An Observational Model for Spatial Logics

Spatiality is an important aspect of distributed systems because their computationsdepend both on the dynamic behaviour and on the structure of their components.Spatial logics have been proposed as the formal device for expressing spatial prop-erties of systems.We define CCS||, a CCS-like calculus whose semantics allows one to observe spa-tial aspects of systems on the top of which we define models of the spatial logic.Our alternative definition of models is proved equivalent to the standard one. Fur-thermore, logical equivalence is characterized in terms of the bisimilarity of CCS||.