This volumecomprises the ?nal versionsof the technicalpapers presented at the UML 2004 conference held in Lisbon (Portugal), October 11-15, 2004. UML 2004 was the seventh conference in a series of annual UML conferences. The series started in 1998 and was located at Mulhouse (France); the following years saw the conference move to Fort Collins (USA) in 1999, York (UK) in 2000,Toronto (Canada) in 2001,Dresden (Germany) in 2002,San Francisco (USA) in 2003, and now Lisbon (Portugal) in 2004. During this time, the UML conference became one of the leading conferences in the area of object-oriented modeling. While in the ?rst years the focus of the conference was on the scienti?c investigation of the Uni?ed Modeling Language (UML), which had just been adopted by the Object Management Group (OMG) at the time, the focus has changed in recent years to innovations in techniques such as metamodeling, model transformations, model validation and veri?cation, aspect orientation, and beyond. Many recent research activities have been especially stimulated by the Model Driven Architecture (MDA) initiative, started in 2000 by the OMG. The goal of MDA is the de?nition of a framework to enable the development of software purely based on models. In order to re?ect the changes of recent years, the conference series UML will be continued, from 2005 onwards,under thenameMODELS(MOdelDrivenEngineering,Languagesand Systems). The call for papers for UML 2004 encouraged authors around the world to submit 157abstractsand 135technicalpapers. Eachsubmissionwasreviewed by at least three referees, in most cases by four.

The Ninth International Conference on Reliable Software Technologies, Ada- Europe 2004, took place in Palma, Spain, June 14-18, 2004. It was sponsored by Ada-Europe, the European federation of national Ada societies, and Ada- Spain, in cooperation with ACM SIGAda. It was organized by members of the University of the Balearic Islands (UIB). As in past years, the conference comprised a three-day technical program, during which the papers contained in these proceedings were presented, along with vendor presentations. The technical program was bracketed by two tutorial days, when the attendees had the opportunity to catch up on a variety of topics related to the ?eld, at both introductory and advanced levels. Furthermore, the conference was accompanied by an exhibition where vendors presented their products for supporting reliable-software development. Invited Speakers Theconferencepresentedfourdistinguishedspeakers, whodeliveredstate-of-t- art information on topics of great importance, both for now and for the future of software engineering: - S. Tucker Taft, SoftCheck Inc., USA Fixing software before it breaks: using static analysis to help solve the so- ware quality quagmire - Martin Gogolla, University of Bremen, Germany Bene?ts and problems of formal methods - Antoni Oliv e, Polytechnical University of Catalonia, Spain On the role of conceptual schemas in information systems' development - Stephen Vinoski, IONA Technologies in Waltham, USA Can middleware be reliable? Wewouldliketoexpressoursinceregratitudetothesedistinguishedspeakers, well known to the community, for sharing their insights with the conference participants. Submitted Papers Alargenumberofpapersweresubmitted, fromasmanyas15di?erentcountries."

The refereed proceedings of the 8th International Conference on Reliable Software Technologies, Ada-Europe 2003, held in Toulouse, France in June 2003. The 29 revised full papers presented together with 3 invited papers were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on Ravenscar, language issues, static analysis, distributed information systems, software metrics, software components, formal specification, real-time kernel, software testing, and real-time systems design.

This book constitutes the refereed proceedings of the 7th International Conference on Reliable Software Technologies, Ada-Europe 2002, held in Vienna, Austria, in June 2002.The 24 revised full papers presented together with four invited papers were carefully reviewed and selected for inclusion in the proceedings. The papers are organized in topical sections on embedded systems, case studies, real-time systems, high-integrity systems, Ada language issues, program analysis, tools, distributed systems, and libraries and APIs.

This book constitutes the refereed proceedings of the 6th International Conference on Reliable Software Technologies, Ada-Europe 2001, held in Leuven, Belgium, in May 2001.The 27 revised full papers presented together with five invited papers were carefully reviewed and selected from a large number of submissions. The papers are organized in topical sections on program analysis, distributed systems, real-time systems, language and patterns, dependable systems, APIs and components, real-time kernels, standard formats: UML and XML, and system evolution.

This book constitutes the refereed proceedings of the 1996 Ada-Europe International Conference on Reliable Software Technologies, held in Montreux, Switzerland, in June 1996.
The 35 revised full papers selected for inclusion in the volume, along with four attractive invited papers, were contributed by researchers, developers, and users; they cover numerous aspects of the Ada 95 programming language and address various current topics of reliable software in general. Among the issues addressed are software development methods, verification and validation, safety and security, distributed systems, real-time systems, compilers and tools, the Ada 95 language, and interfaces to other worlds.