A model-based approach to address the design of Web 2.0 applications based on Web services

Creating an interactive application based on pre-existing functionalities poses a number of novel issues in the design process. We discuss a method, associated with a new model-based language and a supporting tool, which aims to address such issues in multi-device contexts. One specific aspect of this method is the possibility of supporting composition of user interfaces associated with different services. In addition, the possibility to specify dynamic user interfaces, Web services accesses and scripts allows designers to declaratively describe Rich Internet Applications as well.