2 @node GNU Free Documentation License
3 @appendixsec GNU Free Documentation License
5 @cindex FDL, GNU Free Documentation License
6 @center Version 1.1, March 2000
9 Copyright @copyright{} 2000 Free Software Foundation, Inc.
10 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
12 Everyone is permitted to copy and distribute verbatim copies
13 of this license document, but changing it is not allowed.
20 The purpose of this License is to make a manual, textbook, or other
21 written document @dfn{free} in the sense of freedom: to assure everyone
22 the effective freedom to copy and redistribute it, with or without
23 modifying it, either commercially or noncommercially. Secondarily,
24 this License preserves for the author and publisher a way to get
25 credit for their work, while not being considered responsible for
26 modifications made by others.
28 This License is a kind of ``copyleft'', which means that derivative
29 works of the document must themselves be free in the same sense. It
30 complements the GNU General Public License, which is a copyleft
31 license designed for free software.
33 We have designed this License in order to use it for manuals for free
34 software, because free software needs free documentation: a free
35 program should come with manuals providing the same freedoms that the
36 software does. But this License is not limited to software manuals;
37 it can be used for any textual work, regardless of subject matter or
38 whether it is published as a printed book. We recommend this License
39 principally for works whose purpose is instruction or reference.
42 APPLICABILITY AND DEFINITIONS
44 This License applies to any manual or other work that contains a
45 notice placed by the copyright holder saying it can be distributed
46 under the terms of this License. The ``Document'', below, refers to any
47 such manual or work. Any member of the public is a licensee, and is
50 A ``Modified Version'' of the Document means any work containing the
51 Document or a portion of it, either copied verbatim, or with
52 modifications and/or translated into another language.
54 A ``Secondary Section'' is a named appendix or a front-matter section of
55 the Document that deals exclusively with the relationship of the
56 publishers or authors of the Document to the Document's overall subject
57 (or to related matters) and contains nothing that could fall directly
58 within that overall subject. (For example, if the Document is in part a
59 textbook of mathematics, a Secondary Section may not explain any
60 mathematics.) The relationship could be a matter of historical
61 connection with the subject or with related matters, or of legal,
62 commercial, philosophical, ethical or political position regarding
65 The ``Invariant Sections'' are certain Secondary Sections whose titles
66 are designated, as being those of Invariant Sections, in the notice
67 that says that the Document is released under this License.
69 The ``Cover Texts'' are certain short passages of text that are listed,
70 as Front-Cover Texts or Back-Cover Texts, in the notice that says that
71 the Document is released under this License.
73 A ``Transparent'' copy of the Document means a machine-readable copy,
74 represented in a format whose specification is available to the
75 general public, whose contents can be viewed and edited directly and
76 straightforwardly with generic text editors or (for images composed of
77 pixels) generic paint programs or (for drawings) some widely available
78 drawing editor, and that is suitable for input to text formatters or
79 for automatic translation to a variety of formats suitable for input
80 to text formatters. A copy made in an otherwise Transparent file
81 format whose markup has been designed to thwart or discourage
82 subsequent modification by readers is not Transparent. A copy that is
83 not ``Transparent'' is called ``Opaque''.
85 Examples of suitable formats for Transparent copies include plain
86 @sc{ascii} without markup, Texinfo input format, La@TeX{} input format,
87 @acronym{SGML} or @acronym{XML} using a publicly available
88 @acronym{DTD}, and standard-conforming simple @acronym{HTML} designed
89 for human modification. Opaque formats include PostScript,
90 @acronym{PDF}, proprietary formats that can be read and edited only by
91 proprietary word processors, @acronym{SGML} or @acronym{XML} for which
92 the @acronym{DTD} and/or processing tools are not generally available,
93 and the machine-generated @acronym{HTML} produced by some word
94 processors for output purposes only.
96 The ``Title Page'' means, for a printed book, the title page itself,
97 plus such following pages as are needed to hold, legibly, the material
98 this License requires to appear in the title page. For works in
99 formats which do not have any title page as such, ``Title Page'' means
100 the text near the most prominent appearance of the work's title,
101 preceding the beginning of the body of the text.
106 You may copy and distribute the Document in any medium, either
107 commercially or noncommercially, provided that this License, the
108 copyright notices, and the license notice saying this License applies
109 to the Document are reproduced in all copies, and that you add no other
110 conditions whatsoever to those of this License. You may not use
111 technical measures to obstruct or control the reading or further
112 copying of the copies you make or distribute. However, you may accept
113 compensation in exchange for copies. If you distribute a large enough
114 number of copies you must also follow the conditions in section 3.
116 You may also lend copies, under the same conditions stated above, and
117 you may publicly display copies.
122 If you publish printed copies of the Document numbering more than 100,
123 and the Document's license notice requires Cover Texts, you must enclose
124 the copies in covers that carry, clearly and legibly, all these Cover
125 Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
126 the back cover. Both covers must also clearly and legibly identify
127 you as the publisher of these copies. The front cover must present
128 the full title with all words of the title equally prominent and
129 visible. You may add other material on the covers in addition.
130 Copying with changes limited to the covers, as long as they preserve
131 the title of the Document and satisfy these conditions, can be treated
132 as verbatim copying in other respects.
134 If the required texts for either cover are too voluminous to fit
135 legibly, you should put the first ones listed (as many as fit
136 reasonably) on the actual cover, and continue the rest onto adjacent
139 If you publish or distribute Opaque copies of the Document numbering
140 more than 100, you must either include a machine-readable Transparent
141 copy along with each Opaque copy, or state in or with each Opaque copy
142 a publicly-accessible computer-network location containing a complete
143 Transparent copy of the Document, free of added material, which the
144 general network-using public has access to download anonymously at no
145 charge using public-standard network protocols. If you use the latter
146 option, you must take reasonably prudent steps, when you begin
147 distribution of Opaque copies in quantity, to ensure that this
148 Transparent copy will remain thus accessible at the stated location
149 until at least one year after the last time you distribute an Opaque
150 copy (directly or through your agents or retailers) of that edition to
153 It is requested, but not required, that you contact the authors of the
154 Document well before redistributing any large number of copies, to give
155 them a chance to provide you with an updated version of the Document.
160 You may copy and distribute a Modified Version of the Document under
161 the conditions of sections 2 and 3 above, provided that you release
162 the Modified Version under precisely this License, with the Modified
163 Version filling the role of the Document, thus licensing distribution
164 and modification of the Modified Version to whoever possesses a copy
165 of it. In addition, you must do these things in the Modified Version:
169 Use in the Title Page (and on the covers, if any) a title distinct
170 from that of the Document, and from those of previous versions
171 (which should, if there were any, be listed in the History section
172 of the Document). You may use the same title as a previous version
173 if the original publisher of that version gives permission.
176 List on the Title Page, as authors, one or more persons or entities
177 responsible for authorship of the modifications in the Modified
178 Version, together with at least five of the principal authors of the
179 Document (all of its principal authors, if it has less than five).
182 State on the Title page the name of the publisher of the
183 Modified Version, as the publisher.
186 Preserve all the copyright notices of the Document.
189 Add an appropriate copyright notice for your modifications
190 adjacent to the other copyright notices.
193 Include, immediately after the copyright notices, a license notice
194 giving the public permission to use the Modified Version under the
195 terms of this License, in the form shown in the Addendum below.
198 Preserve in that license notice the full lists of Invariant Sections
199 and required Cover Texts given in the Document's license notice.
202 Include an unaltered copy of this License.
205 Preserve the section entitled ``History'', and its title, and add to
206 it an item stating at least the title, year, new authors, and
207 publisher of the Modified Version as given on the Title Page. If
208 there is no section entitled ``History'' in the Document, create one
209 stating the title, year, authors, and publisher of the Document as
210 given on its Title Page, then add an item describing the Modified
211 Version as stated in the previous sentence.
214 Preserve the network location, if any, given in the Document for
215 public access to a Transparent copy of the Document, and likewise
216 the network locations given in the Document for previous versions
217 it was based on. These may be placed in the ``History'' section.
218 You may omit a network location for a work that was published at
219 least four years before the Document itself, or if the original
220 publisher of the version it refers to gives permission.
223 In any section entitled ``Acknowledgments'' or ``Dedications'',
224 preserve the section's title, and preserve in the section all the
225 substance and tone of each of the contributor acknowledgments
226 and/or dedications given therein.
229 Preserve all the Invariant Sections of the Document,
230 unaltered in their text and in their titles. Section numbers
231 or the equivalent are not considered part of the section titles.
234 Delete any section entitled ``Endorsements''. Such a section
235 may not be included in the Modified Version.
238 Do not retitle any existing section as ``Endorsements''
239 or to conflict in title with any Invariant Section.
242 If the Modified Version includes new front-matter sections or
243 appendices that qualify as Secondary Sections and contain no material
244 copied from the Document, you may at your option designate some or all
245 of these sections as invariant. To do this, add their titles to the
246 list of Invariant Sections in the Modified Version's license notice.
247 These titles must be distinct from any other section titles.
249 You may add a section entitled ``Endorsements'', provided it contains
250 nothing but endorsements of your Modified Version by various
251 parties---for example, statements of peer review or that the text has
252 been approved by an organization as the authoritative definition of a
255 You may add a passage of up to five words as a Front-Cover Text, and a
256 passage of up to 25 words as a Back-Cover Text, to the end of the list
257 of Cover Texts in the Modified Version. Only one passage of
258 Front-Cover Text and one of Back-Cover Text may be added by (or
259 through arrangements made by) any one entity. If the Document already
260 includes a cover text for the same cover, previously added by you or
261 by arrangement made by the same entity you are acting on behalf of,
262 you may not add another; but you may replace the old one, on explicit
263 permission from the previous publisher that added the old one.
265 The author(s) and publisher(s) of the Document do not by this License
266 give permission to use their names for publicity for or to assert or
267 imply endorsement of any Modified Version.
272 You may combine the Document with other documents released under this
273 License, under the terms defined in section 4 above for modified
274 versions, provided that you include in the combination all of the
275 Invariant Sections of all of the original documents, unmodified, and
276 list them all as Invariant Sections of your combined work in its
279 The combined work need only contain one copy of this License, and
280 multiple identical Invariant Sections may be replaced with a single
281 copy. If there are multiple Invariant Sections with the same name but
282 different contents, make the title of each such section unique by
283 adding at the end of it, in parentheses, the name of the original
284 author or publisher of that section if known, or else a unique number.
285 Make the same adjustment to the section titles in the list of
286 Invariant Sections in the license notice of the combined work.
288 In the combination, you must combine any sections entitled ``History''
289 in the various original documents, forming one section entitled
290 ``History''; likewise combine any sections entitled ``Acknowledgments'',
291 and any sections entitled ``Dedications''. You must delete all sections
292 entitled ``Endorsements.''
295 COLLECTIONS OF DOCUMENTS
297 You may make a collection consisting of the Document and other documents
298 released under this License, and replace the individual copies of this
299 License in the various documents with a single copy that is included in
300 the collection, provided that you follow the rules of this License for
301 verbatim copying of each of the documents in all other respects.
303 You may extract a single document from such a collection, and distribute
304 it individually under this License, provided you insert a copy of this
305 License into the extracted document, and follow this License in all
306 other respects regarding verbatim copying of that document.
309 AGGREGATION WITH INDEPENDENT WORKS
311 A compilation of the Document or its derivatives with other separate
312 and independent documents or works, in or on a volume of a storage or
313 distribution medium, does not as a whole count as a Modified Version
314 of the Document, provided no compilation copyright is claimed for the
315 compilation. Such a compilation is called an ``aggregate'', and this
316 License does not apply to the other self-contained works thus compiled
317 with the Document, on account of their being thus compiled, if they
318 are not themselves derivative works of the Document.
320 If the Cover Text requirement of section 3 is applicable to these
321 copies of the Document, then if the Document is less than one quarter
322 of the entire aggregate, the Document's Cover Texts may be placed on
323 covers that surround only the Document within the aggregate.
324 Otherwise they must appear on covers around the whole aggregate.
329 Translation is considered a kind of modification, so you may
330 distribute translations of the Document under the terms of section 4.
331 Replacing Invariant Sections with translations requires special
332 permission from their copyright holders, but you may include
333 translations of some or all Invariant Sections in addition to the
334 original versions of these Invariant Sections. You may include a
335 translation of this License provided that you also include the
336 original English version of this License. In case of a disagreement
337 between the translation and the original English version of this
338 License, the original English version will prevail.
343 You may not copy, modify, sublicense, or distribute the Document except
344 as expressly provided for under this License. Any other attempt to
345 copy, modify, sublicense or distribute the Document is void, and will
346 automatically terminate your rights under this License. However,
347 parties who have received copies, or rights, from you under this
348 License will not have their licenses terminated so long as such
349 parties remain in full compliance.
352 FUTURE REVISIONS OF THIS LICENSE
354 The Free Software Foundation may publish new, revised versions
355 of the GNU Free Documentation License from time to time. Such new
356 versions will be similar in spirit to the present version, but may
357 differ in detail to address new problems or concerns. See
358 @uref{http://www.gnu.org/copyleft/}.
360 Each version of the License is given a distinguishing version number.
361 If the Document specifies that a particular numbered version of this
362 License ``or any later version'' applies to it, you have the option of
363 following the terms and conditions either of that specified version or
364 of any later version that has been published (not as a draft) by the
365 Free Software Foundation. If the Document does not specify a version
366 number of this License, you may choose any version ever published (not
367 as a draft) by the Free Software Foundation.
371 @appendixsubsec ADDENDUM: How to use this License for your documents
373 To use this License in a document you have written, include a copy of
374 the License in the document and put the following copyright and
375 license notices just after the title page:
379 Copyright (C) @var{year} @var{your name}.
380 Permission is granted to copy, distribute and/or modify this document
381 under the terms of the GNU Free Documentation License, Version 1.1
382 or any later version published by the Free Software Foundation;
383 with the Invariant Sections being @var{list their titles}, with the
384 Front-Cover Texts being @var{list}, and with the Back-Cover Texts being @var{list}.
385 A copy of the license is included in the section entitled ``GNU
386 Free Documentation License''.
390 If you have no Invariant Sections, write ``with no Invariant Sections''
391 instead of saying which ones are invariant. If you have no
392 Front-Cover Texts, write ``no Front-Cover Texts'' instead of
393 ``Front-Cover Texts being @var{list}''; likewise for Back-Cover Texts.
395 If your document contains nontrivial examples of program code, we
396 recommend releasing these examples in parallel under your choice of
397 free software license, such as the GNU General Public License,
398 to permit their use in free software.
401 @c ispell-local-pdict: "ispell-dict"