[OSM-talk] Dual/Multiple licencing

[Matt Amos]

On Mon, Dec 14, 2009 at 11:24 AM, Brendan Morley <morb.gis at beagle.com.au> wrote:
> Maybe I missed something in the discussion but...
>
> Why must there be migration to the new licence?

mainly because the current license doesn't work. that is; in some
jurisdictions it isn't able to enforce the attribution and share-alike
features that most people expect. that's not the only reason, and you
can find more information here:

http://www.osmfoundation.org/wiki/File:License_Proposal.pdf
http://www.osmfoundation.org/wiki/License/Why_CC_BY-SA_is_Unsuitable
http://wiki.openstreetmap.org/wiki/Open_Database_License

> Why can't we run both indefinitely?

for the same reason that, if your front door is broken and won't lock,
you don't just double-lock your back door ;-)

cheers,

matt