Subject: Re: Can OSI specify that public domain is open source?
From: John Cowan <cowan@mercury.ccil.org>
Date: Wed, 7 Sep 2011 18:20:15 -0400

Karl Fogel scripsit:

> No, not at all.  A file can contain *multiple* copyright notices,
> each applying to different sections.  There's nothing magical about a
> single header at the top of a file.

What is more, if you publish a modified version of a BSD work under the
GPL, attaching a GPL license, you must strictly speaking attach the BSD
license as well, even though it has no legal effect.  This is why Python
has a long tail of licenses today: only the top license is effective.

-- 
Knowledge studies others / Wisdom is self-known;      John Cowan
Muscle masters brothers / Self-mastery is bone;       cowan@ccil.org
Content need never borrow / Ambition wanders blind;   http://ccil.org/~cowan
Vitality cleaves to the marrow / Leaving death behind.    --Tao 33 (Bynner)