<language> A programming language for rule-based production system
A rule consists of pre-condition(s) and a resulting action.
The system checks its working memory to see if there are rules whose pre-conditions are satisfied, if so, the action in one selected satisfied rule is executed.
There is a public domain
implementation of an OPS5 interpreter
written by Charles L. Forgy <[email protected]
> in 1977.
It was first implemented in Lisp
and later in BLISS
It was also ported to Common Lisp
by George Wood and Jim Kowalski.
is a language for writing expert system
s, with some of the capabilities of OPS5.
See also C5
, OPS4, OPS5+, OPS83
Inference Engine Tech, Cambridge MA.
An OPS5 interpreter in Common LISP (ftp://ftp.wustl.edu/mirrors/Unix-c/languages/ops5).
A version by Mark Kantrowitz (ftp://ftp.cs.cmu.edu/afs/cs.cmu.edu/user/mkant/Public/Lisp/). <[email protected]
["Programming Expert Systems in OPS5", L. Brownston et al, A-W 1985].
["An OPS5 Primer", Sherman et al, comes with OPS5 for DOS].
["Rule-Based Programming in the Unix System", G.T. Vesonder, AT&T Tech J 67(1), 1988].