BUILDING TEMPORAL CONSTRAINTS INTO KNOWLEDGE BASES FOR PROCESS-CONTROL - AN EXAMINATION

This brief paper examines the results in Parthasarathys papers publish ed earlier in Engineering Applications of Artificial Intelligence, In these papers an extension to Allen's interval-interval temporal relati ons is proposed, so as to include interval-event (i.e. interval-point) , event-interval, and event-event relations. However, this extension i s based on intuitive arguments, and it is shown in this paper to be in complete and inconsistent. Parthasarathy's results are compared with a n axiomatic approach given previously by the authors, which overcomes these deficiencies.