The one potential problem with the dual GPL and other license approach is that
you only have the right to license the code you originated. Once you have
something out in GPL, if other people make changes and you decide to incorporate
them in your codebase the result can *only* be distributed under GPL (unless you
get their permission for other licensing).
I think this is the reason most GPL code is only distributed as GPL. After the
initial version there's rarely a single author who has full and complete
copyright of the code and can therefore use any other form of distribution.
- Dennis
Justin Wells wrote:
>
> Software Copyright 101:
>
> If you write some software, you are the copyright holder and owner
> and no-one else has any rights to the software. You may choose to
> let someone else use it by granting them some rights as part of
> some license. Nothing stops you, the owner, from granting different
> rights to different people.
>
> I have chosen to grant the entire planet the right to use WebMacro
> under the terms of the GNU General Public License--for free. This
> GPL is just an ordinary license, and nothing stops me from releasing
> WebMacro under other licenses as well.
>
> The GPL allows you to use WebMacro for any purpose, without restriction,
> and for free. You can use it to run applications, develop software,
> deploy it on your webserver or intranet--all at no cost. You can
> even charge money for any of these.
>
> The GPL also entitles you to distribute WebMacro, or applications
> derived from WebMacro--but in this case there is a restriction. In
> particular, the distributed application must also be licensed to
> everyone on the planet under the GPL.
>
> All of this means you can use WebMacro for free, and you can also
> use it to create and distribute more free software.
>
> You can even charge money for distributing your software, but a
> commercial vendor would probably want to do so under a more restrictive
> license than the GPL.
>
> In that case you need to come to me, the owner, and request the right
> to distribute software under a restrictive proprietary right. I have
> worked out a number of alternatives, and they are available here:
>
> http://webmacro.org/License.html
>
> It's worth noting that everything I've said also applies to Linux,
> as distributed by RedHat, etc., since it'd also under the GPL.
>
> Justin
>
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