Subject: Re: The GPL is "inherited"
From: Richard Stallman <rms@gnu.org>
Date: Wed, 29 Sep 1999 02:26:44 -0600 (MDT)

    Besides "unmodified versions", it would be nice to allow for

    1. Certification programs. Comply 100% with my API and pass my
       regression test, and then you get to use my certification mark.

    2. Revenue licensing. Pay the author something and get to use the mark.

I think that the plans I have in mind for trademarks and the GPL
are compatible with both of these approaches.