Introductory paper.

Provides an overview of selected papers that deals with different aspects of tool data integration techniques from a meta-modeling point of view, presented at the European Software Engineering Conference 2003 Workshop on Tool Integration in System Development, which took place on September 1-2, 2003 in Helsinki, Finland. Survey of model integration and transformation approaches; Suggested systematic approach for the development of the architecture of integrated development environments; List of sessions where the papers were presented.