[OSM-legal-talk] sharealike trigger

John Bazik jbazik at gmail.com
Mon Jul 22 05:18:59 UTC 2013

On Sun, Jul 14, 2013 at 11:16:42PM -0700, Mikel Maron wrote:
> Maybe a clarification to the "Fairhurst Doctrine", which is that the trigger is pulled if the database referencing an osm foreign key contains "substantial" data that could be in OSM itself. For instance, we don't want restaurant reviews in OSM, but do want routes in some cases.

What consitutes substantial?  I've read many threads on this, but I find
myself no more able to determine what that might be.  And the sharealike
trigger is pulled whether the substantial data is already in OSM or
isn't, but "could be."  Technically, any data that references an OSM
foreign key could be in OSM.

Routes, "in some cases," are of interest.  What if the only meta
information associated with routes is the users of another service
and their opinions?  Giving up user account information is obviously
problematic for any organization, commercial or non-profit.

I fear the definition of a derivative work is akin to Justice Potter's
famous construction, "I know it when I see it."


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