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Swiss Open Government Licence
There is not yet an “Open Government Data Swiss Licence” like the one found in UK:
http://www.nationalarchives.gov.uk/doc/open-government-licence/
CC BY
Nevertheless examples from other countries show that a Creative Commons Licence with mandatory data source specification could be a good starting point:
in English: http://creativecommons.org/licenses/by/3.0/
in French: http://creativecommons.org/licenses/by/3.0/deed.fr
APIE V2
“Agence du patrimoine immatériel de l'Etat” in France has defined the following licence (juin 2011):