Abstract
The aim of the work is to develop formal models of interaction and of the related support infrastructures, that overcome the limits of the current approaches. We propose to represent explicitly not only the agents but also the computational environment in terms of rules, conventions, resources, tools, and services, that are functional to the coordination and cooperation of the agents. These models will enable the verification of the interaction in the MAS, thanks to the introduction of a novel social semantics of interaction based on commitments and on an explicit account of the regulative rules.