User manual

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8 GNU Free Documentation License
GNU Free Documentation LicenseGNU Free Documentation License
GNU Free Documentation License
Version 1.2, November 2002
Copyright © 2000,2001,2002 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
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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 non commercially. 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.
17.1 APPLICABILITY AND DEFINITIONS
17.1 APPLICABILITY AND DEFINITIONS17.1 APPLICABILITY AND DEFINITIONS
17.1 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 worldwide, 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 _t 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 mark-up, or absence of mark-up, 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 mark-up, 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.
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