This book constitutes the thoroughly refereed proceedings of the 47th International Conference on Objects, Components, Models and Patterns, TOOLS EUROPE 2009, held in Zurich, Switzerland, in June/July 2009. TOOLS has played a major role in the spread of object-oriented and component technologies. It has now broadened its scope beyond the original topics of object technology and component-based development to encompass all modern, practical approaches to software development. At the same time, TOOLS has kept its traditional spirit of technical excellence, its acclaimed focus on practicality, its well-proven combination of theory and applications, and its reliance on the best experts from academia and industry. The 17 regular papers and two short papers presented in this book, together with two invited papers, were carefully reviewed and selected from 67 submissions. The topics covered in this volume are reflection and aspects, models, theory, components, monitoring, and systems generation.