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GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright © 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this
license
document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for software
and other kinds of works.
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.
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.
To protect your rights, we need to prevent others from denying you these
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responsibilities if you distribute copies of the software, or if you modify it:
responsibilities to respect the freedom of others.
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.
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.
For the developers' and authors' protection, the GPL clearly explains that
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Some devices are designed to deny users access to install or run
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Therefore, we have designed this version of the GPL to prohibit the
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Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
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to avoid the special danger that patents applied to a free program could
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patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
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A "covered work" means either the unmodified Program or a work based
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there is no warranty for the work (except to the extent that warranties are
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1. Source Code.
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The Corresponding Source need not include anything that users can
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The Corresponding Source for a work in source code form is that same
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2. Basic Permissions.
All rights granted under this License are granted for the term of copyright
on the Program, and are irrevocable provided the stated conditions are
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unmodified Program. The output from running a covered work is covered
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equivalent, as provided by copyright law.
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terms of this License in conveying all material for which you do not
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you must do so exclusively on your behalf, under your direction and
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Conveying under any other circumstances is permitted solely under the
conditions stated below. Sublicensing is not allowed; section 10 makes it
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3. Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article 11 of
the WIPO copyright treaty adopted on 20 December 1996, or similar
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When you convey a covered work, you waive any legal power to forbid
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