Intentions, an integral part of the mental state of an agent, play an important role in

Individual agents situated in dynamic environments must balance the need to react to new situations against their commitment to some current activity. When teams of agents engage in collaborative activity, new questions arise concerning the representation and synchronized execution of actions. In this paper we describe a language for representing plans designed for teams of agents, and present a possible-worlds semantics for joint attitudes and for plan execution. This formalism provides a framework for representing and reasoning about joint action in which various approaches to co-ordination and commitment can be explored. 1 Introduction Resource-bounded agents situated in dynamic environments must balance the need to react to new situations against their commitment to some current activity. For us, a rational agent can be characterized as having beliefs about the real world, goals or desires that need to be satisfied, plans that can achieve nominated goals, and committed partial p...