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Re: How can I mix GFDL and GPL sources?

Anthony DeRobertis wrote:
Gueven Bay wrote:
2) May I mix in one page a content of wikipedia(citation) and from
Debians development notes/files/artifacts - as I learned that the GFDL
and the GPL are incompatible? o_O

You probably can't mix GPL and GFDL materials (The GPL and GFDL both
demand you distribute under their own terms only, and you obviously
can't do both, since the terms are different).

Do they not require that you distribute with no further restrictions than what they restrict (the GFDL uses 'and that you add no other conditions whatsoever to those of this License', and the GPL uses 'You may not impose any further restrictions on the recipients' exercise of the rights granted herein'). The difference between requiring no further restrictions, and requiring identical terms being that they are fine with you granting additional permissions*.

If I'm right about this, a document licensed as 'The GFDL and/or GPL v2, at your option' by the copyright holder could be distributed by a third party under the GFDL, the GPL, or 'The GFDL and/or GPL v2, at your option'. (If I'm wrong about this, it may be the case that Mozilla FireFox is mis-licensed, as its source is made available under the GPL, MPL, and LGPL.)

* Though, of course, they don't grant you permission to grant additional permissions; only the copyright holder can do that.

Lewis Jardine

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