Brendan Morley wrote: > Why must there be migration to the new licence? Why can't we run both > indefinitely?
A major reason for introducing ODbL is that many believe CC-by-SA to only inadequately protect our data (so that it might be possible in some jurisdictions to use our data without respecting attribution and share-alike requirements). If we dual-license, someone with the intention to take our data can simply pick the "weaker" license, so this wouldn't help at all. Adopting a dual-licensing scheme would also require us to remove data added by contributors who don't agree to this change, just like switching to ODbL (unless we want to create two different sets of data and essentially fork the project, which imo is the least attractive option of all). And finally, it would become impossible to re-import modified information from uncooperative users. In order to do this, we'd need permission to distribute it under both licenses, but a user can of course decide to only publish modifications under one of the two licenses. Tobias Knerr _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
