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- GNU Free Documentation License
- Version 1.1, March 2000
- Copyright (C) 2000 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.
- 0. PREAMBLE
- The purpose of this License is to make a manual, textbook, or other
- written 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 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.
- 1. APPLICABILITY AND DEFINITIONS
- This License applies to any manual or other work that contains a
- notice placed by the copyright holder saying it can be distributed
- under the terms of this License. The "Document", below, refers to any
- such manual or work. Any member of the public is a licensee, and is
- addressed as "you".
- 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. (For example, 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.
- 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 "Transparent" copy of the Document means a machine-readable copy,
- represented in a format whose specification is available to the
- general public, whose contents can be viewed and edited directly and
- 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 has been designed to thwart or discourage
- subsequent modification by readers is not Transparent. A copy that is
- not "Transparent" is called "Opaque".
- 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 designed for human modification. Opaque formats include
- PostScript, PDF, 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 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.
- 2. 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.
- 3. COPYING IN QUANTITY
- If you publish printed copies 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 publicly-accessible computer-network location containing a complete
- Transparent copy of the Document, free of added material, which the
- general network-using public has access to download anonymously at no
- charge using public-standard network protocols. 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.
- 4. 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:
- A. 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.
- B. 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 less than five).
- C. State on the Title page the name of the publisher of the
- Modified Version, as the publisher.
- D. Preserve all the copyright notices of the Document.
- E. Add an appropriate copyright notice for your modifications
- adjacent to the other copyright notices.
- F. 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.
- G. Preserve in that license notice the full lists of Invariant Sections
- and required Cover Texts given in the Document's license notice.
- H. Include an unaltered copy of this License.
- I. Preserve the section entitled "History", and 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.
- J. 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.
- K. In any section entitled "Acknowledgements" or "Dedications",
- preserve the section's title, and preserve in the section all the
- substance and tone of each of the contributor acknowledgements
- and/or dedications given therein.
- L. 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.
- M. Delete any section entitled "Endorsements". Such a section
- may not be included in the Modified Version.
- N. Do not retitle any existing section as "Endorsements"
- or to conflict in title with any Invariant Section.
- 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.
- 5. 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.
- 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."
- 6. 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.
- 7. 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, does not as a whole count as a 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 these
- copies of the Document, then if the Document is less than one quarter
- of the entire aggregate, the Document's Cover Texts may be placed on
- covers that surround only the Document within the aggregate.
- Otherwise they must appear on covers around the whole aggregate.
- 8. 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 provided that you also include the
- original English version of this License. In case of a disagreement
- between the translation and the original English version of this
- License, the original English version will prevail.
- 9. 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.
- 10. FUTURE REVISIONS OF THIS LICENSE
- 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 version, but may
- differ in detail to address new problems or concerns. See
- http://www.gnu.org/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.
- ADDENDUM: How to use this License for your documents
- To use this License in a document you have written, include a copy of
- the License in the document and put the following copyright and
- license notices just after the title page:
- Copyright (c) YEAR YOUR NAME.
- Permission is granted to copy, distribute and/or modify this document
- under the terms of the GNU Free Documentation License, Version 1.1
- or any later version published by the Free Software Foundation;
- with the Invariant Sections being LIST THEIR TITLES, with the
- Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
- A copy of the license is included in the section entitled "GNU
- Free Documentation License".
- If you have no Invariant Sections, write "with no Invariant Sections"
- instead of saying which ones are invariant. If you have no
- Front-Cover Texts, write "no Front-Cover Texts" instead of
- "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.
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