Hi Y'all, I'm trying to wrap my head around the "give-back" clause in ODbL, that is, the requirement to publish not only a produced work, but also the modified database, if modding the DB was part of creating the produced work.
"Share-Alike: If you publicly use any adapted version of this database, or works produced from an adapted database, you must also offer that adapted database under the ODbL." (I am trusting/hoping the human readable terms match the legalese.) So...my question is: how _useful_ does the derived database have to be? I understand that if I simply filter the planet extract (by keeping only ways with certain tags) I do need to publish the derived DB, but can do so by posting the source code I used to filter. I suppose that while this example is trivial, there could be database processing that is interesting enough to make this valuable to the community. But, what if I do something really rude like remove all of the node IDs? The derived database might have some very useful properties, but it will be a truly royal PITA to apply back to OSM. The result would be a sort of "dead patch" that meets legal requirements but can't be used. I ask not because I am looking for a clever way to make my diffs useless, but rather because a lot of the processing I do on the database _does_ strip off the identity information needed to produce diffs/patches. Yet another case of this: if I have a road editing program and I add .osm import to it, a re-export to "OSM format" might again be useless if the editing program hasn't tracked object identity for nodes, ways, etc. in a consistent manner. Does the ODbL require any "usefulness" to diffs, or only that the available database materials exactly match any temporary database used to create a produced work? cheers Ben -- Scenery Home Page: http://scenery.x-plane.com/ Scenery blog: http://xplanescenery.blogspot.com/ Plugin SDK: http://www.xsquawkbox.net/xpsdk/ X-Plane Wiki: http://wiki.x-plane.com/ Scenery mailing list: x-plane-scen...@yahoogroups.com Developer mailing list: x-plane-...@yahoogroups.com _______________________________________________ legal-talk mailing list legal-t...@openstreetmap.org http://lists.openstreetmap.org/listinfo/legal-talk
