Free licenses and warranties
[Posted May 7, 2003 by corbet]
Releasing a work - be it code, words, sounds, or images - under a free
license is not just a matter of tossing in a file called COPYING and
putting up a tarball. It is a legal decision which may have long-term
implications. For an example, consider
this discussion
on the warranty provisions of the Creative Commons licenses.
The Creative Commons offers several licenses
to fit different people's
wishes regarding attribution, commercial use, and derived works. They
range from being very GPLish, to something that looks vaguely like the BSD
license (though rather more complicated), to others that would not be
considered "free" by most in the community. One thing they have in common,
however, is a fairly strong warranty provision:
By offering the Work for public release under this License,
Licensor represents and warrants that, to the best of Licensor's
knowledge after reasonable inquiry:
- Licensor has secured all rights in the Work necessary to grant
the license rights hereunder and to permit the lawful exercise
of the rights granted hereunder without You having any
obligation to pay any royalties, compulsory license fees,
residuals or any other payments;
- The Work does not infringe the copyright, trademark, publicity
rights, common law rights or any other right of any third party
or constitute defamation, invasion of privacy or other tortious
injury to any third party.
In other words, when you release a work under a Creative Commons license,
you are making a promise to any potential user that nobody else has any
rights to that work that could require payments from that user. This is a
warranty: should a third party come to one of your users for royalties
or damages, they can come back to you. Releasing a work under one of these
licenses means taking on a legal liability.
This feature of the Creative Commons licenses is deliberate: it is intended
to give users of CC-licensed works confidence that they can truly
use and redistribute those works without getting into trouble. This sort
of language is not uncommon; anybody who has had a book published, for
example, has signed off on a warranty that is at least as strong as the CC
licenses require. But some authors who release under a CC license may not
understand the commitment that they are making. The Creative Commons folks
will apparently be making some changes to make the warranty commitment more
clear.
What about other licenses? The GNU General Public License
is clear that the covered works come (in capital letters) "WITHOUT WARRANTY
OF ANY KIND." Other common licenses, including the Apache Public
License, the Artistic
License, the BSD License,
the Mozilla
Public License, and others all include warranty disclaimers. The Open Software
License, instead, reads:
Licensor warrants that the copyright in and to the Original Work is
owned by the Licensor or that the Original Work is distributed by
Licensor under a valid current license from the copyright owner.
In other words, authors using the OSL are taking on a warranty obligation.
The GNU Free Documentation
License, interestingly, states only that any warranty disclaimers must
be preserved. Authors releasing under that license should probably add an
explicit statement of their warranty position.
Of course, no warranty disclaimers will keep you out of trouble if a
litigious third party decides that you are distributing their intellectual
property. For example, should SCO manage to prove in court that the famous
"printer on fire" kernel message was stolen by IBM and placed in the Linux
kernel, the fact that the relevant code was released under the GPL (if it
was) will prevent other Linux distributors from suing IBM, but will it not
help against SCO.
Regardless of disclaimers, anybody distributing material under a free
license had better be sure that they have the right to do so. Once that is
done, however, it is worth being aware of just what sort of warranty you
are promising people who are making free use of your work.
(
Log in to post comments)