OPS5

(language)

OPS5 - A programming language for rule-based production systems. 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 <forgy@cs.cmu.edu> 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. CLIPS is a language for writing expert systems, with some of the capabilities of OPS5. See also C5, OPS83, OPS4, OPS5+, OPS83. Inference Engine Tech, Cambridge MA. An OPS5 interpreter in Common LISP. A version by Mark Kantrowitz. <mkant+@cs.cmu.edu>. ["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].