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@c The GNU Free Documentation License.
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@center Version 1.3, 3 November 2008
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@c This file is intended to be included within another document,
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@c hence no sectioning command or @node.
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@display
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Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
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@uref{http://fsf.org/}
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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@end display
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@enumerate 0
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@item
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PREAMBLE
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The purpose of this License is to make a manual, textbook, or other
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functional and useful document @dfn{free} in the sense of freedom: to
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assure everyone the effective freedom to copy and redistribute it,
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with or without modifying it, either commercially or noncommercially.
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Secondarily, this License preserves for the author and publisher a way
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to get credit for their work, while not being considered responsible
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for modifications made by others.
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This License is a kind of ``copyleft'', which means that derivative
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works of the document must themselves be free in the same sense.  It
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complements the GNU General Public License, which is a copyleft
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license designed for free software.
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We have designed this License in order to use it for manuals for free
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software, because free software needs free documentation: a free
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program should come with manuals providing the same freedoms that the
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software does.  But this License is not limited to software manuals;
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it can be used for any textual work, regardless of subject matter or
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principally for works whose purpose is instruction or reference.
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APPLICABILITY AND DEFINITIONS
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This License applies to any manual or other work, in any medium, that
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contains a notice placed by the copyright holder saying it can be
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A ``Modified Version'' of the Document means any work containing the
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A ``Secondary Section'' is a named appendix or a front-matter section
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The ``Invariant Sections'' are certain Secondary Sections whose titles
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VERBATIM COPYING
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You may copy and distribute the Document in any medium, either
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You may also lend copies, under the same conditions stated above, and
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COPYING IN QUANTITY
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Copying with changes limited to the covers, as long as they preserve
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If the required texts for either cover are too voluminous to fit
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If you publish or distribute Opaque copies of the Document numbering
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MODIFICATIONS
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You may copy and distribute a Modified Version of the Document under
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the conditions of sections 2 and 3 above, provided that you release
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@enumerate A
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@item
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Use in the Title Page (and on the covers, if any) a title distinct
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from that of the Document, and from those of previous versions
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(which should, if there were any, be listed in the History section
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of the Document).  You may use the same title as a previous version
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if the original publisher of that version gives permission.
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List on the Title Page, as authors, one or more persons or entities
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responsible for authorship of the modifications in the Modified
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Version, together with at least five of the principal authors of the
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unless they release you from this requirement.
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State on the Title page the name of the publisher of the
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Modified Version, as the publisher.
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Preserve all the copyright notices of the Document.
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Add an appropriate copyright notice for your modifications
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Include, immediately after the copyright notices, a license notice
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terms of this License, in the form shown in the Addendum below.
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Preserve in that license notice the full lists of Invariant Sections
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Include an unaltered copy of this License.
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Preserve the section Entitled ``History'', Preserve its Title, and add
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Preserve the network location, if any, given in the Document for
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For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
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substance and tone of each of the contributor acknowledgements and/or
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Preserve all the Invariant Sections of the Document,
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Delete any section Entitled ``Endorsements''.  Such a section
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Do not retitle any existing section to be Entitled ``Endorsements'' or
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Preserve any Warranty Disclaimers.
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If the Modified Version includes new front-matter sections or
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You may add a section Entitled ``Endorsements'', provided it contains
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You may add a passage of up to five words as a Front-Cover Text, and a
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The author(s) and publisher(s) of the Document do not by this License
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COMBINING DOCUMENTS
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You may combine the Document with other documents released under this
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The combined work need only contain one copy of this License, and
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Make the same adjustment to the section titles in the list of
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In the combination, you must combine any sections Entitled ``History''
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``History''; likewise combine any sections Entitled ``Acknowledgements'',
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COLLECTIONS OF DOCUMENTS
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You may make a collection consisting of the Document and other documents
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You may extract a single document from such a collection, and distribute
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AGGREGATION WITH INDEPENDENT WORKS
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A compilation of the Document or its derivatives with other separate
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When the Document is included in an aggregate, this License does not
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If the Cover Text requirement of section 3 is applicable to these
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@item
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TRANSLATION
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Translation is considered a kind of modification, so you may
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or disclaimer, the original version will prevail.
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If a section in the Document is Entitled ``Acknowledgements'',
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TERMINATION
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You may not copy, modify, sublicense, or distribute the Document
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Moreover, your license from a particular copyright holder is
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Termination of your rights under this section does not terminate the
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FUTURE REVISIONS OF THIS LICENSE
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The Free Software Foundation may publish new, revised versions
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of the GNU Free Documentation License from time to time.  Such new
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versions will be similar in spirit to the present version, but may
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differ in detail to address new problems or concerns.  See
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@uref{http://www.gnu.org/copyleft/}.
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Each version of the License is given a distinguishing version number.
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If the Document specifies that a particular numbered version of this
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License ``or any later version'' applies to it, you have the option of
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following the terms and conditions either of that specified version or
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of any later version that has been published (not as a draft) by the
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Free Software Foundation.  If the Document does not specify a version
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number of this License, you may choose any version ever published (not
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as a draft) by the Free Software Foundation.  If the Document
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specifies that a proxy can decide which future versions of this
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License can be used, that proxy's public statement of acceptance of a
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version permanently authorizes you to choose that version for the
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Document.
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@item
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RELICENSING
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``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
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World Wide Web server that publishes copyrightable works and also
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provides prominent facilities for anybody to edit those works.  A
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public wiki that anybody can edit is an example of such a server.  A
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``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the
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site means any set of copyrightable works thus published on the MMC
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site.
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``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0
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license published by Creative Commons Corporation, a not-for-profit
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corporation with a principal place of business in San Francisco,
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California, as well as future copyleft versions of that license
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published by that same organization.
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``Incorporate'' means to publish or republish a Document, in whole or
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in part, as part of another Document.
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An MMC is ``eligible for relicensing'' if it is licensed under this
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License, and if all works that were first published under this License
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somewhere other than this MMC, and subsequently incorporated in whole
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or in part into the MMC, (1) had no cover texts or invariant sections,
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and (2) were thus incorporated prior to November 1, 2008.
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The operator of an MMC Site may republish an MMC contained in the site
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under CC-BY-SA on the same site at any time before August 1, 2009,
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provided the MMC is eligible for relicensing.
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@end enumerate
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@page
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@heading ADDENDUM: How to use this License for your documents
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To use this License in a document you have written, include a copy of
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the License in the document and put the following copyright and
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license notices just after the title page:
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@smallexample
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@group
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  Copyright (C)  @var{year}  @var{your name}.
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  Permission is granted to copy, distribute and/or modify this document
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  under the terms of the GNU Free Documentation License, Version 1.3
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  or any later version published by the Free Software Foundation;
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  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
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  Texts.  A copy of the license is included in the section entitled ``GNU
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  Free Documentation License''.
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@end group
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@end smallexample
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If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
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replace the ``with@dots{}Texts.''@: line with this:
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@smallexample
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@group
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    with the Invariant Sections being @var{list their titles}, with
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    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
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    being @var{list}.
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@end group
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@end smallexample
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If you have Invariant Sections without Cover Texts, or some other
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combination of the three, merge those two alternatives to suit the
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situation.
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If your document contains nontrivial examples of program code, we
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recommend releasing these examples in parallel under your choice of
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free software license, such as the GNU General Public License,
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to permit their use in free software.
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@c Local Variables:
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@c ispell-local-pdict: "ispell-dict"
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@c End: