This book constitutes the refereed proceedings of the 15th International Conference on Electronic Commerce and Web Technologies (EC-Web) held in Munich, Germany, in September 2014.

The 11 full and8 short papers included in this volume were carefully reviewed and selected from 46 submissions. The papers are organized in topical sections on data, information, and knowledge management for e-business; Semantic Web and linked open data for e-business; search, matchmaking, recommender and comparison systems; economics, management, and law; and social interaction in e-business.