Report of the 4th international workshop on principles of engineering service-oriented systems (PESOS 2012)

The 4th International Workshop on Principles of Engineering Service-Oriented Systems (PESOS 2012) was held at the International Conference on Software Engineering, ICSE 2012, on June 4, 2012. The special theme of this 4th edition of PESOS was "The Internet of Services." PESOS 2012 brought together software engineering researchers from academia and industry, as well as practitioners working in the areas of service-oriented systems, to discuss research challenges, recent developments, novel application scenarios, as well as methods, techniques, experiences, and tools to support engineering, evolution and adaptation of large-scale, highly-dynamic serviceoriented systems. For the first time, PESOS featured a special session on "The Quest for Case Studies." This effort created an initial reference set of case studies, hosted on a publicly-available repository, for the research community in service-oriented systems. The multiple discussions throughout the day resulted in the identification service requirements for the Internet of Services.