gfdl(7)
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GFDL(7) GNU GFDL(7)
NAME
gfdl - GNU Free Documentation License
DESCRIPTION
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GNU Free Documentation License
Version 1.3, 3 November 2008
Copyright (c) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
E<lt>B<http://fsf.org/>E<gt>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
0. PREAMBLE
The purpose of this License is to make a manual,
textbook, or other functional and useful document free
in the sense of freedom: to assure everyone the
effective freedom to copy and redistribute it, with or
without modifying it, either commercially or
noncommercially. Secondarily, this License preserves
for the author and publisher a way to get credit for
their work, while not being considered responsible for
modifications made by others.
This License is a kind of "copyleft", which means that
derivative works of the document must themselves be free
in the same sense. It complements the GNU General
Public License, which is a copyleft license designed for
free software.
We have designed this License in order to use it for
manuals for free software, because free software needs
free documentation: a free program should come with
manuals providing the same freedoms that the software
does. But this License is not limited to software
manuals; it can be used for any textual work, regardless
of subject matter or whether it is published as a
printed book. We recommend this License principally for
works whose purpose is instruction or reference.
1. APPLICABILITY AND DEFINITIONS
This License applies to any manual or other work, in any
medium, that contains a notice placed by the copyright
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holder saying it can be distributed under the terms of
this License. Such a notice grants a world-wide,
royalty-free license, unlimited in duration, to use that
work under the conditions stated herein. The
"Document", below, refers to any such manual or work.
Any member of the public is a licensee, and is addressed
as "you". You accept the license if you copy, modify or
distribute the work in a way requiring permission under
copyright law.
A "Modified Version" of the Document means any work
containing the Document or a portion of it, either
copied verbatim, or with modifications and/or translated
into another language.
A "Secondary Section" is a named appendix or a front-
matter section of the Document that deals exclusively
with the relationship of the publishers or authors of
the Document to the Document's overall subject (or to
related matters) and contains nothing that could fall
directly within that overall subject. (Thus, if the
Document is in part a textbook of mathematics, a
Secondary Section may not explain any mathematics.) The
relationship could be a matter of historical connection
with the subject or with related matters, or of legal,
commercial, philosophical, ethical or political position
regarding them.
The "Invariant Sections" are certain Secondary Sections
whose titles are designated, as being those of Invariant
Sections, in the notice that says that the Document is
released under this License. If a section does not fit
the above definition of Secondary then it is not allowed
to be designated as Invariant. The Document may contain
zero Invariant Sections. If the Document does not
identify any Invariant Sections then there are none.
The "Cover Texts" are certain short passages of text
that are listed, as Front-Cover Texts or Back-Cover
Texts, in the notice that says that the Document is
released under this License. A Front-Cover Text may be
at most 5 words, and a Back-Cover Text may be at most 25
words.
A "Transparent" copy of the Document means a machine-
readable copy, represented in a format whose
specification is available to the general public, that
is suitable for revising the document straightforwardly
with generic text editors or (for images composed of
pixels) generic paint programs or (for drawings) some
widely available drawing editor, and that is suitable
for input to text formatters or for automatic
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translation to a variety of formats suitable for input
to text formatters. A copy made in an otherwise
Transparent file format whose markup, or absence of
markup, has been arranged to thwart or discourage
subsequent modification by readers is not Transparent.
An image format is not Transparent if used for any
substantial amount of text. A copy that is not
"Transparent" is called "Opaque".
Examples of suitable formats for Transparent copies
include plain ASCII without markup, Texinfo input
format, LaTeX input format, SGML or XML using a publicly
available DTD, and standard-conforming simple HTML,
PostScript or PDF designed for human modification.
Examples of transparent image formats include PNG, XCF
and JPG. Opaque formats include proprietary formats
that can be read and edited only by proprietary word
processors, SGML or XML for which the DTD and/or
processing tools are not generally available, and the
machine-generated HTML, PostScript or PDF produced by
some word processors for output purposes only.
The "Title Page" means, for a printed book, the title
page itself, plus such following pages as are needed to
hold, legibly, the material this License requires to
appear in the title page. For works in formats which do
not have any title page as such, "Title Page" means the
text near the most prominent appearance of the work's
title, preceding the beginning of the body of the text.
The "publisher" means any person or entity that
distributes copies of the Document to the public.
A section "Entitled XYZ" means a named subunit of the
Document whose title either is precisely XYZ or contains
XYZ in parentheses following text that translates XYZ in
another language. (Here XYZ stands for a specific
section name mentioned below, such as
"Acknowledgements", "Dedications", "Endorsements", or
"History".) To "Preserve the Title" of such a section
when you modify the Document means that it remains a
section "Entitled XYZ" according to this definition.
The Document may include Warranty Disclaimers next to
the notice which states that this License applies to the
Document. These Warranty Disclaimers are considered to
be included by reference in this License, but only as
regards disclaiming warranties: any other implication
that these Warranty Disclaimers may have is void and has
no effect on the meaning of this License.
2. VERBATIM COPYING
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You may copy and distribute the Document in any medium,
either commercially or noncommercially, provided that
this License, the copyright notices, and the license
notice saying this License applies to the Document are
reproduced in all copies, and that you add no other
conditions whatsoever to those of this License. You may
not use technical measures to obstruct or control the
reading or further copying of the copies you make or
distribute. However, you may accept compensation in
exchange for copies. If you distribute a large enough
number of copies you must also follow the conditions in
section 3.
You may also lend copies, under the same conditions
stated above, and you may publicly display copies.
3. COPYING IN QUANTITY
If you publish printed copies (or copies in media that
commonly have printed covers) of the Document, numbering
more than 100, and the Document's license notice
requires Cover Texts, you must enclose the copies in
covers that carry, clearly and legibly, all these Cover
Texts: Front-Cover Texts on the front cover, and Back-
Cover Texts on the back cover. Both covers must also
clearly and legibly identify you as the publisher of
these copies. The front cover must present the full
title with all words of the title equally prominent and
visible. You may add other material on the covers in
addition. Copying with changes limited to the covers,
as long as they preserve the title of the Document and
satisfy these conditions, can be treated as verbatim
copying in other respects.
If the required texts for either cover are too
voluminous to fit legibly, you should put the first ones
listed (as many as fit reasonably) on the actual cover,
and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the
Document numbering more than 100, you must either
include a machine-readable Transparent copy along with
each Opaque copy, or state in or with each Opaque copy a
computer-network location from which the general
network-using public has access to download using
public-standard network protocols a complete Transparent
copy of the Document, free of added material. If you
use the latter option, you must take reasonably prudent
steps, when you begin distribution of Opaque copies in
quantity, to ensure that this Transparent copy will
remain thus accessible at the stated location until at
least one year after the last time you distribute an
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Opaque copy (directly or through your agents or
retailers) of that edition to the public.
It is requested, but not required, that you contact the
authors of the Document well before redistributing any
large number of copies, to give them a chance to provide
you with an updated version of the Document.
4. MODIFICATIONS
You may copy and distribute a Modified Version of the
Document under the conditions of sections 2 and 3 above,
provided that you release the Modified Version under
precisely this License, with the Modified Version
filling the role of the Document, thus licensing
distribution and modification of the Modified Version to
whoever possesses a copy of it. In addition, you must
do these things in the Modified Version:
A. Use in the Title Page (and on the covers, if any) a
title distinct from that of the Document, and from
those of previous versions (which should, if there
were any, be listed in the History section of the
Document). You may use the same title as a previous
version if the original publisher of that version
gives permission.
B. List on the Title Page, as authors, one or more
persons or entities responsible for authorship of
the modifications in the Modified Version, together
with at least five of the principal authors of the
Document (all of its principal authors, if it has
fewer than five), unless they release you from this
requirement.
C. State on the Title page the name of the publisher of
the Modified Version, as the publisher.
D. Preserve all the copyright notices of the Document.
E. Add an appropriate copyright notice for your
modifications adjacent to the other copyright
notices.
F. Include, immediately after the copyright notices, a
license notice giving the public permission to use
the Modified Version under the terms of this
License, in the form shown in the Addendum below.
G. Preserve in that license notice the full lists of
Invariant Sections and required Cover Texts given in
the Document's license notice.
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H. Include an unaltered copy of this License.
I. Preserve the section Entitled "History", Preserve
its Title, and add to it an item stating at least
the title, year, new authors, and publisher of the
Modified Version as given on the Title Page. If
there is no section Entitled "History" in the
Document, create one stating the title, year,
authors, and publisher of the Document as given on
its Title Page, then add an item describing the
Modified Version as stated in the previous sentence.
J. Preserve the network location, if any, given in the
Document for public access to a Transparent copy of
the Document, and likewise the network locations
given in the Document for previous versions it was
based on. These may be placed in the "History"
section. You may omit a network location for a work
that was published at least four years before the
Document itself, or if the original publisher of the
version it refers to gives permission.
K. For any section Entitled "Acknowledgements" or
"Dedications", Preserve the Title of the section,
and preserve in the section all the substance and
tone of each of the contributor acknowledgements
and/or dedications given therein.
L. Preserve all the Invariant Sections of the Document,
unaltered in their text and in their titles.
Section numbers or the equivalent are not considered
part of the section titles.
M. Delete any section Entitled "Endorsements". Such a
section may not be included in the Modified Version.
N. Do not retitle any existing section to be Entitled
"Endorsements" or to conflict in title with any
Invariant Section.
O. Preserve any Warranty Disclaimers.
If the Modified Version includes new front-matter
sections or appendices that qualify as Secondary
Sections and contain no material copied from the
Document, you may at your option designate some or all
of these sections as invariant. To do this, add their
titles to the list of Invariant Sections in the Modified
Version's license notice. These titles must be distinct
from any other section titles.
You may add a section Entitled "Endorsements", provided
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it contains nothing but endorsements of your Modified
Version by various parties---for example, statements of
peer review or that the text has been approved by an
organization as the authoritative definition of a
standard.
You may add a passage of up to five words as a Front-
Cover Text, and a passage of up to 25 words as a Back-
Cover Text, to the end of the list of Cover Texts in the
Modified Version. Only one passage of Front-Cover Text
and one of Back-Cover Text may be added by (or through
arrangements made by) any one entity. If the Document
already includes a cover text for the same cover,
previously added by you or by arrangement made by the
same entity you are acting on behalf of, you may not add
another; but you may replace the old one, on explicit
permission from the previous publisher that added the
old one.
The author(s) and publisher(s) of the Document do not by
this License give permission to use their names for
publicity for or to assert or imply endorsement of any
Modified Version.
5. COMBINING DOCUMENTS
You may combine the Document with other documents
released under this License, under the terms defined in
section 4 above for modified versions, provided that you
include in the combination all of the Invariant Sections
of all of the original documents, unmodified, and list
them all as Invariant Sections of your combined work in
its license notice, and that you preserve all their
Warranty Disclaimers.
The combined work need only contain one copy of this
License, and multiple identical Invariant Sections may
be replaced with a single copy. If there are multiple
Invariant Sections with the same name but different
contents, make the title of each such section unique by
adding at the end of it, in parentheses, the name of the
original author or publisher of that section if known,
or else a unique number. Make the same adjustment to
the section titles in the list of Invariant Sections in
the license notice of the combined work.
In the combination, you must combine any sections
Entitled "History" in the various original documents,
forming one section Entitled "History"; likewise combine
any sections Entitled "Acknowledgements", and any
sections Entitled "Dedications". You must delete all
sections Entitled "Endorsements."
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6. COLLECTIONS OF DOCUMENTS
You may make a collection consisting of the Document and
other documents released under this License, and replace
the individual copies of this License in the various
documents with a single copy that is included in the
collection, provided that you follow the rules of this
License for verbatim copying of each of the documents in
all other respects.
You may extract a single document from such a
collection, and distribute it individually under this
License, provided you insert a copy of this License into
the extracted document, and follow this License in all
other respects regarding verbatim copying of that
document.
7. AGGREGATION WITH INDEPENDENT WORKS
A compilation of the Document or its derivatives with
other separate and independent documents or works, in or
on a volume of a storage or distribution medium, is
called an "aggregate" if the copyright resulting from
the compilation is not used to limit the legal rights of
the compilation's users beyond what the individual works
permit. When the Document is included in an aggregate,
this License does not apply to the other works in the
aggregate which are not themselves derivative works of
the Document.
If the Cover Text requirement of section 3 is applicable
to these copies of the Document, then if the Document is
less than one half of the entire aggregate, the
Document's Cover Texts may be placed on covers that
bracket the Document within the aggregate, or the
electronic equivalent of covers if the Document is in
electronic form. Otherwise they must appear on printed
covers that bracket the whole aggregate.
8. TRANSLATION
Translation is considered a kind of modification, so you
may distribute translations of the Document under the
terms of section 4. Replacing Invariant Sections with
translations requires special permission from their
copyright holders, but you may include translations of
some or all Invariant Sections in addition to the
original versions of these Invariant Sections. You may
include a translation of this License, and all the
license notices in the Document, and any Warranty
Disclaimers, provided that you also include the original
English version of this License and the original
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versions of those notices and disclaimers. In case of a
disagreement between the translation and the original
version of this License or a notice or disclaimer, the
original version will prevail.
If a section in the Document is Entitled
"Acknowledgements", "Dedications", or "History", the
requirement (section 4) to Preserve its Title (section
1) will typically require changing the actual title.
9. TERMINATION
You may not copy, modify, sublicense, or distribute the
Document except as expressly provided under this
License. Any attempt otherwise to copy, modify,
sublicense, or distribute it is void, and will
automatically terminate your rights under this License.
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, receipt of a copy of some or all of the same
material does not give you any rights to use it.
10. FUTURE REVISIONS OF THIS LICENSE
The Free Software Foundation may publish new, revised
versions of the GNU Free Documentation 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. See
<http://www.gnu.org/copyleft/>.
Each version of the License is given a distinguishing
version number. If the Document specifies that a
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particular numbered version of this License "or any
later version" applies to it, you have the option of
following the terms and conditions either of that
specified version or of any later version that has been
published (not as a draft) by the Free Software
Foundation. If the Document does not specify a version
number of this License, you may choose any version ever
published (not as a draft) by the Free Software
Foundation. If the Document specifies that a proxy can
decide which future versions of this License can be
used, that proxy's public statement of acceptance of a
version permanently authorizes you to choose that
version for the Document.
11. RELICENSING
"Massive Multiauthor Collaboration Site" (or "MMC Site")
means any World Wide Web server that publishes
copyrightable works and also provides prominent
facilities for anybody to edit those works. A public
wiki that anybody can edit is an example of such a
server. A "Massive Multiauthor Collaboration" (or
"MMC") contained in the site means any set of
copyrightable works thus published on the MMC site.
"CC-BY-SA" means the Creative Commons Attribution-Share
Alike 3.0 license published by Creative Commons
Corporation, a not-for-profit corporation with a
principal place of business in San Francisco,
California, as well as future copyleft versions of that
license published by that same organization.
"Incorporate" means to publish or republish a Document,
in whole or in part, as part of another Document.
An MMC is "eligible for relicensing" if it is licensed
under this License, and if all works that were first
published under this License somewhere other than this
MMC, and subsequently incorporated in whole or in part
into the MMC, \fIs0(1) had no cover texts or invariant
sections, and (2) were thus incorporated prior to
November 1, 2008.
The operator of an MMC Site may republish an MMC
contained in the site under CC-BY-SA on the same site at
any time before August 1, 2009, provided the MMC is
eligible for relicensing.
ADDENDUM: How to use this License for your documents
To use this License in a document you have written, include
a copy of the License in the document and put the following
copyright and license notices just after the title page:
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GFDL(7) GNU GFDL(7)
Copyright (C) <year> <your name>.
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
Texts. A copy of the license is included in the section entitled "GNU
Free Documentation License".
If you have Invariant Sections, Front-Cover Texts and Back-
Cover Texts, replace the "with...Texts." line with this:
with the Invariant Sections being <list their titles>, with
the Front-Cover Texts being <list>, and with the Back-Cover Texts
being <list>.
If you have Invariant Sections without Cover Texts, or some
other combination of the three, merge those two alternatives
to suit the situation.
If your document contains nontrivial examples of program
code, we recommend releasing these examples in parallel
under your choice of free software license, such as the GNU
General Public License, to permit their use in free
software.
SEE ALSO
gpl(7), fsf-funding(7).
COPYRIGHT
Copyright (c) 2000, 2001, 2002, 2007, 2008 Free Software
Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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