The purpose of this License is to make a manual, textbook,
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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
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This License applies to any manual or other work that
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You may copy and distribute a Modified Version of the
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You may combine the Document with other documents released
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must delete all sections entitled "Endorsements."
You may make a collection consisting of the Document and
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A compilation of the Document or its derivatives with other
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Modified Version of the Document, provided no compilation
copyright is claimed for the compilation. Such a compilation is
called an "aggregate", and this License does not apply to the
other self-contained works thus compiled with the Document, on
account of their being thus compiled, if they are not themselves
derivative works of the Document.If the Cover Text requirement of section 3 is applicable to
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Translation is considered a kind of modification, so you may
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4. Replacing Invariant Sections with translations requires
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include translations of some or all Invariant Sections in addition
to the original versions of these Invariant Sections. You may
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You may not copy, modify, sublicense, or distribute the
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The Free Software Foundation may publish new, revised
versions of the GNU Free Documentation License from time to time.
Such new versions will be similar in spirit to the present
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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
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To use this License in a document you have written, include
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Sections" instead of saying which ones are invariant. If you have
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"Front-Cover Texts being LIST"; likewise for Back-Cover
Texts.If your document contains nontrivial examples of program
code, we recommend releasing these examples in parallel under your
choice of free software license, such as the GNU General Public
License, to permit their use in free software.