Each contributor grants you a non-exclusive,
worldwide, royalty-free patent license under
the contributor's essential patent claims, to
make, use, sell, offer for sale, import and
otherwise run, modify and propagate the
contents of its contributor version.
In the following three paragraphs, a “patent
license” is any express agreement or
commitment, however denominated, not
to enforce a patent (such as an express
permission to practice a patent or covenant
not to sue for patent infringement). To “grant”
such a patent license to a party means to
make such an agreement or commitment not
to enforce a patent against the party.
If you convey a covered work, knowingly
relying on a patent license, and the
Corresponding Source of the work is not
available for anyone to copy, free of charge
and under the terms of this License, through
a publicly available network server or other
readily accessible means, then you must
either (1) cause the Corresponding Source
to be so available, or (2) arrange to deprive
yourself of the benefit of the patent license
for this particular work, or (3) arrange, in a
manner consistent with the requirements of
this License, to extend the patent license to
downstream recipients. “Knowingly relying”
means you have actual knowledge that, but
for the patent license, your conveying the
covered work in a country, or your recipient's
use of the covered work in a country, would
infringe one or more identifiable patents in that
country that you have reason to believe are
valid.
If, pursuant to or in connection with a single
transaction or arrangement, you convey, or
propagate by procuring conveyance of, a
covered work, and grant a patent license to
some of the parties receiving the covered
work authorizing them to use, propagate,
modify or convey a specific copy of the
covered work, then the patent license you
grant is automatically extended to all
recipients of the covered work and works
based on it.
A patent license is “discriminatory” if it does
not include within the scope of its coverage,
prohibits the exercise of, or is conditioned
on the non-exercise of one or more of the
rights that are specifically granted under this
License. You may not convey a covered
work if you are a party to an arrangement
with a third party that is in the business of
distributing software, under which you make
payment to the third party based on the
extent of your activity of conveying the work,
and under which the third party grants, to any
of the parties who would receive the covered
work from you, a discriminatory patent license
(a) in connection with copies of the covered
work conveyed by you (or copies made
from those copies), or
(b) primarily for and in connection with specific
products or compilations that contain the
covered work, unless you entered into that
arrangement, or that patent license was
granted, prior to 28 March 2007.
Nothing in this License shall be construed
as excluding or limiting any implied license
or other defenses to infringement that may
otherwise be available to you under applicable
patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether
by court order, agreement or otherwise) that
contradict the conditions of this License, they
do not excuse you from the conditions of
this License. If you cannot convey a covered
work so as to satisfy simultaneously your
obligations under this License and any other
pertinent obligations, then as a consequence
you may not convey it at all. For example, if
you agree to terms that obligate you to collect
a royalty for further conveying from those
to whom you convey the Program, the only
way you could satisfy both those terms and
this License would be to refrain entirely from
conveying the Program.
13. Use with the GNU Affero General
Public License.
Notwithstanding any other provision of
this License, you have permission to link
or combine any covered work with a work
licensed under version 3 of the GNU Affero
General Public License into a single combined
