E-commerce is a new form of trade that takes increasingly importance in various fields, such as tourism or transport. With the spread of the Internet, users become more demanding and want to express and get answers to more complex requests, including multiple functionalities, conditions, constraints and objectives. Most complex requests including multiple functionalities cannot usually be answered by one single Web service. As multiple services are needed, the problem is then to find good combinations using the available services but also to select the best ones according to user objectives...
E-commerce is a new form of trade that takes increasingly importance in various fields, such as tourism or transport. With the spread of the Internet,...
