An Extended Agent BDI Model with Norms, Policies and Contracts

It is important to constitute agent with motivation in agent-based computing. Recent study of the definition of motivation and its effects on reasoning mechanism of agent are not complete. This paper presents a model of agent based on norms, policies and contracts, in which the motivation from external environment can be explicitly expressed and integrated into agent´s reasoning process. In order to conduct nonmonotonic reasoning abilities, defeasible logic is imported. The extended agent BDI model (NPCD-agent), relevant BGI_NPCD logic and reasoning mechanism is the core of this system, which is formally specified in this paper.