The papers in this volume aim at obtaining a common understanding of the challenging research questions in web applications comprising web information systems, web services, and web interoperability; obtaining a common understanding of verification needs in web applications; achieving a common understanding of the available rigorous approaches to system development, and the cases in which they have succeeded; identifying how rigorous software engineering methods can be exploited to develop suitable web applications; and at developing a European-scale research agenda combining theory, methods and tools that would lead to suitable web applications with the potential to implement systems for computation in the public domain.

Formal modelling and verification of transactional web services composition. A refinement and proof approach with Event-B.-Towards a Model of Services based on Co-creation, Abstraction and Rights Distribution.- Integrating a Model-Driven Approach and Formal Verification for the Development of Secure Service Applications.- A Formal Model of Client-Cloud Interaction.- W*H: The Conceptual Model for Services.- Monitoring of Client-Cloud Interaction.- Formal Reliability Models for Web Services.- What Constitutes a Service on the Web?.- Co-Design of Web Information Systems.