[OSM-legal-talk] Compatibility of new license with old

[Rob Myers]

On 08/27/2010 04:43 AM, jamesmikedupont at googlemail.com wrote:
> Hello,
>
> I would like to know if the new license is compatible with the old one.
> will we be able to use CC-SA-2.0 licensed data or we will have to get
> new contracts with the donators of data?
> for example, we have gotten much of the data for Kosovo donated under
> written contract for CC-SA-20, many users helped import this data into
> osm.
> even if those users agree to relicense, it does not mean that the
> original data can be relicensed.

(I am not a lawyer, this is not legal advice.)

The new licence is incompatible with the old. BY-SA 2.0 data cannot be 
placed under it without the rightsholder agreeing to relicence.

But the new licence is more compatible with other licences (including 
the old) where you want to produce "mash ups" and other works that 
combine data from more than one source.

- Rob.