<https://joinup.ec.europa.eu/sites/default/files/document/2014-12/media2406.pdf>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/MediaObject>
<https://joinup.ec.europa.eu/collection/open-source-observatory-osor/document/es-open-source-software-development-spanish-public-administration>