Expectation-Based Temporal Projection System

This paper is a preliminary report on EXTEPS, a domain independent temporal projection system. The main goal of EXTEPS is anticipating a future action set which is supposed to be the behavior that best f i ts the agentS intentions. This set of future actions and the intentions of the agents are both described by means of the same language used in the PETRUS control system. PETRUS is a procedural control system based on Petri nets and production rules. The central idea in EXTEPS is to focus the attention on the set of internal and external events which can change the state of the world. These relevant events could affect the antecedent parts of rules and the predicate associated to the transition of the nets.