Cognitive capitalism has two main characteristics, collective intelligence and the intensive use of information technology, based on the digitization of content, procedures and writings. In this paper, we try to examine the Open Data movement faced with the transformation of collective intelligence. We analyze this process in the context of public policy, science, intelligence software. We show how this movement articulates with the issue of semantic web ontologies and with the rise of algorithmic. We emphasize, indirectly but strong, on the emergence of "data mining" as "imperial narrative," as the story of performative societies in the context of anthropological stratum Internet. We outline the possibility of new modes of governance and the emergence of new ways of thinking about politics and public space. The future of democratic societies is partly at stake
