Abstract
In the last decade, several and different trajectory data warehouses have been proposed, as an extension of traditional ones to take into account mobility data provided by ubiquitous systems. As a new paradigm, it was adopted by users in various applications such as patient trajectory in the field of health care systems. However, the proposed conceptual models suffer from dispersed points of view that have to be unified in order to offer generic conceptual support for experts and ordinary users. The goal of this work is to propose a unified conceptual model able to unify different points of view through a generic description of facts on one hand and dimensions of analysis such as patient and medical organism well adapted to new concepts imposed by the emergence of pervasive systems. In addition, we illustrate our work on a health care case study involving the modeling and the analysis of patients trajectories describing actions performed by medical actors in order to take care of patients' needs and to offer new means to decision makers to improve health care services quality.