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Yao (1994) has presented a unified time Petri net model (TPN) for temporal knowledge representation and reasoning, where the TPN model presented has a good contribution to the aspect of temporal knowledge representation and reasoning. However, there are a number of errors which should be corrected. The purpose of the paper is to identify these errors, and the corrections provided permit the readers who have been confused by the errors to gain a better understanding of the good ideas presented.
Systems, Man, and Cybernetics, Part B: Cybernetics, IEEE Transactions on (Volume:27 , Issue: 1 )
Date of Publication: Feb. 1997