On Fri, Aug 27, 2004 at 11:17:57PM -0400, Nathanael Nerode wrote: > Glenn Maynard asked: > >Is it valid to combine GPL work placed under "GPL version 2" with one > >under "GPL version 2 or any later version"? That is, do versioning > >choices impact compatibility (when the versions overlap)? Are all future > >modifications bound to give the same permission to upgrade the GPL? > > Yes, it's valid to combine them. The combined work, however, is effectively > GPL-version-2-only. No, future modifications do not have to give upgrade > permission. Ever -- you can take a "version 2 or later" program and put your > modifications under "version 2 only". (In fact, you can take a "version 1 or > later" program and put your modifications under "version 2 only", or under > "version 1 only".) > > This is pretty straightforward; the "version 2 or later" is a form of > dual-licensing (dual-licensed under version 2, version 3, etc.). > You pick which license you want to use. If you combine a work dual-licensed > under version 2 and version 3 with a work licensed only under version 2, you > have to use version 2.
I know all this; the question was debated for a while here, I asked the question in summary form to the FSF on behalf of the list, and it was answered. The answer is exactly as I'd expected (except for in a few brief moments of embarrassing confusion during the thread). You're replying to my forwarding of the official answer, repeating the answer as if it wasn't there. I can't imagine why, though I'm a little wary at the moment for a Nerode-flood of thirty such useless replies at once ... -- Glenn Maynard
