| Psychoslave added a comment. |
Hi @Pintoch if a license is compatible with CC0 requirements, then yes it can be imported into any dataset covered by CC0, including Wikidata.
The link you are providing is a minutes of a workshop to which I attended. I think it's great that Etalab took such a clear position, all the more when I personally insisted to have such a clarification. I don't know how official that makes the statement, but at least it's here to be shown. Now I must say that, having re-red the the licence ouverte official text, I don't agree with this interpretation. The license explicitly states:
La présente licence a été conçue pour être compatible avec toute licence libre qui exige au moins la mention de paternité et notamment avec la version antérieure de la présente licence ainsi qu’ avec les licences « Open Government Licence » (OGL) du Royaume - Uni, « Creative Commons Attribution » (CC - BY) de Creative Commons et « Open Data Commons Attribution » (ODC - BY) de l’Open Knowledge F oundation.
That is, as it is effectively formulated, the license aims at compatibility with licenses which include an attribution clause. The license explicitly states that derived works should comes with a reference toward the source and the date at which it was retrieved. On the other hand, I don't see any mention of "this duty only holds for the first user" in the text of the license. So, maybe the Etalab interpretation is based on extra-license juridical considerations, but as far as I understand, if I want to import a dataset covered by the licence ouverte in an other one, I must provide at least a link toward the source and the date at which I performed the retrieval, and any derivative work should therefore do the same as for a work released under a CC-by license. To my mind the former is technically manageable within Wikidata, but the statement that Wikidata is released under CC0 breaks the later.
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