Frederik Ramm <frederik@...> writes: >>It looks like with the release of CC 4.0 there may be two share-alike >>licenses suitable for data with different copyleft provisions. CC with a >>stronger copyleft and ODbL with a weaker one that allows produced works >>under a non-free license. > >I don't think it is as simple as that; the requirement to share the >derivative database that stands behind a produced work seems to be >"stronger" than what CC does.
The way I see it is that there are two ways to play. If you want to be fully open then you distribute your new work in data form so that it is easy for others to build on further. You distribute it as a Derivative Database, and under the exact same terms you received the input data. In that case the licence does not (or should not in my view) put any obstacles in your way. You are giving others exactly the same rights you yourself received, so you can just get on with your work and distribute the result without further hassle. However, for those who don't want to be quite so open, the ODbL has made a concession by allowing the concept of a Produced Work. Your resulting work does not have to be licensed under any particular terms. However, if you want to take advantage of this option, then it is your responsibility to publish the intermediate databases you used. The one thing that CC does allow which ODbL may or may not (depending on the legal definition of 'database') is to make a derived work which is much simpler in structure and publish it under the same terms you received the data, without disclosing anything further. For example, making a human-viewable map image from the computer-readable OSM map. I would argue that this can be done too in the ODbL case, by publishing your map tiles as Derivative Databases under the ODbL, since I've not seen anything to suggest that a raster image file is not also a database in law. But opinion differs on this point. I believe your example of a route planner producing directions is similar here: it is a much simpler work ('turn left, then right') derived from the larger map database. But certainly a set of directions is itself a database, as anyone who programmed LOGO knows. -- Ed Avis <e...@waniasset.com> _______________________________________________ legal-talk mailing list legal-talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk