ABSTRACT
Written scientific communication appears then as a multidimensional network of restrained or expanded groups which communicate amongst themselves and, increasingly, with the exterior by means of vulgarization. The resulting discourses are different depending on whether they circulate inside a restrained group where everybody knows each other and shares the same key information, or in larger groups, within the same speciality, or in even wider groups that relate to different specialities. When the key information is not shared entirely, the discourse has to be made more explicit.
