Slot accessing method in object-oriented expert system
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United States of America Patent
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Aug 31, 1993
Grant Date -
N/A
app pub date -
Aug 9, 1991
filing date -
Aug 20, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A slot accessing method in an object-oriented expert system, wherein data, which is indicative of necessity or non-necessity of re-computation of a slot value and which is created according to a dynamic dependency between a reference slot and a reference slot, is set in a reference slot of an object having a reference rule. When the re-computation is necessary, a flat 'T' indicative of the effect is set, whereas when the re-computation is unnecessary, a flat 'NIL' indicative of the effect is set. When the value of a slot of an object having a reference slot as its slot value is changed, it is judged whether or not it is necessary to re-compute the slot value of the corresponding reference slot on the basis of data that is indicative of necessity or non-necessity of re-computation of the slot value and that is set in the corresponding reference slot. If the flag 'NIL' is set in the corresponding reference slot, then no re-computation is carried out for the slot value.
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