Web services and Model-driven development are two emerging research fields and have been receiving a lot of attention in the recent years. New approaches on these two areas can bring many benefits to the development of information systems, distribution flexibility, interoperability, maintainability and portability. Nevertheless, these emerging fields pose new promising challenges to the research community. Some of the current challenges in the web services field are service composition, support for quality of service, security and integration of legacy systems; in the model-driven development field are the mappings between metamodels, model transformations, semantic distance and traceability. This volume contains the Proceedings of the 3rd International Workshop on Web Services: Modeling, Architecture and Infrastructure (WSMAI 2005), and the Proceedings of the First International Workshop on Model-Driven Enterprise Information Systems (MDEIS 2005). WSMAI 2005 and MDEIS 2005 aim at
serving as a forum for researchers and practitioners to meet and share expertise in the fields of Web services and Model-driven development, respectively. WSMAI 2005 has received fifteen papers; nine papers were accepted for regular oral presentation and three papers were accepted as posters. MDEIS 2005 has received ten papers; five papers were accepted for regular oral presentation and two papers were accepted as posters. We would like to take this opportunity to thank the people who have contributed to WSMAI 2005 and MDEIS 2005. We would like to thank the members of the WSMAI 2005 and MDEIS 2005 Program Committees for the terrific job they did in evaluating papers and the authors for their paper contributions in shaping the final programs. Finally, special thanks to Joachim Filipe and Vitor Pedrosa for their hard work in making the workshops and this volume possible. We wish you an exciting, fruitful workshop, and an unforgettable stay in the lovely city of Miami.
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