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You may not impose any further restrictions on the exercise of the rights granted or armed
under this License. For example, you may not impose a license fee, royalty, or other charge
for exercise of rights granted under this License, and you may not initiate litigation (including
a cross-claim or counterclaim in a lawsuit) alleging that any patent claim is infringed by
making, using, selling, oering for sale, or importing the Program or any portion of it.
11. Patents.
A “contributor” is a copyright holder who authorizes use under this License of the Program or
a work on which the Program is based. The work thus licensed is called the contributor's
“contributor version”.
A contributor's “essential patent claims” are all patent claims owned or controlled by the
contributor, whether already acquired or hereafter acquired, that would be infringed by some
manner, permitted by this License, of making, using, or selling its contributor version, but do
not include claims that would be infringed only as a consequence of further modication of
the contributor version. For purposes of this denition, “control” includes the right to grant
patent sublicenses in a manner consistent with the requirements of this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the
contributor's essential patent claims, to make, use, sell, oer 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 benet 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 identiable 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 specic 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 specically 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 specic products or compilations that