Proposition ? l'int?gration des profils dans le processus de recherche d'information

The formulation of the user’s information need is a key step to get relevant results. In order to assist users to better express their information need, many systems introduce the user profile concept. Profiles include several information in order to improve the expression of the user’s need and also to filter the retrieved results. The system presented in this paper joins this framework. Our system integrates the use of the profiles in all the steps of the information retrieval process. A profile corresponds to the user’s information need. It evolves along the search sessions based on query reformulation mechanisms. Profiles are memorized and shared by many users. Doing so, profile can be reused and improved by benefiting from researches of users concerned by the same information need. Our profile system illustrates a variant of the collaborative search. Mots-clés : recherche d'information, profil d’interrogation, profile d’identification, reformulation automatique, recherche collaborative permettre