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Rapid advances in the digital technologies have profoundly changed and improved the way in which data, information and tools can be disseminated, managed, used and re-used in research, and have created new opportunities to speed up progress in science and innovation. These developments are mainly due to an emerging broader movement in support of formal and informal “peer production ” and global dissemination of information drawing on the cooperation of distributed science and knowledge communities working in open networked environments. Initiatives like the Science Commons rely on an economic model where science evolves in a digital environment, and more specifically on sharing and exchanges between peer communities as a basis for production. Many other initiatives of this kind are under way (e.g. ATLAS at the CERN in Geneva). We have chosen the Science Commons, whose objective, over and above scientific communication, is to speed up the translation of data into discovery by removing all barriers, including legal obstacles, that prevent society from enjoying the benefits of scientific results as quickly as possible. The philosophy and practical tools of the Science Commons are described as making up a resolutely open approach to scientific knowledge, as recommended by the Berlin Declaration (2003).