Reference & User Manual
|Release Level||7.0||Release Date||2016 12||Revision Level||beta|
|Last modified on: Monday, 15-Aug-16 16:37 CEST|
Rules: first order production rules
Backward Chaining Rules define how values for DESCRIPTORs are derived from values of other DESCRIPTORs, user inputs, simulation model results or other information available (data bases, GIS, etc.).
RULE <rule#> IF <condition> THEN <action> ENDRULE <condition> := <condition <logical operator> <condition> := descriptor <comparative operator> <operand> := descriptor <singular operator> := TRUE <action> := descriptor = <operand> := descriptor <meta operator> <constant> <operand> := <operand> <arithmetic operator> <operand> := descriptor := <constant> <logical operator> := AND | OR <comparative operator> := < | > | <= | >= | == | != <singular operator> := EXISTS | NOT_EXISTS <arithmetic operator> := [ | ] | * | / | + | - <meta operator> := INCREASES_BY | DECREASES_BY := BECOMES <constant> := string := number
Also, the user can call up a knowledge base browser, that allows to navigate in the tree structure of the knowledge base within the context of individual problems. The browser can descend the inference tree, displaying sets of rules referring to a list of DESCRIPTORs and allow to inspect individual DESCRIPTOR definitions. The possibility to integrate models in place of rules in an expert system and at the same time use embedded rule-based components in models provides a very rich repertoire of building blocks for interactive software systems.
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