An Approach of Mediation

This article proposes an approach of mediation for the integration of heterogeneous data. Its contribution is on two complementary axes: (i) to propose a multimediators architecture essentially made up of two types of components: specialized mediators and a global mediator. The specialized mediators provide each one an integrated view of sources with the same models. The global mediator integrates the partial schemes provided by the specialized mediators to provide an access on a uniform view represented by a global scheme. (ii) to model the relation between the global scheme and the sources via the partial schemes by using a hybrid approach which consists in combining the two approaches Global As View (GAV) and Local As View (LAV). This enables us to benefit from their advantages.