14.1.4. Alternative modelling
It may be useful to devise another syntax for state and perspectives. Traditionally, states are modelled as syntactical units, with parts specifying entry- and exit actions. In Perspectives we might have states as containers within contexts, defining some roles in some states and not in others. There are problems to be solved, like unifying roles that occur in two or more states but with different perspectives, for example. We consider this to be future extensions.