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‎GPL.md

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# GNU GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 [Free Software Foundation, Inc.](http://fsf.org/)
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Everyone is permitted to copy and distribute verbatim copies of this license
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document, but changing it is not allowed.
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## Preamble
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The GNU General Public License is a free, copyleft license for software and
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other kinds of works.
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The licenses for most software and other practical works are designed to take
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away your freedom to share and change the works. By contrast, the GNU General
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Public License is intended to guarantee your freedom to share and change all
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versions of a program--to make sure it remains free software for all its users.
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We, the Free Software Foundation, use the GNU General Public License for most
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of our software; it applies also to any other work released this way by its
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authors. You can apply it to your programs, too.
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When we speak of free software, we are referring to freedom, not price. Our
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General Public Licenses are designed to make sure that you have the freedom to
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distribute copies of free software (and charge for them if you wish), that you
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receive source code or can get it if you want it, that you can change the
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software or use pieces of it in new free programs, and that you know you can do
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these things.
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To protect your rights, we need to prevent others from denying you these rights
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or asking you to surrender the rights. Therefore, you have certain
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responsibilities if you distribute copies of the software, or if you modify it:
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responsibilities to respect the freedom of others.
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For example, if you distribute copies of such a program, whether gratis or for
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a fee, you must pass on to the recipients the same freedoms that you received.
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You must make sure that they, too, receive or can get the source code. And you
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must show them these terms so they know their rights.
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Developers that use the GNU GPL protect your rights with two steps:
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1. assert copyright on the software, and
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2. offer you this License giving you legal permission to copy, distribute
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and/or modify it.
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For the developers' and authors' protection, the GPL clearly explains that
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there is no warranty for this free software. For both users' and authors' sake,
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the GPL requires that modified versions be marked as changed, so that their
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problems will not be attributed erroneously to authors of previous versions.
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Some devices are designed to deny users access to install or run modified
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versions of the software inside them, although the manufacturer can do so. This
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is fundamentally incompatible with the aim of protecting users' freedom to
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change the software. The systematic pattern of such abuse occurs in the area of
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products for individuals to use, which is precisely where it is most
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unacceptable. Therefore, we have designed this version of the GPL to prohibit
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the practice for those products. If such problems arise substantially in other
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domains, we stand ready to extend this provision to those domains in future
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versions of the GPL, as needed to protect the freedom of users.
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Finally, every program is threatened constantly by software patents. States
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should not allow patents to restrict development and use of software on
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general-purpose computers, but in those that do, we wish to avoid the special
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danger that patents applied to a free program could make it effectively
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proprietary. To prevent this, the GPL assures that patents cannot be used to
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render the program non-free.
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The precise terms and conditions for copying, distribution and modification
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follow.
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## TERMS AND CONDITIONS
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### 0. Definitions.
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*This License* refers to version 3 of the GNU General Public License.
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*Copyright* also means copyright-like laws that apply to other kinds of works,
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such as semiconductor masks.
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*The Program* refers to any copyrightable work licensed under this License.
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Each licensee is addressed as *you*. *Licensees* and *recipients* may be
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individuals or organizations.
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To *modify* a work means to copy from or adapt all or part of the work in a
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fashion requiring copyright permission, other than the making of an exact copy.
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The resulting work is called a *modified version* of the earlier work or a work
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*based on* the earlier work.
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A *covered work* means either the unmodified Program or a work based on the
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Program.
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To *propagate* a work means to do anything with it that, without permission,
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would make you directly or secondarily liable for infringement under applicable
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copyright law, except executing it on a computer or modifying a private copy.
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Propagation includes copying, distribution (with or without modification),
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making available to the public, and in some countries other activities as well.
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To *convey* a work means any kind of propagation that enables other parties to
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make or receive copies. Mere interaction with a user through a computer
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network, with no transfer of a copy, is not conveying.
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An interactive user interface displays *Appropriate Legal Notices* to the
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extent that it includes a convenient and prominently visible feature that
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1. displays an appropriate copyright notice, and
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2. tells the user that there is no warranty for the work (except to the
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extent that warranties are provided), that licensees may convey the work
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under this License, and how to view a copy of this License.
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If the interface presents a list of user commands or options, such as a menu, a
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prominent item in the list meets this criterion.
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### 1. Source Code.
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The *source code* for a work means the preferred form of the work for making
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modifications to it. *Object code* means any non-source form of a work.
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A *Standard Interface* means an interface that either is an official standard
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defined by a recognized standards body, or, in the case of interfaces specified
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for a particular programming language, one that is widely used among developers
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working in that language.
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The *System Libraries* of an executable work include anything, other than the
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work as a whole, that (a) is included in the normal form of packaging a Major
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Component, but which is not part of that Major Component, and (b) serves only
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to enable use of the work with that Major Component, or to implement a Standard
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Interface for which an implementation is available to the public in source code
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form. A *Major Component*, in this context, means a major essential component
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(kernel, window system, and so on) of the specific operating system (if any) on
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which the executable work runs, or a compiler used to produce the work, or an
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object code interpreter used to run it.
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The *Corresponding Source* for a work in object code form means all the source
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code needed to generate, install, and (for an executable work) run the object
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code and to modify the work, including scripts to control those activities.
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However, it does not include the work's System Libraries, or general-purpose
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tools or generally available free programs which are used unmodified in
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performing those activities but which are not part of the work. For example,
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Corresponding Source includes interface definition files associated with source
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files for the work, and the source code for shared libraries and dynamically
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linked subprograms that the work is specifically designed to require, such as
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by intimate data communication or control flow between those subprograms and
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other parts of the work.
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The Corresponding Source need not include anything that users can regenerate
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automatically from other parts of the Corresponding Source.
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The Corresponding Source for a work in source code form is that same work.
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### 2. Basic Permissions.
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All rights granted under this License are granted for the term of copyright on
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the Program, and are irrevocable provided the stated conditions are met. This
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License explicitly affirms your unlimited permission to run the unmodified
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Program. The output from running a covered work is covered by this License only
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if the output, given its content, constitutes a covered work. This License
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acknowledges your rights of fair use or other equivalent, as provided by
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copyright law.
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You may make, run and propagate covered works that you do not convey, without
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conditions so long as your license otherwise remains in force. You may convey
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covered works to others for the sole purpose of having them make modifications
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exclusively for you, or provide you with facilities for running those works,
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provided that you comply with the terms of this License in conveying all
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material for which you do not control copyright. Those thus making or running
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the covered works for you must do so exclusively on your behalf, under your
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direction and control, on terms that prohibit them from making any copies of
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your copyrighted material outside their relationship with you.
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Conveying under any other circumstances is permitted solely under the
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conditions stated below. Sublicensing is not allowed; section 10 makes it
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unnecessary.
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### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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No covered work shall be deemed part of an effective technological measure
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under any applicable law fulfilling obligations under article 11 of the WIPO
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copyright treaty adopted on 20 December 1996, or similar laws prohibiting or
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restricting circumvention of such measures.
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When you convey a covered work, you waive any legal power to forbid
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circumvention of technological measures to the extent such circumvention is
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effected by exercising rights under this License with respect to the covered
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work, and you disclaim any intention to limit operation or modification of the
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work as a means of enforcing, against the work's users, your or third parties'
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legal rights to forbid circumvention of technological measures.
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### 4. Conveying Verbatim Copies.
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You may convey verbatim copies of the Program's source code as you receive it,
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in any medium, provided that you conspicuously and appropriately publish on
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each copy an appropriate copyright notice; keep intact all notices stating that
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this License and any non-permissive terms added in accord with section 7 apply
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to the code; keep intact all notices of the absence of any warranty; and give
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all recipients a copy of this License along with the Program.
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You may charge any price or no price for each copy that you convey, and you may
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offer support or warranty protection for a fee.
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### 5. Conveying Modified Source Versions.
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You may convey a work based on the Program, or the modifications to produce it
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from the Program, in the form of source code under the terms of section 4,
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provided that you also meet all of these conditions:
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- a) The work must carry prominent notices stating that you modified it, and
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giving a relevant date.
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- b) The work must carry prominent notices stating that it is released under
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this License and any conditions added under section 7. This requirement
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modifies the requirement in section 4 to *keep intact all notices*.
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- c) You must license the entire work, as a whole, under this License to
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anyone who comes into possession of a copy. This License will therefore
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apply, along with any applicable section 7 additional terms, to the whole
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of the work, and all its parts, regardless of how they are packaged. This
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License gives no permission to license the work in any other way, but it
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does not invalidate such permission if you have separately received it.
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- d) If the work has interactive user interfaces, each must display
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Appropriate Legal Notices; however, if the Program has interactive
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interfaces that do not display Appropriate Legal Notices, your work need
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not make them do so.
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A compilation of a covered work with other separate and independent works,
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which are not by their nature extensions of the covered work, and which are not
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combined with it such as to form a larger program, in or on a volume of a
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storage or distribution medium, is called an *aggregate* if the compilation and
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its resulting copyright are not used to limit the access or legal rights of the
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compilation's users beyond what the individual works permit. Inclusion of a
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covered work in an aggregate does not cause this License to apply to the other
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parts of the aggregate.
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### 6. Conveying Non-Source Forms.
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You may convey a covered work in object code form under the terms of sections 4
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and 5, provided that you also convey the machine-readable Corresponding Source
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under the terms of this License, in one of these ways:
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- a) Convey the object code in, or embodied in, a physical product (including
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a physical distribution medium), accompanied by the Corresponding Source
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fixed on a durable physical medium customarily used for software
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interchange.
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- b) Convey the object code in, or embodied in, a physical product (including
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a physical distribution medium), accompanied by a written offer, valid for
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at least three years and valid for as long as you offer spare parts or
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customer support for that product model, to give anyone who possesses the
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object code either
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1. a copy of the Corresponding Source for all the software in the product
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that is covered by this License, on a durable physical medium
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customarily used for software interchange, for a price no more than your
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reasonable cost of physically performing this conveying of source, or
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2. access to copy the Corresponding Source from a network server at no
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charge.
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- c) Convey individual copies of the object code with a copy of the written
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offer to provide the Corresponding Source. This alternative is allowed only
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occasionally and noncommercially, and only if you received the object code
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with such an offer, in accord with subsection 6b.
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- d) Convey the object code by offering access from a designated place
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(gratis or for a charge), and offer equivalent access to the Corresponding
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Source in the same way through the same place at no further charge. You
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need not require recipients to copy the Corresponding Source along with the
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object code. If the place to copy the object code is a network server, the
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Corresponding Source may be on a different server operated by you or a
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third party) that supports equivalent copying facilities, provided you
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maintain clear directions next to the object code saying where to find the
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Corresponding Source. Regardless of what server hosts the Corresponding
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Source, you remain obligated to ensure that it is available for as long as
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needed to satisfy these requirements.
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- e) Convey the object code using peer-to-peer transmission, provided you
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inform other peers where the object code and Corresponding Source of the
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work are being offered to the general public at no charge under subsection
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6d.
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A separable portion of the object code, whose source code is excluded from the
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Corresponding Source as a System Library, need not be included in conveying the
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object code work.
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A *User Product* is either
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1. a *consumer product*, which means any tangible personal property which is
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normally used for personal, family, or household purposes, or
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2. anything designed or sold for incorporation into a dwelling.
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In determining whether a product is a consumer product, doubtful cases shall be
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resolved in favor of coverage. For a particular product received by a
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particular user, *normally used* refers to a typical or common use of that
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class of product, regardless of the status of the particular user or of the way
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in which the particular user actually uses, or expects or is expected to use,
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the product. A product is a consumer product regardless of whether the product
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has substantial commercial, industrial or non-consumer uses, unless such uses
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represent the only significant mode of use of the product.
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*Installation Information* for a User Product means any methods, procedures,
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authorization keys, or other information required to install and execute
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modified versions of a covered work in that User Product from a modified
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version of its Corresponding Source. The information must suffice to ensure
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that the continued functioning of the modified object code is in no case
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prevented or interfered with solely because modification has been made.
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If you convey an object code work under this section in, or with, or
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specifically for use in, a User Product, and the conveying occurs as part of a
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transaction in which the right of possession and use of the User Product is
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transferred to the recipient in perpetuity or for a fixed term (regardless of
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how the transaction is characterized), the Corresponding Source conveyed under
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this section must be accompanied by the Installation Information. But this
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requirement does not apply if neither you nor any third party retains the
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ability to install modified object code on the User Product (for example, the
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work has been installed in ROM).
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The requirement to provide Installation Information does not include a
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requirement to continue to provide support service, warranty, or updates for a
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work that has been modified or installed by the recipient, or for the User
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Product in which it has been modified or installed. Access to a network may be
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denied when the modification itself materially and adversely affects the
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operation of the network or violates the rules and protocols for communication
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across the network.
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Corresponding Source conveyed, and Installation Information provided, in accord
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with this section must be in a format that is publicly documented (and with an
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implementation available to the public in source code form), and must require
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no special password or key for unpacking, reading or copying.
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### 7. Additional Terms.
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*Additional permissions* are terms that supplement the terms of this License by
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making exceptions from one or more of its conditions. Additional permissions
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that are applicable to the entire Program shall be treated as though they were
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included in this License, to the extent that they are valid under applicable
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law. If additional permissions apply only to part of the Program, that part may
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be used separately under those permissions, but the entire Program remains
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governed by this License without regard to the additional permissions.
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When you convey a copy of a covered work, you may at your option remove any
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additional permissions from that copy, or from any part of it. (Additional
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permissions may be written to require their own removal in certain cases when
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you modify the work.) You may place additional permissions on material, added
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by you to a covered work, for which you have or can give appropriate copyright
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permission.
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Notwithstanding any other provision of this License, for material you add to a
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covered work, you may (if authorized by the copyright holders of that material)
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supplement the terms of this License with terms:
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- a) Disclaiming warranty or limiting liability differently from the terms of
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sections 15 and 16 of this License; or
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- b) Requiring preservation of specified reasonable legal notices or author
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attributions in that material or in the Appropriate Legal Notices displayed
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by works containing it; or
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- c) Prohibiting misrepresentation of the origin of that material, or
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requiring that modified versions of such material be marked in reasonable
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ways as different from the original version; or
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- d) Limiting the use for publicity purposes of names of licensors or authors
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of the material; or
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- e) Declining to grant rights under trademark law for use of some trade
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names, trademarks, or service marks; or
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- f) Requiring indemnification of licensors and authors of that material by
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anyone who conveys the material (or modified versions of it) with
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contractual assumptions of liability to the recipient, for any liability
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that these contractual assumptions directly impose on those licensors and
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authors.
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All other non-permissive additional terms are considered *further restrictions*
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within the meaning of section 10. If the Program as you received it, or any
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part of it, contains a notice stating that it is governed by this License along
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with a term that is a further restriction, you may remove that term. If a
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license document contains a further restriction but permits relicensing or
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conveying under this License, you may add to a covered work material governed
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by the terms of that license document, provided that the further restriction
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does not survive such relicensing or conveying.
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If you add terms to a covered work in accord with this section, you must place,
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in the relevant source files, a statement of the additional terms that apply to
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those files, or a notice indicating where to find the applicable terms.
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Additional terms, permissive or non-permissive, may be stated in the form of a
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separately written license, or stated as exceptions; the above requirements
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apply either way.
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### 8. Termination.
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You may not propagate or modify a covered work except as expressly provided
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under this License. Any attempt otherwise to propagate or modify it is void,
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and will automatically terminate your rights under this License (including any
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patent licenses granted under the third paragraph of section 11).
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However, if you cease all violation of this License, then your license from a
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particular copyright holder is reinstated
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- a) provisionally, unless and until the copyright holder explicitly and
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finally terminates your license, and
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- b) permanently, if the copyright holder fails to notify you of the
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violation by some reasonable means prior to 60 days after the cessation.
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Moreover, your license from a particular copyright holder is reinstated
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permanently if the copyright holder notifies you of the violation by some
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reasonable means, this is the first time you have received notice of violation
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of this License (for any work) from that copyright holder, and you cure the
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violation prior to 30 days after your receipt of the notice.
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Termination of your rights under this section does not terminate the licenses
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of parties who have received copies or rights from you under this License. If
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your rights have been terminated and not permanently reinstated, you do not
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qualify to receive new licenses for the same material under section 10.
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### 9. Acceptance Not Required for Having Copies.
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You are not required to accept this License in order to receive or run a copy
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of the Program. Ancillary propagation of a covered work occurring solely as a
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consequence of using peer-to-peer transmission to receive a copy likewise does
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not require acceptance. However, nothing other than this License grants you
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permission to propagate or modify any covered work. These actions infringe
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copyright if you do not accept this License. Therefore, by modifying or
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propagating a covered work, you indicate your acceptance of this License to do
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so.
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### 10. Automatic Licensing of Downstream Recipients.
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Each time you convey a covered work, the recipient automatically receives a
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license from the original licensors, to run, modify and propagate that work,
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subject to this License. You are not responsible for enforcing compliance by
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third parties with this License.
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An *entity transaction* is a transaction transferring control of an
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organization, or substantially all assets of one, or subdividing an
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organization, or merging organizations. If propagation of a covered work
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results from an entity transaction, each party to that transaction who receives
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a copy of the work also receives whatever licenses to the work the party's
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predecessor in interest had or could give under the previous paragraph, plus a
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right to possession of the Corresponding Source of the work from the
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predecessor in interest, if the predecessor has it or can get it with
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reasonable efforts.
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You may not impose any further restrictions on the exercise of the rights
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granted or affirmed under this License. For example, you may not impose a
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license fee, royalty, or other charge for exercise of rights granted under this
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License, and you may not initiate litigation (including a cross-claim or
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counterclaim in a lawsuit) alleging that any patent claim is infringed by
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making, using, selling, offering for sale, or importing the Program or any
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portion of it.
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### 11. Patents.
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A *contributor* is a copyright holder who authorizes use under this License of
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the Program or a work on which the Program is based. The work thus licensed is
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called the contributor's *contributor version*.
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A contributor's *essential patent claims* are all patent claims owned or
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controlled by the contributor, whether already acquired or hereafter acquired,
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that would be infringed by some manner, permitted by this License, of making,
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using, or selling its contributor version, but do not include claims that would
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be infringed only as a consequence of further modification of the contributor
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version. For purposes of this definition, *control* includes the right to grant
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patent sublicenses in a manner consistent with the requirements of this
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License.
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Each contributor grants you a non-exclusive, worldwide, royalty-free patent
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license under the contributor's essential patent claims, to make, use, sell,
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offer for sale, import and otherwise run, modify and propagate the contents of
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its contributor version.
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In the following three paragraphs, a *patent license* is any express agreement
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or commitment, however denominated, not to enforce a patent (such as an express
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permission to practice a patent or covenant not to sue for patent
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infringement). To *grant* such a patent license to a party means to make such
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an agreement or commitment not to enforce a patent against the party.
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If you convey a covered work, knowingly relying on a patent license, and the
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Corresponding Source of the work is not available for anyone to copy, free of
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charge and under the terms of this License, through a publicly available
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network server or other readily accessible means, then you must either
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1. cause the Corresponding Source to be so available, or
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2. arrange to deprive yourself of the benefit of the patent license for this
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particular work, or
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3. arrange, in a manner consistent with the requirements of this License, to
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extend the patent license to downstream recipients.
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*Knowingly relying* means you have actual knowledge that, but for the patent
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license, your conveying the covered work in a country, or your recipient's use
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of the covered work in a country, would infringe one or more identifiable
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patents in that country that you have reason to believe are valid.
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If, pursuant to or in connection with a single transaction or arrangement, you
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convey, or propagate by procuring conveyance of, a covered work, and grant a
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patent license to some of the parties receiving the covered work authorizing
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them to use, propagate, modify or convey a specific copy of the covered work,
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then the patent license you grant is automatically extended to all recipients
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of the covered work and works based on it.
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A patent license is *discriminatory* if it does not include within the scope of
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its coverage, prohibits the exercise of, or is conditioned on the non-exercise
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of one or more of the rights that are specifically granted under this License.
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You may not convey a covered work if you are a party to an arrangement with a
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third party that is in the business of distributing software, under which you
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make payment to the third party based on the extent of your activity of
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conveying the work, and under which the third party grants, to any of the
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parties who would receive the covered work from you, a discriminatory patent
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license
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- a) in connection with copies of the covered work conveyed by you (or copies
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made from those copies), or
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- b) primarily for and in connection with specific products or compilations
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that contain the covered work, unless you entered into that arrangement, or
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that patent license was granted, prior to 28 March 2007.
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Nothing in this License shall be construed as excluding or limiting any implied
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license or other defenses to infringement that may otherwise be available to
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you under applicable patent law.
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### 12. No Surrender of Others' Freedom.
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If conditions are imposed on you (whether by court order, agreement or
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otherwise) that contradict the conditions of this License, they do not excuse
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you from the conditions of this License. If you cannot convey a covered work so
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as to satisfy simultaneously your obligations under this License and any other
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pertinent obligations, then as a consequence you may not convey it at all. For
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example, if you agree to terms that obligate you to collect a royalty for
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further conveying from those to whom you convey the Program, the only way you
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could satisfy both those terms and this License would be to refrain entirely
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from conveying the Program.
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### 13. Use with the GNU Affero General Public License.
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Notwithstanding any other provision of this License, you have permission to
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link or combine any covered work with a work licensed under version 3 of the
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GNU Affero General Public License into a single combined work, and to convey
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the resulting work. The terms of this License will continue to apply to the
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part which is the covered work, but the special requirements of the GNU Affero
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General Public License, section 13, concerning interaction through a network
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will apply to the combination as such.
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### 14. Revised Versions of this License.
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The Free Software Foundation may publish revised and/or new versions of the GNU
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General Public License from time to time. Such new versions will be similar in
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spirit to the present version, but may differ in detail to address new problems
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or concerns.
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Each version is given a distinguishing version number. If the Program specifies
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that a certain numbered version of the GNU General Public License *or any later
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version* applies to it, you have the option of following the terms and
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conditions either of that numbered version or of any later version published by
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the Free Software Foundation. If the Program does not specify a version number
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of the GNU General Public License, you may choose any version ever published by
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the Free Software Foundation.
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If the Program specifies that a proxy can decide which future versions of the
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GNU General Public License can be used, that proxy's public statement of
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acceptance of a version permanently authorizes you to choose that version for
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the Program.
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Later license versions may give you additional or different permissions.
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However, no additional obligations are imposed on any author or copyright
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holder as a result of your choosing to follow a later version.
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### 15. Disclaimer of Warranty.
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THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
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LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
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PARTIES PROVIDE THE PROGRAM *AS IS* WITHOUT WARRANTY OF ANY KIND, EITHER
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EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE
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QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
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DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
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CORRECTION.
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### 16. Limitation of Liability.
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
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COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS
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PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
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INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
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THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
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INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
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PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY
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HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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### 17. Interpretation of Sections 15 and 16.
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If the disclaimer of warranty and limitation of liability provided above cannot
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be given local legal effect according to their terms, reviewing courts shall
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apply local law that most closely approximates an absolute waiver of all civil
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liability in connection with the Program, unless a warranty or assumption of
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liability accompanies a copy of the Program in return for a fee.
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## END OF TERMS AND CONDITIONS ###
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### How to Apply These Terms to Your New Programs
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If you develop a new program, and you want it to be of the greatest possible
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use to the public, the best way to achieve this is to make it free software
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which everyone can redistribute and change under these terms.
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To do so, attach the following notices to the program. It is safest to attach
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them to the start of each source file to most effectively state the exclusion
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of warranty; and each file should have at least the *copyright* line and a
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pointer to where the full notice is found.
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<one line to give the program's name and a brief idea of what it does.>
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Copyright (C) <year> <name of author>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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Also add information on how to contact you by electronic and paper mail.
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If the program does terminal interaction, make it output a short notice like
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this when it starts in an interactive mode:
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<program> Copyright (C) <year> <name of author>
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This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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This is free software, and you are welcome to redistribute it
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under certain conditions; type `show c' for details.
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The hypothetical commands `show w` and `show c` should show the appropriate
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parts of the General Public License. Of course, your program's commands might
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be different; for a GUI interface, you would use an *about box*.
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You should also get your employer (if you work as a programmer) or school, if
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any, to sign a *copyright disclaimer* for the program, if necessary. For more
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information on this, and how to apply and follow the GNU GPL, see
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[http://www.gnu.org/licenses/](http://www.gnu.org/licenses/).
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631+
The GNU General Public License does not permit incorporating your program into
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proprietary programs. If your program is a subroutine library, you may consider
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it more useful to permit linking proprietary applications with the library. If
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this is what you want to do, use the GNU Lesser General Public License instead
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of this License. But first, please read
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[http://www.gnu.org/philosophy/why-not-lgpl.html](http://www.gnu.org/philosophy/why-not-lgpl.html).

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