The European Data Forum 2012 (EDF2012) will offer a platform for industry, research, policy-makers and community initiatives to discuss the challenges of Big Data and the emerging Data Economy and to develop suitable action plans for addressing these challenges. Small and Medium-sized Enterprises (SMEs) will be given a particular focus, as they are driving innovation and competition in many economic sectors. Topics discussed will range from novel, data-driven business models (e.g. data clearing houses), to technological innovations (e.g. Linked Data Web) and societal aspects (e.g. open government data as well as data privacy and security).