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Date:      Tue, 3 Jul 2001 19:02:22 +0200
From:      Rahul Siddharthan <rsidd@physics.iisc.ernet.in>
To:        Wes Peters <wes@softweyr.com>
Cc:        j mckitrick <jcm@FreeBSD-uk.eu.org>, Giorgos Keramidas <keramida@ceid.upatras.gr>, Dirk Myers <dirkm@teleport.com>, freebsd-advocacy@FreeBSD.ORG
Subject:   Re: BSD, .Net comments - any reponse to this reasoning?
Message-ID:  <20010703190222.D40756@lpt.ens.fr>
In-Reply-To: <3B41F0E4.B55E6937@softweyr.com>; from wes@softweyr.com on Tue, Jul 03, 2001 at 10:20:52AM -0600
References:  <20010630174743.A85268@dogma.freebsd-uk.eu.org> <20010630173455.T344@teleport.com> <20010701032900.A93049@dogma.freebsd-uk.eu.org> <20010701132353.W344@teleport.com> <20010702152649.A18127@dogma.freebsd-uk.eu.org> <20010702180222.A2667@hades.hell.gr> <20010702161055.A18543@dogma.freebsd-uk.eu.org> <20010702172448.I4896@lpt.ens.fr> <3B41F0E4.B55E6937@softweyr.com>

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Wes Peters said on Jul  3, 2001 at 10:20:52:
> 
> A complication for open source projects: if you have accepted contributions
> of code (bug fixes, new features, etc) from others, and have not specified
> that all contributions become your property, you may not be able to issue
> the code under a new license without getting the permission of all of the
> contributors.  This is why the FSF asks for copyright assignment for the GNU
> tools; it allows them to control (prevent) the issuance of the code under
> other licenses.  

Actually, if multiple people hold copyright, a license change can be
made only if all copyright holders agree.  If the FSF holds the
copyright to a part of the code, that's enough to prevent license
changes, in theory.

The official reason for the copyright transfer policy is they think it
is easier to enforce legally if the copyright status of the program is
simple.  (That is, it is easier in court to represent one copyright
holder than a hundred.  And there may be a legal problem with the
latter, for example proving in court that all of them agree with you.)

See, for example, 
  http://www.gnu.org/copyleft/gpl-faq.html#AssignCopyright
  http://www.gnu.org/copyleft/why-assign.html

- Rahul.

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