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83:; 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.
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The OPS5 forward chaining process makes it extremely parallelizeable during the matching phase, and several automatic parallelizing compilers were created.
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73:, was especially efficient, sufficiently so that it was possible to scale up to larger problems involving hundreds or thousands of rules.
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The OPS (said to be short for "Official
Production System") family was developed in the late 1970s by
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had been working on production systems for some time, but Forgy's implementation, based on his
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is an extended implementation of the OPS5 language definition, developed for use with the
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Parallel
Implementation of OPS5 on the Encore Multiprocessor: Results and Analysis
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Genealogy: The OPS series and systems they are inspired from or inspired.
207:- Open-sourced language based on OPS5, with added modularity constructs.
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Anoop Gupta, Miland Tambe, Dirk Kalp, Charles Forgy, and Allen Newell,
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140:, Technical Report CMU-CS-81-135 (Carnegie Mellon University, 1981)
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38:, notable as the first such language to be used in a successful
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86:In this sense, OPS5 is an execution engine for a
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124:, RISC ULTRIX, and DEC OSF/1 operating systems.
106:The first implementation of OPS5 was written in
243:Common Lisp (programming language) software
213:- CMU Artificial Intelligence Repository
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223:Free OPS5 implementation in .Net Core
211:OPS5: RETE-based expert system shell
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156:Programming Expert Systems in OPS5
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90:extended with inhibitor arcs.
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219:- OPS5 source code on GitHub
99:was an early version, while
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59:Carnegie Mellon University
110:, and later rewritten in
46:system used to configure
67:artificial intelligence
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200:OPS5 Reference manual
65:'s research group in
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238:Functional languages
146:, Robert Farrell,
138:OPS5 User's Manual
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36:computer language
33:production system
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81:inference engine
78:forward chaining
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189:External links
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182:OPS5 Revisited
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160:Addison-Wesley
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71:Rete algorithm
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184:(Amazon 2016)
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168:0-201-10647-7
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144:Lee Brownston
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134:Charles Forgy
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152:Nancy Martin
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103:came later.
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76:OPS5 uses a
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63:Allen Newell
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217:source code
180:Rob Lewis,
148:Elaine Kant
114:for speed.
50:computers.
232:Categories
205:RuleWorks
128:References
29:rule-based
88:Petri net
57:while at
162:, 1985)
118:DEC OPS5
122:OpenVMS
44:R1/XCON
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42:, the
112:BLISS
101:OPS83
27:is a
164:ISBN
108:Lisp
97:OPS4
25:OPS5
48:VAX
31:or
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158:(
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