Am 11.03.2015 um 12:39 schrieb Jo Walsh:
http://wiki.openstreetmap.org/wiki/Wikidata#Importing_data *Copying data to Wikidata from OSM* (or even from other Wikimedia projects) *is not allowed* because Wikidata uses the public-domain style Creative Commons CC0 license which does not contain any attribution or share-alike provisions. Conversely, data may be copied from Wikidata without restriction.
(OSM is licensed under the Open Database License)
This applies to any copyrightable material. Facts ("this is a lighthouse") are not copyrightable.