The 27 revised full papers, presented together with 3 invited talks were carefully reviewed and selected from a total of 138 final submissions. Presenting research results or experience reports in all areas relevant to object technology - including work that takes inspiration from or builds connections to areas not commonly considered object-oriented - the papers cover topics such as design methods and design patterns in analysis, concurrent systems, databases, persistence and transactions, distributed and mobile systems, frameworks, product lines and software architectures, language design and implementation, testing and metrics, programming environments and tools, theoretical foundations, type systems, formal methods, versioning, compatibility, software evolution, aspects, components, modularity, reflection, collaboration, and workflow.