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The Computer Journal 1983 26(1):1-5; doi:10.1093/comjnl/26.1.1
© 1983 by British Computer Society
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Hierarchically Structured Production Rules*

P. Leith §

Faculty of Mathematics, Open University, Milton Keynes, UK

Production rules when used in ‘Expert Systems’1 have shown themselves to be effective means of encapsulating an expert's ‘knowledge’ about how to solve a problem. The ELI (Expert Legislative Information) system uses a novel means of hierarchically structuring these production rules which: (i) allows the production rules to be accessed in a parallel manner; (ii) allows the production rules to self-control access; (iii) allows each condition in the production to represent a richer semantic body of information than traditional production rule systems. In this paper, I discuss the notion of knowledge engineering and why hierarchically structured production rules can be useful.

Received August 1981.

* The production rule handling section of ELI, discussed in this paper, is available (along with basic documentation) from the author on receipt of a small magnetic tape.

§ Faculty of Mathematics, Open University, Milton Keynes, UK


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