This article questions the place of "thinking, classifying, categorizing" in the construction of knowledge. From Culture of Information to Information Culture, a reconfiguration of informational knowledge is taking place, in a cumulative movement, from "thinking, classifying, categorizing", experienced in an individual mode, to "participating, confronting, sharing", experienced in a more collective and communicational mode. The two cultures of "information" and "informational" are first characterized, and their markers identified (convergence around the entry "culture"; specificities: two registers in the approach to information-documentation); then the integrative/inclusive dynamics of the evolutions underway, at the time of web 2 and networks, are considered: reference to the "informational", defined as a relation, a belonging, an "introduction to a world"; idea of empowerment, revisited in a more social, if not citizen, sernse. (50 references)