%% This file is part of Enblend.
%% Licence details can be found in the file COPYING.


\chapter[\acronym{GNU} \acronym{FDL}\commonpart]%
{\label{sec:fdl}%
  \genidx{GNU Free Documentation License@\acronym{GNU} Free Documentation License}%
  \gensee{GNU FDL@\acronym{GNU} \acronym{FDL}}{\acronym{GNU} Free Documentation License}%
  \gensee{FDL@\acronym{FDL}}{\acronym{GNU} Free Documentation License}%
  The \acronym{GNU} Free Documentation License\commonpart}

Version 1.2, November 2002

\begin{quotation}
  \noindent Copyright \copyright{} 2000, 2001, 2002 Free Software Foundation, Inc. \\ 51
  Franklin St, Fifth Floor, Boston, MA 02110--1301, USA

  Everyone is permitted to copy and distribute verbatim copies of this license document, but
  changing it is not allowed.
\end{quotation}

\begin{enumerate}
  \setcounter{enumi}{-1}% FIXME: \setcounter does not work with Hevea.
\item
  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 \acronym{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.

\item
  APPLICABILITY AND DEFINITIONS \\
  This License applies to any manual or other work, in any medium, that contains a notice placed
  by the copyright 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 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 \acronym{ascii} without
  markup, Texinfo input format, \LaTeX{} input format, \acronym{SGML} or \acronym{XML} using a
  publicly available \acronym{DTD}, and standard-conforming simple \acronym{HTML}, PostScript or
  \acronym{PDF} designed for human modification.  Examples of transparent image formats include
  \acronym{PNG}, \acronym{XCF} and \acronym{JPG}.  Opaque formats include proprietary formats
  that can be read and edited only by proprietary word processors, \acronym{SGML} or
  \acronym{XML} for which the \acronym{DTD} and/or processing tools are not generally available,
  and the machine-generated \acronym{HTML}, PostScript or \acronym{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.

  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.

\item
  VERBATIM COPYING \\
  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.

\item
  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 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.

\item
  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:

  \begin{enumerate}
    \renewcommand{\labelenumii}{\Alph{enumii}.}
  \item
    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.

  \item
    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.

  \item
    State on the Title page the name of the publisher of the Modified Version, as the publisher.

  \item
    Preserve all the copyright notices of the Document.

  \item
    Add an appropriate copyright notice for your modifications adjacent to the other copyright
    notices.

  \item
    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.

  \item
    Preserve in that license notice the full lists of Invariant Sections and required Cover
    Texts given in the Document's license notice.

  \item
    Include an unaltered copy of this License.

  \item
    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.

  \item
    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.

  \item
    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.

  \item
    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.

  \item
    Delete any section Entitled ``Endorsements''.  Such a section may not be included in the
    Modified Version.

  \item
    Do not retitle any existing section to be Entitled ``Endorsements'' or to conflict in title
    with any Invariant Section.

  \item
    Preserve any Warranty Disclaimers.
  \end{enumerate}

  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 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.

\item
  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.''

\item
  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.

\item
  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.

\item
  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 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.

\item
  TERMINATION \\
  You may not copy, modify, sublicense, or distribute the Document except as expressly provided
  for under this License.  Any other attempt to copy, modify, sublicense or distribute the
  Document is void, and will automatically terminate your rights under this License.  However,
  parties who have received copies, or rights, from you under this License will not have their
  licenses terminated so long as such parties remain in full compliance.

\item
  FUTURE REVISIONS OF THIS LICENSE \\
  The Free Software Foundation may publish new, revised versions of the \acronym{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
  \uref{\gnuorgcopyleft}{\acronym{GNU} Copyleft}.

  Each version of the License is given a distinguishing version number.  If the Document
  specifies that a 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.
\end{enumerate}


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