Fuzzy conditional temporal problems: Strong and weak consistency

: In real life scenarios there is often the need for modelling conditional plans where external events determgine the actual execution sequence. Conditional Temporal Problems (CTPs) have addressed such a need by extending the classical temporal constraint models with conditions on the occurrence of some events. Preferences are also a key aspect in many temporal reasoning tasks, since they allow for modeling in a natural way desires and different satisfaction levels. In this paper, we generalize CTPs to CTPPs by adding fuzzy preferences to the temporal constraints and by allowing fuzzy thresholds for the occurrence of some events. This allows us to generalize the conditions: events are allowed to determine not only which variables are executed, but also the preferences associated to their execution time. We consider two consistency notions (that is, strong and weak) and we provide their corresponding testing algorithms. We show that the complexity of these algorithms is not larger than ...

• Type: Journal
• Year: 2008
• Where: EAAI
• Authors: Marco Falda, Francesca Rossi, Kristen Brent Venable
• Keywords: Conditional Temporal Problems, EAAI 2008, Preferences, Temporal Constraints