The creation of the Bibliothèque nationale de France is a great plan by its architectural scale and the intellectual thinking sites it brings into play, and also by the human capital necessary to make it work. The result of the institution will be a function of the professionalism of its staff. The development of this professionalism will go through the definition of the professions and competencies necessary for the satisfaction of the publics of the future institution. The training at stake is in the acquisition of competencies. A coherent training program is necessary for this project not to spread out the energies. That is why thinking about training must be a preoccupation of the direction committee as well as thinking about computerization.