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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>The GNU General Public License v3.0 - GNU Project - Free Software Foundation</title>
</head>
<body>
<h3 style="text-align: center;">GNU GENERAL PUBLIC LICENSE</h3>
<p style="text-align: center;">Version 3, 29 June 2007</p>
<p>Copyright © 2007 Free Software Foundation, Inc.
<<a href="http://fsf.org/">http://fsf.org/</a>></p><p>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.</p>
<h3><a name="preamble"></a>Preamble</h3>
<p>The GNU General Public License is a free, copyleft license for
software and other kinds of works.</p>
<p>The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.</p>
<p>When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.</p>
<p>To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.</p>
<p>For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.</p>
<p>Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.</p>
<p>For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
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<p>Some devices are designed to deny users access to install or run
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stand ready to extend this provision to those domains in future versions
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<p>Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
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<p>The precise terms and conditions for copying, distribution and
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<h3><a name="terms"></a>TERMS AND CONDITIONS</h3>
<h4><a name="section0"></a>0. Definitions.</h4>
<p>“This License” refers to version 3 of the GNU General Public License.</p>
<p>“Copyright” also means copyright-like laws that apply to other kinds of
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<p>A “covered work” means either the unmodified Program or a work based
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<p>To “propagate” a work means to do anything with it that, without
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<p>To “convey” a work means any kind of propagation that enables other
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<p>An interactive user interface displays “Appropriate Legal Notices”
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<h4><a name="section1"></a>1. Source Code.</h4>
<p>The “source code” for a work means the preferred form of the work
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<h4><a name="section2"></a>2. Basic Permissions.</h4>
<p>All rights granted under this License are granted for the term of
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<h4><a name="section4"></a>4. Conveying Verbatim Copies.</h4>
<p>You may convey verbatim copies of the Program's source code as you
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keep intact all notices of the absence of any warranty; and give all
recipients a copy of this License along with the Program.</p>
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and you may offer support or warranty protection for a fee.</p>
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<p>You may convey a work based on the Program, or the modifications to
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<ul>
<li>a) The work must carry prominent notices stating that you modified
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License will therefore apply, along with any applicable section 7
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<p>A compilation of a covered work with other separate and independent
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beyond what the individual works permit. Inclusion of a covered work
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<h4><a name="section6"></a>6. Conveying Non-Source Forms.</h4>
<p>You may convey a covered work in object code form under the terms
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Corresponding Source from a network server at no charge.</li>
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<li>d) Convey the object code by offering access from a designated
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<p>A “User Product” is either (1) a “consumer product”, which means any
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<p>If you convey an object code work under this section in, or with, or
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<h4><a name="section7"></a>7. Additional Terms.</h4>
<p>“Additional permissions” are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
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this License without regard to the additional permissions.</p>
<p>When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part of
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<p>Notwithstanding any other provision of this License, for material you
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that material) supplement the terms of this License with terms:</p>
<ul>
<li>a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or</li>
<li>b) Requiring preservation of specified reasonable legal notices or
author attributions in that material or in the Appropriate Legal
Notices displayed by works containing it; or</li>
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</ul>
<p>All other non-permissive additional terms are considered “further
restrictions” within the meaning of section 10. If the Program as you
received it, or any part of it, contains a notice stating that it is
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a further restriction but permits relicensing or conveying under this
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of that license document, provided that the further restriction does
not survive such relicensing or conveying.</p>
<p>If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
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<p>Additional terms, permissive or non-permissive, may be stated in the
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the above requirements apply either way.</p>
<h4><a name="section8"></a>8. Termination.</h4>
<p>You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
modify it is void, and will automatically terminate your rights under
this License (including any patent licenses granted under the third
paragraph of section 11).</p>
<p>However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.</p>
<p>Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
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<p>Termination of your rights under this section does not terminate the
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<h4><a name="section9"></a>9. Acceptance Not Required for Having Copies.</h4>
<p>You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
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<h4><a name="section10"></a>10. Automatic Licensing of Downstream Recipients.</h4>
<p>Each time you convey a covered work, the recipient automatically
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any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.</p>
<h4><a name="section11"></a>11. Patents.</h4>
<p>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”.</p>
<p>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 modification of the contributor version. For
purposes of this definition, “control” includes the right to grant
patent sublicenses in a manner consistent with the requirements of
this License.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<p>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.</p>
<h4><a name="section12"></a>12. No Surrender of Others' Freedom.</h4>
<p>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.</p>
<h4><a name="section13"></a>13. Use with the GNU Affero General Public License.</h4>
<p>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 work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.</p>
<h4><a name="section14"></a>14. Revised Versions of this License.</h4>
<p>The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.</p>
<p>Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License “or any later version” applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.</p>
<p>If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.</p>
<p>Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.</p>
<h4><a name="section15"></a>15. Disclaimer of Warranty.</h4>
<p>THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.</p>
<h4><a name="section16"></a>16. Limitation of Liability.</h4>
<p>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.</p>
<h4><a name="section17"></a>17. Interpretation of Sections 15 and 16.</h4>
<p>If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.</p>
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