9. The method according to claim 1 , further comprising a step of establishing a user dependant list of semantic expressions retrieved from speech material related to the activities of the user, and using said list for adapting said user profile.
9. The method according to claim 1 , further comprising a step of establishing a user dependant list of semantic expressions retrieved from speech material related to the activities of the user, and using said list for adapting said user profile. 13. The method according to claim 9 , wherein said user profile depends on the rareness of said semantic expressions and/or on the context when they were retrieved.