OPS5

OPS5

OPS5 is a rule-based or production system computer language, notable as the first such language to be used in a successful expert system, the R1/XCON system used to configure VAX computers.

The OPS (said to be short for "Official Production System") family was developed in the late 1970s by Charles Forgy while at Carnegie Mellon University. Allen Newell's research group in artificial intelligence had been working on production systems for some time, but Forgy's implementation, based on his Rete algorithm, was especially efficient, sufficiently so that it was possible to scale up to larger problems involving hundreds or thousands of rules.

OPS5 uses a forward chaining inference engine; programs execute by scanning "working memory elements" (which are vaguely object-like, with classes and attributes) looking for matches with the rules in "production memory". Rules have actions that may modify or remove the matched element, create new ones, perform side effects such as output, and so forth. Execution continues until no more matches can be found.

OPS4 was an early version, while OPS83 came later.

The first implementation of OPS5 was written in Lisp, and later rewritten in BLISS for speed.

DEC OPS5 is an extended implementation of the OPS5 language definition, developed for use with the VMS, RISC ULTRIX, and DEC OSF/1 operating systems.

References

  • Charles Forgy, OPS5 User's Manual, Technical Report CMU-CS-81-135 (Carnegie Mellon University, 1981)
  • Lee Brownston, Robert Farrell, Elaine Kant, Nancy Martin, Programming Expert Systems in OPS5 (Addison-Wesley, 1985) ISBN 0-201-10647-7

External links


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • OPS5 — Operationale ProduktionsregelSprache, entwickelt in LISP zur Entwicklung von Expertensystemen …   Acronyms

  • OPS5 — Operationale ProduktionsregelSprache, entwickelt in LISP zur Entwicklung von Expertensystemen …   Acronyms von A bis Z

  • Production system — A production system (or production rule system) is a computer program typically used to provide some form of artificial intelligence, which consists primarily of a set of rules about behavior. These rules, termed productions, are a basic… …   Wikipedia

  • Charles Forgy — Dr Charles L. Forgy (born December 12, 1949 in Texas) is a computer scientist, known for developing the Rete algorithm used in his OPS5 and other production system languages used to build expert systems. Contents 1 Biography 1.1 Early Life 1.2… …   Wikipedia

  • OpenVMS — New logo Old logo OpenVMS V7.3 1 run …   Wikipedia

  • List of programming languages by category — Programming language lists Alphabetical Categorical Chronological Generational This is a list of programming languages grouped by category. Some languages are listed in multiple categories. Contents …   Wikipedia

  • Hello World — Pour les articles homonymes, voir Hello (homonymie). hello world (traduit littéralement en français par « bonjour le monde ») sont les mots traditionnellement écrits par un programme informatique simple dont le but est de faire la… …   Wikipédia en Français

  • Genera (operating system) — Genera Company / developer Symbolics OS family Lisp Machine OS Initial release 1982 …   Wikipedia

  • List of programming languages — Programming language lists Alphabetical Categorical Chronological Generational The aim of this list of programming languages is to include all notable programming languages in existence, both those in current use and historical ones, in… …   Wikipedia

  • Rete algorithm — The Rete algorithm is an efficient pattern matching algorithm for implementing production rule systems. The Rete algorithm was designed by Dr Charles L. Forgy of Carnegie Mellon University, first published in a working paper in 1974, and later… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”