emacs.d/gpl-3.0.org

# The GNU Free Documentation License.
#+begin_center
Version 3, 29 June 2007
#+end_center

# This file is intended to be included within another document.

#+begin_verse
Copyright (C) 2007 Free Software Foundation, Inc. [[https://fsf.org/]]

Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
#+end_verse

#+begin_center
*Preamble*
#+end_center

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
rights or asking you to surrender the rights. Therefore, you have
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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
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Developers that use the GNU GPL protect your rights with two steps: (1)
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For the developers' and authors' protection, the GPL clearly explains
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Some devices are designed to deny users access to install or run
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The precise terms and conditions for copying, distribution and
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#+begin_center
*TERMS AND CONDITIONS*
#+end_center

0. [@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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   To "modify" a work means to copy from or adapt all or part of the work
   in a fashion requiring copyright permission, other than the making of an
   exact copy. The resulting work is called a "modified version" of the
   earlier work or a work "based on" the earlier work.

   A "covered work" means either the unmodified Program or a work based on
   the Program.

   To "propagate" a work means to do anything with it that, without
   permission, would make you directly or secondarily liable for
   infringement under applicable copyright law, except executing it on a
   computer or modifying a private copy. Propagation includes copying,
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   public, and in some countries other activities as well.

   To "convey" a work means any kind of propagation that enables other
   parties to make or receive copies. Mere interaction with a user through
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   An interactive user interface displays "Appropriate Legal Notices" to
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   License, and how to view a copy of this License. If the interface
   presents a list of user commands or options, such as a menu, a prominent
   item in the list meets this criterion.

1. [@1] *Source Code*.

   The "source code" for a work means the preferred form of the work for
   making modifications to it. "Object code" means any non-source form of a
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   A "Standard Interface" means an interface that either is an official
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   The "System Libraries" of an executable work include anything, other
   than the work as a whole, that (a) is included in the normal form of
   packaging a Major Component, but which is not part of that Major
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   The "Corresponding Source" for a work in object code form means all the
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   and other parts of the work.

   The Corresponding Source need not include anything that users can
   regenerate automatically from other parts of the Corresponding Source.

   The Corresponding Source for a work in source code form is that same
   work.

2. [@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 met. This License explicitly affirms your unlimited
   permission to run the unmodified Program. The output from running a
   covered work is covered by this License only if the output, given its
   content, constitutes a covered work. This License acknowledges your
   rights of fair use or other equivalent, as provided by copyright law.

   You may make, run and propagate covered works that you do not convey,
   without conditions so long as your license otherwise remains in force.
   You may convey covered works to others for the sole purpose of having
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   you must do so exclusively on your behalf, under your direction and
   control, on terms that prohibit them from making any copies of your
   copyrighted material outside their relationship with you.

   Conveying under any other circumstances is permitted solely under the
   conditions stated below. Sublicensing is not allowed; section 10 makes
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3. [@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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   users, your or third parties' legal rights to forbid circumvention of
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4. [@4] *Conveying Verbatim Copies*.

   You may convey verbatim copies of the Program's source code as you
   receive it, in any medium, provided that you conspicuously and
   appropriately publish on each copy an appropriate copyright notice; keep
   intact all notices stating that this License and any non-permissive
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   notices of the absence of any warranty; and give all recipients a copy
   of this License along with the Program.

   You may charge any price or no price for each copy that you convey, and
   you may offer support or warranty protection for a fee.

5. [@5] *Conveying Modified Source Versions*.

   You may convey a work based on the Program, or the modifications to
   produce it from the Program, in the form of source code under the terms
   of section 4, provided that you also meet all of these conditions:

   1) [@1] The work must carry prominent notices stating that you modified it,
      and giving a relevant date.

   2) [@2] The work must carry prominent notices stating that it is
      released under this License and any conditions added under
      section 7. This requirement modifies the requirement in section 4
      to "keep intact all notices".

   3) [@3] You must license the entire work, as a whole, under this
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      additional terms, to the whole of the work, and all its parts,
      regardless of how they are packaged. This License gives no
      permission to license the work in any other way, but it does not
      invalidate such permission if you have separately received it.

   4) [@4] If the work has interactive user interfaces, each must display
      Appropriate Legal Notices; however, if the Program has interactive
      interfaces that do not display Appropriate Legal Notices, your work
      need not make them do so.

   A compilation of a covered work with other separate and independent
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   to limit the access or legal rights of the compilation's users beyond
   what the individual works permit. Inclusion of a covered work in an
   aggregate does not cause this License to apply to the other parts of the
   aggregate.

6. [@6] *Conveying Non-Source Forms*.

   You may convey a covered work in object code form under the terms of
   sections 4 and 5, provided that you also convey the machine-readable
   Corresponding Source under the terms of this License, in one of these
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   1) [@1] Convey the object code in, or embodied in, a physical product
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      Corresponding Source fixed on a durable physical medium customarily
      used for software interchange.

   2) [@2] Convey the object code in, or embodied in, a physical product
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      written offer, valid for at least three years and valid for as long
      as you offer spare parts or customer support for that product
      model, to give anyone who possesses the object code either (1) a
      copy of the Corresponding Source for all the software in the
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      medium customarily used for software interchange, for a price no
      more than your reasonable cost of physically performing this
      conveying of source, or (2) access to copy the Corresponding Source
      from a network server at no charge.

   3) [@3] Convey individual copies of the object code with a copy of the
      written offer to provide the Corresponding Source. This alternative
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      received the object code with such an offer, in accord with
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   4) [@4] Convey the object code by offering access from a designated
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   5) [@5] Convey the object code using peer-to-peer transmission,
      provided you inform other peers where the object code and
      Corresponding Source of the work are being offered to the general
      public at no charge under subsection 6d.

   A separable portion of the object code, whose source code is excluded
   from the Corresponding Source as a System Library, need not be included
   in conveying the object code work.

   A "User Product" is either (1) a "consumer product", which means any
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   product. A product is a consumer product regardless of whether the
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   unless such uses represent the only significant mode of use of the
   product.

   "Installation Information" for a User Product means any methods,
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   and execute modified versions of a covered work in that User Product
   from a modified version of its Corresponding Source. The information
   must suffice to ensure that the continued functioning of the modified
   object code is in no case prevented or interfered with solely because
   modification has been made.

   If you convey an object code work under this section in, or with, or
   specifically for use in, a User Product, and the conveying occurs as
   part of a transaction in which the right of possession and use of the
   User Product is transferred to the recipient in perpetuity or for a
   fixed term (regardless of how the transaction is characterized), the
   Corresponding Source conveyed under this section must be accompanied by
   the Installation Information. But this requirement does not apply if
   neither you nor any third party retains the ability to install modified
   object code on the User Product (for example, the work has been
   installed in ROM).

   The requirement to provide Installation Information does not include a
   requirement to continue to provide support service, warranty, or updates
   for a work that has been modified or installed by the recipient, or for
   the User Product in which it has been modified or installed. Access to a
   network may be denied when the modification itself materially and
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   Corresponding Source conveyed, and Installation Information provided, in
   accord with this section must be in a format that is publicly documented
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   form), and must require no special password or key for unpacking,
   reading or copying.

7. [@7] *Additional Terms*.

   "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
   under those permissions, but the entire Program remains governed by this
   License without regard to the additional permissions.

   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 it.
   (Additional permissions may be written to require their own removal in
   certain cases when you modify the work.) You may place additional
   permissions on material, added by you to a covered work, for which you
   have or can give appropriate copyright permission.

   Notwithstanding any other provision of this License, for material you
   add to a covered work, you may (if authorized by the copyright holders
   of that material) supplement the terms of this License with terms:

   1) [@a] Disclaiming warranty or limiting liability differently from the
      terms of sections 15 and 16 of this License; or

   2) [@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

   3) [@c] Prohibiting misrepresentation of the origin of that material,
      or requiring that modified versions of such material be marked in
      reasonable ways as different from the original version; or

   4) [@d] Limiting the use for publicity purposes of names of licensors
      or authors of the material; or

   5) [@e] Declining to grant rights under trademark law for use of some
      trade names, trademarks, or service marks; or

   6) [@f] Requiring indemnification of licensors and authors of that
      material by anyone who conveys the material (or modified versions
      of it) with contractual assumptions of liability to the recipient,
      for any liability that these contractual assumptions directly
      impose on those licensors and authors.

   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
   governed by this License along with a term that is a further
   restriction, you may remove that term. If a license document contains a
   further restriction but permits relicensing or conveying under this
   License, you may add to a covered work material governed by the terms of
   that license document, provided that the further restriction does not
   survive such relicensing or conveying.

   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 additional terms
   that apply to those files, or a notice indicating where to find the
   applicable terms.

   Additional terms, permissive or non-permissive, may be stated in the
   form of a separately written license, or stated as exceptions; the above
   requirements apply either way.

8. [@8] *Termination*.

   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).

   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.

   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 received notice
   of violation of this License (for any work) from that copyright holder,
   and you cure the violation prior to 30 days after your receipt of the
   notice.

   Termination of your rights under this section does not terminate the
   licenses of parties who have received copies or rights from you under
   this License. If your rights have been terminated and not permanently
   reinstated, you do not qualify to receive new licenses for the same
   material under section 10.

9. [@9] *Acceptance Not Required for Having Copies*.

   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 to receive a
   copy likewise does not require acceptance. However, nothing other than
   this License grants you permission to propagate or modify any covered
   work. These actions infringe copyright if you do not accept this
   License. Therefore, by modifying or propagating a covered work, you
   indicate your acceptance of this License to do so.

10. [@10] *Automatic Licensing of Downstream Recipients*.

    Each time you convey a covered work, the recipient automatically
    receives a license from the original licensors, to run, modify and
    propagate that work, subject to this License. You are not responsible
    for enforcing compliance by third parties with this License.

    An "entity transaction" is a transaction transferring control of an
    organization, or substantially all assets of one, or subdividing an
    organization, or merging organizations. If propagation of a covered work
    results from an entity transaction, each party to that transaction who
    receives a copy of the work also receives whatever licenses to the work
    the party's predecessor in interest had or could give under the previous
    paragraph, plus a right to possession of the Corresponding Source of the
    work from the predecessor in interest, if the predecessor has it or can
    get it with reasonable efforts.

    You may not impose any further restrictions on the exercise of the
    rights granted or affirmed 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, offering for sale,
    or importing the Program or any portion of it.

11. [@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 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.

    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. [@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. [@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 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.

14. [@14] *Revised Versions of this License*.

    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.

    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.

    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.

    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.

15. [@15] *Disclaimer of Warranty*.

    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.

16. [@15] *Limitation of Liability*.

    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.

17. [@16] *Interpretation of Sections 15 and 16*.

    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.

#+begin_center
*END OF TERMS AND CONDITIONS*
#+end_center

** How to Apply These Terms to Your New Programs
:PROPERTIES:
:CUSTOM_ID: how-to-apply-these-terms-to-your-new-programs
:END:
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.

To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.

#+begin_example
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
#+end_example

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short notice
like this when it starts in an interactive mode:

#+begin_example
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
#+end_example

The hypothetical commands `show w' and `show c' should show the
appropriate parts of the General Public License. Of course, your
program's commands might be different; for a GUI interface, you would
use an "about box".

You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow the
GNU GPL, see [[https://www.gnu.org/licenses/]].

The GNU General Public License does not permit incorporating your
program into proprietary programs. If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library. If this is what you want to do, use the
GNU Lesser General Public License instead of this License. But first,
please read [[https://www.gnu.org/licenses/why-not-lgpl.html]].