Information generated by Public Administrations and public sector bodies is a key resource for the knowledge society, given its quality and variety. Most of the public sector information is reusable and can be used to generate new value-added products and services. In addition, the re-use of public sector information enables citizens to enhance their knowledge of public institutions’ activities, making them more transparent and accessible. The Spanish Ministry of Industry, Tourism and Commerce and the Ministry of the Presidency carry out the Aporta Project, an initiative designed to foster re-use of public sector information in Spain.