points for methodologies that are not systematic :)
>

I'm tired of this game.

I'm going to reply with the simplest solution I can think of. It will surely not match requirements that are not in evidence right now.

opposite(like,hate).
relationship(john,like,mary).
relationship(john,hate,bob).

// let's pose the question:
// for whatever relationship john has with mary, find another person with whom john has the opposite relationship

? relationship(john, R1, mary), opposite(R1, R2), relationship(john, R2, Other)

Prolog replies

   R1 = like
   R2 = hate
   Other = bob

OK. I've done my part. Now it's your turn. Please start here:
http://www.aaai.org/AITopics/html/struc.html

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