Path: utzoo!attcan!uunet!cs.utexas.edu!yale!mintaka!bloom-beacon!eru!luth!sunic!tut!funic!santra!hutcs.hut.fi!ora
From: ora@hutcs.hut.fi (Ora Lassila)
Newsgroups: comp.lang.lisp
Subject: Re: PD CL Frame Rep Languages Wanted
Message-ID: <1990Jul20.114934.7594@santra.uucp>
Date: 20 Jul 90 11:49:34 GMT
References: <9438@bunny.GTE.COM>
Sender: news@santra.uucp (Cnews - USENET news system)
Organization: Helsinki University of Technology
Lines: 33

In article <9438@bunny.GTE.COM> rjb1@GTE.COM (Richard J. Brandau) writes:
> I'm in search of good public domain, Common Lisp implementations of
> frame languages.  Where might I look?
> 
> -- Rich Brandau, rjb1@gte.com, GTE Labs, Waltham MA

We are currently developing a compact, fully portable, Common Lisp -based 
frame system called BEEF. In addition to being a conventional frame 
system, it can also be used for object-oriented programming. BEEF is 
currently being used to implement a distributed knowledge-based production 
scheduler.

BEEF has, in addition to frames, slots and values, several advanced 
features: user-defined relations enable (dynamic) inheritance to be 
customized on a slot-to-slot basis. Parallel and nested versions of the 
frame universe can be maintained using a context mechanism called 
"worlds". Worlds can be used, for example, to implement backtracking 
search algorithms. BEEF also features demons and easy method definition 
facilities.

So far, BEEF has been tested with Macintosh Allegro Common Lisp, KCL, 
Symbolics Common Lisp, Sun Common Lisp and Franz Allegro Common Lisp.

BEEF will be made available through anonymous FTP. This will happen
during fall 1990.

  Ora Lassila
  Laboratory of Information Processing Science
  Helsinki University of Technology
  Otakaari 1
  02150 ESPOO, FINLAND

  Internet: ora@hutcs.hut.fi