This book constitutes the proceedings of the Fourth International IFIP Working Conference on Enterprise Interoperability (IWEI 2012), held in Harbin, China, September 6-7, 2012. The theme for IWEI 2012 was "Collaboration, Interoperability and Services for Networked Enterprises," so submissions and discussions focused on these three areas critical for enterprise interoperability.

The 10 full papers, 3 short papers, and 4 invited papers presented in this volume were carefully selected from 21 submissions, following a thorough reviewing process, during which each paper was scrutinized...