This paper presents a Knowledge Base System (KBS) as a key component of a federated
simulation framework aimed at investigating the dependencies among Critical
Infrastructures (CIs). The KBS, based on the ontological formalism, represents the properties
and the relations of each simulation domain and the dependency relations among different
domains. Some auxiliary data structures, necessary to model the interaction among the
simulators of different CIs, have been defined and have been populated through suitable …