Abstract
Recommender systems in travel industry make helpful and persuasive product and service suggestions and thus reduce the burden of information overload and domain complexity for users. Within the scope of the etPlanner project we innovate existing technology by considering all trip phases and by supporting next to standard Web interfaces also different mobile devices.
In this paper we will elaborate the requirements that such a comprehensive and integrative approach imposes on system architecture and involved technology and discuss the different components of the framework. The system behaves in a personalised way with respect to the three dimensions the user, the situational context and the involved technical device. Parts of the system are already in productive use.