This book constitutes the proceedings of the Second IFIP WG 5.8 International Workshop on Enterprise Interoperability, IWEI 2009, held in Valencia, Spain, in October 2009.

The 11 contributions included in the volume were carefully reviewed and selected from 25 submissions. The papers are representative of the current research activities in the area of enterprise interoperability. They cover a wide range of enterprise interoperability issues from foundational theories, frameworks, architectures, methods and guidelines to project results and case studies.