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<section id="sec-licenses-gfdl-1" xreflabel="``Applicability and
definitions''">
    
    <title>Applicability and definitions</title>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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''.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
    <para>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.</para>
    
</section>