When Even the Interface Evolves...

This paper extends the authors' previous work on a formal approach to the specification of reconfigurable systems, introduced in [7], in which configurations are taken as local states in a suitable transition structure. The novelty is the explicit consideration that not only the realisation of a service may change from a configuration to another, but also the set of services provided and even their functionality, may themselves vary. In other words, interfaces may evolve, as well.