Abstract. This paper introduces semantical concepts to support a formal structural dynamics of situated multiagent systems. Multiagent systems are seen from the perspective of the Population-Organization model, a minimal semantical model where the performance of organizational roles by agents, and the realization of organizational links by social exchanges between agents, are the key mechanisms for the implementation of an organization structure by a population structure. The structural dynamics of a multiagent system may then be modelled as a set of transformations on the system’s overall population-organization structure. We illustrate the proposed approach to structural dynamics by introducing a small set of operational rules for an exchange value-based dynamics of organizational links. The paper sets the stage for further work on structural dynamics where other structural elements, besides organizational links, are taken into account.