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Production system for an expert system

  • US 4,937,755 A
  • Filed: 04/28/1988
  • Issued: 06/26/1990
  • Est. Priority Date: 05/06/1987
  • Status: Expired due to Fees
First Claim
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1. A production system for an expert system comprising;

  • a production rule memory unit for storing a plurality of production rules, each having a condition part and an execution part and a provisionally predetermined priority;

    a task data memory unit for storing a plurality of task data, each being subjected to an application of the production rules;

    a production rule interpretation and execution unit for selecting a production rule in accordance with the provisionally predetermined priority, collating the condition part of the selected production rule with the task data to determine whether the condition part matches with at least a part of the task data and, when both match each other, renewing the part of the task data by the corresponding execution part of the production rule, wherein one collation cycle of said production rule interpretation and execution unit finishes when a collation success is effected and a next collation cycle thereof starts thereafter;

    each production rule being further provided with a rule flag indicating a collation failure to the task data; and

    a rule flag memory unit for setting the rule flag of a production rule when a condition part thereof did not match any of the task data during the collation cycle to inhibit further collation thereafter until collation of all the other production rules is once completed.

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