This book constitutes the refereed proceedings of the 4th International
Conference on E-Commerce 2003, held in Prague, Czech Republic in
September 2003.
The 42 revised full papers presented together with an invited paper and
a position paper were carefully reviewed and selected from 108
submissions. The papers are organized in topical sections on auctions,
security, agents and search, ebXML, modeling and technology, XML, design
and performance, business processes, and brokering and recommender
systems.