Rapid development of scoped user interfaces

Abstract. As the demand for domain- and formalism-specific visual modelling environments grows, the need to rapidly construct complex User Interfaces (UIs) increases. In this paper, we propose a Multi-Paradigm Modelling (MPM) approach whereby structure, visual appearance and above all reactive behaviour of a UI are explicitly modelled. These models are constructed at the most appropriate level of abstraction, using the most appropriate modelling formalisms. This allows for rapid applica-tion synthesis, easy adaptation to changing requirements, and simplified maintenance. In this paper, we introduce Scoped User Interfaces, and il-lustrate how one may model them using Hierarchically-linked Statecharts (HlS). The use of HlS is demonstrated through the rapid development of a DChart formalism-specific modelling environment.