Generative and Component Based Software Engineering : Third International Conference GCSE 2001 Erfurt Germany September 10–13 2001 Proceedings This book constitutes the refereed proceedings of the Third International Conference on Generative and Component Based Software Engineering GCSE 2001 held in Erfurt Germany in September 2001.The 14 revised full papers presented together with one invited paper were carefully reviewed and selected from 43 submissions. The papers are organized in topical sections on software product lines aspects generic and generative approaches and components and architectures