Modelling Weiser´s “Sal” scenario with CML

Context modelling approaches differ in what concepts can be captured by application designers, in the expressive power of the context models, in the support they can provide for reasoning about context, and in the way they facilitate software engineering of context-aware applications. In this paper we respond to the challenge of CoMoRea´09 and show how the Context Modelling Language (CML) and the concepts associated with CML can be used to engineer applications that exhibit behaviour described in Mark Weiser´s ldquoSalrdquo scenario. The paper presents the CML based models for applications from the ldquoSalrdquo scenario and evaluates the approach based on the criteria defined for the challenge including knowledge and software engineering effort, flexbility, usability, and support for uncertain information.