[OSM-legal-talk] data derived from UK Ordnace Survey

[Richard Fairhurst]

Robert Whittaker wrote:
> A major purpose of the CTs is to ensure that all the data 
> remaining in OSM is suitable for re-licensing under any "Free 
> and Open" license without the need for further checks.

No, that hasn't been the case since Contributor Terms 1.2 were proposed in
November 2010 and subsequently adopted.

1.2.x say: "If you contribute Contents, You are indicating that, as far as
You know, You have the right to authorize OSMF to use and distribute those
Contents under our _current_ licence terms" (my emphasis).

In the event of a future relicensing, LWG and the community would need to
check existing data and delete it if so. The minutes of LWG at the time
confirm that this is the intention. (I would agree, however, that it is
perhaps not as clearly worded as it could be.)

Therefore if ODbL is compatible with OGL/OS, which I believe it is, then
OS-derived contributions can be relicensed under ODbL+CT. Only if OSM moves
to (say) a non-attribution licence do they have to be removed.

cheers
Richard



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