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Is RA a GPL?
R is licensed as GPL 2, and most R packages are also GPL (whether 2 or 3). GPL is not a permissive license. It is categorized as “strongly protective”. In layman terms, if you build your work on a GPL program it may force you to license your product with a GPL license, too.
What is rheuma?
Rheumatoid arthritis is a chronic inflammatory disorder that can affect more than just your joints. In some people, the condition can damage a wide variety of body systems, including the skin, eyes, lungs, heart and blood vessels.
What does the GPL say about providing source?
If you choose to provide source through a written offer, then anybody who requests the source from you is entitled to receive it. If you commercially distribute binaries not accompanied with source code, the GPL says you must provide a written offer to distribute the source code later.
Can a module be released under the GPL?
The GPL says that the whole combined program has to be released under the GPL. So your module has to be available for use under the GPL. But you can give additional permission for the use of your code. You can, if you wish, release your module under a license which is more lax than the GPL but compatible with the GPL.
Do you need special permission to use the GNU GPL?
Yes, you do. “Fair use” is use that is allowed without any special permission. Since you don’t need the developers’ permission for such use, you can do it regardless of what the developers said about it—in the license or elsewhere, whether that license be the GNU GPL or any other free software license.
Can you sell a modified version of the GPL?
You are allowed to sell copies of the modified program commercially, but only under the terms of the GNU GPL. Thus, for instance, you must make the source code available to the users of the program as described in the GPL, and they must be allowed to redistribute and modify it as described in the GPL.