Here [1] you can download a report on the EU policy framework on open data, which includes some Commission Communications, the Directive on the re-use of Public Sector Information (PSI), the establishment of open data portals and some recommendations of international organizations on open data in public procurement.
Links
[1] http://www.woodie.unito.it/sites/www.woodie.unito.it/files/OpenData_D_2.1.pdf