Abstract:When designing a mobile application, we have to be aware of the properties and facilities of the target platform. At a conceptual level, this platform can be specified by a style, defining the structures and operations available to applications. In this paper, we use an UML-like meta model for the structural aspect and graph transformation rules over its instances to specify the dynamics of a style of mobile systems. The model is layered to separate clearly the software from the hardware and the geographic view of the system.