Abstract. The goal of this work is to present the software WebRatio 5, which is a good representative of a new generation of CASE tools for model-driven design of Web applications. WebRatio 5 supports the WebML language and methodology, and exploits the implementation experience of previous versions of the software for providing user-friendly application design paradigms and reliable code generation engines. The tool is developed as a set of Eclipse plugins and takes advantage of all the features of this IDE framework. Moreover, it provides new capabilities in terms of support of extensions to the models, project documentation, and coverage of new phases of the development lifecycle. The overall approach moves towards a full coverage of the specification, design, verification, and implementation of Web applications.

Internet of Things technologies and applications are evolving and continuously gaining traction in all fields and environments, including homes, cities, services, industry and commercial enterprises. However, still many problems need to be addressed. For instance, the IoT vision is mainly focused on the technological and infrastructure aspect, and on the management and analysis of the huge amount of generated data, while so far the development of front-end and user interfaces for IoT has not played a relevant role in research. On the contrary, user interfaces can play a key role in the acceptance of IoT solutions by final adopters. In this paper we discuss the requirements and usage scenarios covering the front end aspects of IoT systems and we present a model-driven approach to the design of such interfaces by: defining specific components and design patterns using a visual modeling language for IoT applications; describing an implementation of the solution that comprises also automatic code generation from models; and by showing the solution at work.

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