[cad-linux] Re: CADCAM: TomCad/Grpahite One/GPL: I'm confused

On Tue, 2003-06-03 at 16:40, Thomas Schmidt wrote:
> With a new release, a licence can change. For the software I use, I have =
> licences. This even includes a Qt licence.

As the author and copyright holder of your own software you can do pretty 
much whatever. This includes releasing under different licenses 
simultaneously (it's in the GPL documentation). From what I understand, a 
good example of this is The MySQL people who do a GPL and a commercial 
license depending on what people want e.g. if a company wants to use the 
code to develop their own product and not be affected by the GPL they can 
buy a commercial license from MySQL AB and not have to release their 
resulting source code.

You could, for instance, write a GPL program and then turn it completely 
closed source with the next release, but everyone who downloaded the 
previous version you released under the GPL could keep going on to 
develop their own GPL versions based on your old code which you 
supplied under the old and still valid license for that release.

Guy

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