Partial OpenSource products/licenses?

Lewis Collard lewis at
Wed Oct 2 17:19:56 UTC 2002

John Cowan:
> That way lies great pain and suffering for everyone.
> Instead, I recommend you use the Mozilla Public License, and have two versions
> of your product.  "ProductX Open" is fully open source under the MPL, which
> basically allows people to create closed-source derivatives as long as they
> reveal actual patches to the source (as opposed to additions).  "ProductX
> Gold" is a derivative of ProductX Open, but is closed-source.  By using
> the Netscape modification to the MPL (see the NPL), you can have patches
> submitted to ProductX Open made reusable in ProductX Gold as well.

Couldn't you use the GPL too for this purpose? If you are the copyright
holder for the entire code is there anything stopping you from releasing
modified versions under different licenses?

	-- Lewis
Lewis Collard <lewis at>
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