[OSM-legal-talk] License compatibility clarification

[John Smith]

On 25 June 2011 06:37, Ed Avis <eda at waniasset.com> wrote:
> Jonas Häggqvist <rasher at ...> writes:
>
>>Is the CT/ODbL compatible with CC-BY-SA?
>>
>>Say if an organization releases some data under CC-BY-SA, could we use it
>>(in the CT/ODbL future)?
>
> If this were possible, then there would be no need for any relicensing exercise.
> The data released under CC-BY-SA would be the existing OSM map, and it could
> just be used directly with CT/ODbL.
>
> The fact that this is not happening shows that, as generally believed, it is not
> possible to accept CC-BY-SA licensed data under a CT/ODbL regime.

ODBL has no minimum license that produced works can be placed under,
so the only licenses compatible with ODBL are PD/CC0