On Thu, Jan 31, 2013 at 2:46 AM, Gervase Markham <g...@mozilla.org> wrote: > On 31/01/13 10:37, David Woolley wrote: >> In the case of GPL one is it mainly meeting the minimum requirements for >> establishing the copyright status of the file when used outside of the >> original application. Such re-use is fundamental to the GPL concept, >> even if many open source developers only think of their programs as ever >> being used as a whole. > > That's just not true. The entire _point_ of open source licenses is that > you can use the code without having to care who owns the copyright, > because the license under which they have released it gives you all the > rights you need.
With the GPL that's pretty much absolutely true. If someone modifies a GPL file and distributes it you can pretty safely assume that the derivative work is GPL licensed. As brought up in other parts of this thread there are things like work for hire that make that more difficult, but in general I'd say that the issue there is on the distributor not on the person relying on the license. However, we're not talking about the GPL here. We're talking about a forked version of the Apache Software License 2.0 that he wants to change the book keeping clause. Both ASL 2.0 and this new license do NOT require that your modifications be licensed under the same license. Resulting in the need to know if someone has modified the file for copyright purposes. If you don't know who modified the file, good luck trying to figure out what the license is on those modifications. I'd expect most of the time beyond just putting "Changed by Fred Bloggs" the notification is more along the lines of "Changed by Fred Bloggs and licensed under the ASL 2.0". That's not to say that if there is attribution and no explanation of the licensing that it'll be easy to find the person and get them to work with you. But at least you have a chance of doing it. _______________________________________________ License-discuss mailing list License-discuss@opensource.org http://projects.opensource.org/cgi-bin/mailman/listinfo/license-discuss
