Abstract: A method of keeping coherent contents of a travel shopping basket gathering travel products from independent travel service providers is described. The method is characterized in that it includes a first step to synchronize the travel shopping basket upon reception of notifications of changes received from the independent travel service providers, and to further determine what changes have been brought to the gathered travel products by the independent travel service providers. It includes a second step to aggregate the changes into the travel shopping basket so that to transform characteristics of the gathered travel products into specific attributes of the travel shopping basket; and to integrate local attributes into the travel shopping basket. Finally, a third step is aimed at correlating all attributes of the travel shopping basket against each other, matching all attributes functionally equivalent and removing duplicated attributes from the travel shopping basket.