<sect1 id="licenses-gfdl-section-2" 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 <quote>Document</quote>, below, refers to any such manual or

    work.  Any member of the public is a licensee, and is addressed as

    <quote>you</quote>.  You accept the license if you copy, modify or

    distribute the work in a way requiring permission under copyright

    law.</para>

    <para>A <quote>Modified Version</quote> 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 <quote>Secondary Section</quote> 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 <quote>Invariant Sections</quote> 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 <quote>Cover Texts</quote> 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 <quote>Transparent</quote> 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 <quote>Transparent</quote> is called

    <quote>Opaque</quote>.</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 <quote>Title Page</quote> 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, <quote>Title Page</quote> 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 <quote>Entitled XYZ</quote> 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 <quote>Acknowledgements</quote>,

    <quote>Dedications</quote>, <quote>Endorsements</quote>, or

    <quote>History</quote>.) To <quote>Preserve the Title</quote> of

    such a section when you modify the Document means that it remains

    a section <quote>Entitled XYZ</quote> 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>

</sect1>