[OSM-legal-talk] Reverse-Engineering Maps and Share-Alike Licences

[Rob Myers]

On Mon, Mar 9, 2009 at 3:24 PM, Gervase Markham <gerv-gmane at gerv.net> wrote:
> On 08/03/09 21:02, Frederik Ramm wrote:
>> Sure; but how likely is it that we'll still be at ODbL v1.0 at that
>> time? Since our license can be upgraded to "a later version", so can the
>> list of compatible SA licenses for Produced Works.
>
> We could; but not every SA license is well-known. For maximum
> compatibility and future-proofing, it would be better to have criteria.
> And I don't think that's unachievable. Something along the lines of:
>
> A license which:
> - preserves the freedoms to copy, share, modify and redistribute
> and
> - requires you to license derivative works under the same license.

That covers CC-BY-NC-SA. ;-)

I agree with Frederik that an explicit list of licences is the better
solution. CC are using this approach.

- Rob.