1130561Sobrien@c -*-texinfo-*-
2130561Sobrien@appendix GNU Free Documentation License
3130561Sobrien@center Version 1.1, March 2000
4130561Sobrien
5130561Sobrien@display
6218822SdimCopyright (C) 2000, 2003 Free Software Foundation, Inc.
7218822Sdim51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
8130561Sobrien
9130561SobrienEveryone is permitted to copy and distribute verbatim copies
10130561Sobrienof this license document, but changing it is not allowed.
11130561Sobrien@end display
12130561Sobrien@sp 1
13130561Sobrien@enumerate 0
14130561Sobrien@item
15130561SobrienPREAMBLE
16130561Sobrien
17130561SobrienThe purpose of this License is to make a manual, textbook, or other
18130561Sobrienwritten document ``free'' in the sense of freedom: to assure everyone
19130561Sobrienthe effective freedom to copy and redistribute it, with or without
20130561Sobrienmodifying it, either commercially or noncommercially.  Secondarily,
21130561Sobrienthis License preserves for the author and publisher a way to get
22130561Sobriencredit for their work, while not being considered responsible for
23130561Sobrienmodifications made by others.
24130561Sobrien
25130561SobrienThis License is a kind of ``copyleft'', which means that derivative
26130561Sobrienworks of the document must themselves be free in the same sense.  It
27130561Sobriencomplements the GNU General Public License, which is a copyleft
28130561Sobrienlicense designed for free software.
29130561Sobrien
30130561SobrienWe have designed this License in order to use it for manuals for free
31130561Sobriensoftware, because free software needs free documentation: a free
32130561Sobrienprogram should come with manuals providing the same freedoms that the
33130561Sobriensoftware does.  But this License is not limited to software manuals;
34130561Sobrienit can be used for any textual work, regardless of subject matter or
35130561Sobrienwhether it is published as a printed book.  We recommend this License
36130561Sobrienprincipally for works whose purpose is instruction or reference.
37130561Sobrien
38130561Sobrien@sp 1
39130561Sobrien@item
40130561SobrienAPPLICABILITY AND DEFINITIONS
41130561Sobrien
42130561SobrienThis License applies to any manual or other work that contains a
43130561Sobriennotice placed by the copyright holder saying it can be distributed
44130561Sobrienunder the terms of this License.  The ``Document'', below, refers to any
45130561Sobriensuch manual or work.  Any member of the public is a licensee, and is
46130561Sobrienaddressed as ``you.''
47130561Sobrien
48130561SobrienA ``Modified Version'' of the Document means any work containing the
49130561SobrienDocument or a portion of it, either copied verbatim, or with
50130561Sobrienmodifications and/or translated into another language.
51130561Sobrien
52130561SobrienA ``Secondary Section'' is a named appendix or a front-matter section of
53130561Sobrienthe Document that deals exclusively with the relationship of the
54130561Sobrienpublishers or authors of the Document to the Document's overall subject
55130561Sobrien(or to related matters) and contains nothing that could fall directly
56130561Sobrienwithin that overall subject.  (For example, if the Document is in part a
57130561Sobrientextbook of mathematics, a Secondary Section may not explain any
58130561Sobrienmathematics.)  The relationship could be a matter of historical
59130561Sobrienconnection with the subject or with related matters, or of legal,
60130561Sobriencommercial, philosophical, ethical or political position regarding
61130561Sobrienthem.
62130561Sobrien
63130561SobrienThe ``Invariant Sections'' are certain Secondary Sections whose titles
64130561Sobrienare designated, as being those of Invariant Sections, in the notice
65130561Sobrienthat says that the Document is released under this License.
66130561Sobrien
67130561SobrienThe ``Cover Texts'' are certain short passages of text that are listed,
68130561Sobrienas Front-Cover Texts or Back-Cover Texts, in the notice that says that
69130561Sobrienthe Document is released under this License.
70130561Sobrien
71130561SobrienA ``Transparent'' copy of the Document means a machine-readable copy,
72130561Sobrienrepresented in a format whose specification is available to the
73130561Sobriengeneral public, whose contents can be viewed and edited directly and
74130561Sobrienstraightforwardly with generic text editors or (for images composed of
75130561Sobrienpixels) generic paint programs or (for drawings) some widely available
76130561Sobriendrawing editor, and that is suitable for input to text formatters or
77130561Sobrienfor automatic translation to a variety of formats suitable for input
78130561Sobriento text formatters.  A copy made in an otherwise Transparent file
79130561Sobrienformat whose markup has been designed to thwart or discourage
80130561Sobriensubsequent modification by readers is not Transparent.  A copy that is
81130561Sobriennot ``Transparent'' is called ``Opaque.''
82130561Sobrien
83130561SobrienExamples of suitable formats for Transparent copies include plain
84130561SobrienASCII without markup, Texinfo input format, LaTeX input format, SGML
85130561Sobrienor XML using a publicly available DTD, and standard-conforming simple
86130561SobrienHTML designed for human modification.  Opaque formats include
87130561SobrienPostScript, PDF, proprietary formats that can be read and edited only
88130561Sobrienby proprietary word processors, SGML or XML for which the DTD and/or
89130561Sobrienprocessing tools are not generally available, and the
90130561Sobrienmachine-generated HTML produced by some word processors for output
91130561Sobrienpurposes only.
92130561Sobrien
93130561SobrienThe ``Title Page'' means, for a printed book, the title page itself,
94130561Sobrienplus such following pages as are needed to hold, legibly, the material
95130561Sobrienthis License requires to appear in the title page.  For works in
96130561Sobrienformats which do not have any title page as such, ``Title Page'' means
97130561Sobrienthe text near the most prominent appearance of the work's title,
98130561Sobrienpreceding the beginning of the body of the text.
99130561Sobrien@sp 1
100130561Sobrien@item
101130561SobrienVERBATIM COPYING
102130561Sobrien
103130561SobrienYou may copy and distribute the Document in any medium, either
104130561Sobriencommercially or noncommercially, provided that this License, the
105130561Sobriencopyright notices, and the license notice saying this License applies
106130561Sobriento the Document are reproduced in all copies, and that you add no other
107130561Sobrienconditions whatsoever to those of this License.  You may not use
108130561Sobrientechnical measures to obstruct or control the reading or further
109130561Sobriencopying of the copies you make or distribute.  However, you may accept
110130561Sobriencompensation in exchange for copies.  If you distribute a large enough
111130561Sobriennumber of copies you must also follow the conditions in section 3.
112130561Sobrien
113130561SobrienYou may also lend copies, under the same conditions stated above, and
114130561Sobrienyou may publicly display copies.
115130561Sobrien@sp 1
116130561Sobrien@item
117130561SobrienCOPYING IN QUANTITY
118130561Sobrien
119130561SobrienIf you publish printed copies of the Document numbering more than 100,
120130561Sobrienand the Document's license notice requires Cover Texts, you must enclose
121130561Sobrienthe copies in covers that carry, clearly and legibly, all these Cover
122130561SobrienTexts: Front-Cover Texts on the front cover, and Back-Cover Texts on
123130561Sobrienthe back cover.  Both covers must also clearly and legibly identify
124130561Sobrienyou as the publisher of these copies.  The front cover must present
125130561Sobrienthe full title with all words of the title equally prominent and
126130561Sobrienvisible.  You may add other material on the covers in addition.
127130561SobrienCopying with changes limited to the covers, as long as they preserve
128130561Sobrienthe title of the Document and satisfy these conditions, can be treated
129130561Sobrienas verbatim copying in other respects.
130130561Sobrien
131130561SobrienIf the required texts for either cover are too voluminous to fit
132130561Sobrienlegibly, you should put the first ones listed (as many as fit
133130561Sobrienreasonably) on the actual cover, and continue the rest onto adjacent
134130561Sobrienpages.
135130561Sobrien
136130561SobrienIf you publish or distribute Opaque copies of the Document numbering
137130561Sobrienmore than 100, you must either include a machine-readable Transparent
138130561Sobriencopy along with each Opaque copy, or state in or with each Opaque copy
139130561Sobriena publicly-accessible computer-network location containing a complete
140130561SobrienTransparent copy of the Document, free of added material, which the
141130561Sobriengeneral network-using public has access to download anonymously at no
142130561Sobriencharge using public-standard network protocols.  If you use the latter
143130561Sobrienoption, you must take reasonably prudent steps, when you begin
144130561Sobriendistribution of Opaque copies in quantity, to ensure that this
145130561SobrienTransparent copy will remain thus accessible at the stated location
146130561Sobrienuntil at least one year after the last time you distribute an Opaque
147130561Sobriencopy (directly or through your agents or retailers) of that edition to
148130561Sobrienthe public.
149130561Sobrien
150130561SobrienIt is requested, but not required, that you contact the authors of the
151130561SobrienDocument well before redistributing any large number of copies, to give
152130561Sobrienthem a chance to provide you with an updated version of the Document.
153130561Sobrien@sp 1
154130561Sobrien@item
155130561SobrienMODIFICATIONS
156130561Sobrien
157130561SobrienYou may copy and distribute a Modified Version of the Document under
158130561Sobrienthe conditions of sections 2 and 3 above, provided that you release
159130561Sobrienthe Modified Version under precisely this License, with the Modified
160130561SobrienVersion filling the role of the Document, thus licensing distribution
161130561Sobrienand modification of the Modified Version to whoever possesses a copy
162130561Sobrienof it.  In addition, you must do these things in the Modified Version:
163130561Sobrien
164130561SobrienA. Use in the Title Page (and on the covers, if any) a title distinct
165130561Sobrien   from that of the Document, and from those of previous versions
166130561Sobrien   (which should, if there were any, be listed in the History section
167130561Sobrien   of the Document).  You may use the same title as a previous version
168130561Sobrien   if the original publisher of that version gives permission.@*
169130561SobrienB. List on the Title Page, as authors, one or more persons or entities
170130561Sobrien   responsible for authorship of the modifications in the Modified
171130561Sobrien   Version, together with at least five of the principal authors of the
172130561Sobrien   Document (all of its principal authors, if it has less than five).@*
173130561SobrienC. State on the Title page the name of the publisher of the
174130561Sobrien   Modified Version, as the publisher.@*
175130561SobrienD. Preserve all the copyright notices of the Document.@*
176130561SobrienE. Add an appropriate copyright notice for your modifications
177130561Sobrien   adjacent to the other copyright notices.@*
178130561SobrienF. Include, immediately after the copyright notices, a license notice
179130561Sobrien   giving the public permission to use the Modified Version under the
180130561Sobrien   terms of this License, in the form shown in the Addendum below.@*
181130561SobrienG. Preserve in that license notice the full lists of Invariant Sections
182130561Sobrien   and required Cover Texts given in the Document's license notice.@*
183130561SobrienH. Include an unaltered copy of this License.@*
184130561SobrienI. Preserve the section entitled ``History'', and its title, and add to
185130561Sobrien   it an item stating at least the title, year, new authors, and
186130561Sobrien   publisher of the Modified Version as given on the Title Page.  If
187130561Sobrien   there is no section entitled ``History'' in the Document, create one
188130561Sobrien   stating the title, year, authors, and publisher of the Document as
189130561Sobrien   given on its Title Page, then add an item describing the Modified
190130561Sobrien   Version as stated in the previous sentence.@*
191130561SobrienJ. Preserve the network location, if any, given in the Document for
192130561Sobrien   public access to a Transparent copy of the Document, and likewise
193130561Sobrien   the network locations given in the Document for previous versions
194130561Sobrien   it was based on.  These may be placed in the ``History'' section.
195130561Sobrien   You may omit a network location for a work that was published at
196130561Sobrien   least four years before the Document itself, or if the original
197130561Sobrien   publisher of the version it refers to gives permission.@*
198130561SobrienK. In any section entitled ``Acknowledgements'' or ``Dedications'',
199130561Sobrien   preserve the section's title, and preserve in the section all the
200130561Sobrien   substance and tone of each of the contributor acknowledgements
201130561Sobrien   and/or dedications given therein.@*
202130561SobrienL. Preserve all the Invariant Sections of the Document,
203130561Sobrien   unaltered in their text and in their titles.  Section numbers
204130561Sobrien   or the equivalent are not considered part of the section titles.@*
205130561SobrienM. Delete any section entitled ``Endorsements.''  Such a section
206130561Sobrien   may not be included in the Modified Version.@*
207130561SobrienN. Do not retitle any existing section as ``Endorsements''
208130561Sobrien   or to conflict in title with any Invariant Section.@*
209130561Sobrien@sp 1
210130561SobrienIf the Modified Version includes new front-matter sections or
211130561Sobrienappendices that qualify as Secondary Sections and contain no material
212130561Sobriencopied from the Document, you may at your option designate some or all
213130561Sobrienof these sections as invariant.  To do this, add their titles to the
214130561Sobrienlist of Invariant Sections in the Modified Version's license notice.
215130561SobrienThese titles must be distinct from any other section titles.
216130561Sobrien
217130561SobrienYou may add a section entitled ``Endorsements'', provided it contains
218130561Sobriennothing but endorsements of your Modified Version by various
219130561Sobrienparties--for example, statements of peer review or that the text has
220130561Sobrienbeen approved by an organization as the authoritative definition of a
221130561Sobrienstandard.
222130561Sobrien
223130561SobrienYou may add a passage of up to five words as a Front-Cover Text, and a
224130561Sobrienpassage of up to 25 words as a Back-Cover Text, to the end of the list
225130561Sobrienof Cover Texts in the Modified Version.  Only one passage of
226130561SobrienFront-Cover Text and one of Back-Cover Text may be added by (or
227130561Sobrienthrough arrangements made by) any one entity.  If the Document already
228130561Sobrienincludes a cover text for the same cover, previously added by you or
229130561Sobrienby arrangement made by the same entity you are acting on behalf of,
230130561Sobrienyou may not add another; but you may replace the old one, on explicit
231130561Sobrienpermission from the previous publisher that added the old one.
232130561Sobrien
233130561SobrienThe author(s) and publisher(s) of the Document do not by this License
234130561Sobriengive permission to use their names for publicity for or to assert or
235130561Sobrienimply endorsement of any Modified Version.
236130561Sobrien@sp 1
237130561Sobrien@item
238130561SobrienCOMBINING DOCUMENTS
239130561Sobrien
240130561SobrienYou may combine the Document with other documents released under this
241130561SobrienLicense, under the terms defined in section 4 above for modified
242130561Sobrienversions, provided that you include in the combination all of the
243130561SobrienInvariant Sections of all of the original documents, unmodified, and
244130561Sobrienlist them all as Invariant Sections of your combined work in its
245130561Sobrienlicense notice.
246130561Sobrien
247130561SobrienThe combined work need only contain one copy of this License, and
248130561Sobrienmultiple identical Invariant Sections may be replaced with a single
249130561Sobriencopy.  If there are multiple Invariant Sections with the same name but
250130561Sobriendifferent contents, make the title of each such section unique by
251130561Sobrienadding at the end of it, in parentheses, the name of the original
252130561Sobrienauthor or publisher of that section if known, or else a unique number.
253130561SobrienMake the same adjustment to the section titles in the list of
254130561SobrienInvariant Sections in the license notice of the combined work.
255130561Sobrien
256130561SobrienIn the combination, you must combine any sections entitled ``History''
257130561Sobrienin the various original documents, forming one section entitled
258130561Sobrien``History''; likewise combine any sections entitled ``Acknowledgements'',
259130561Sobrienand any sections entitled ``Dedications.''  You must delete all sections
260130561Sobrienentitled ``Endorsements.''
261130561Sobrien@sp 1
262130561Sobrien@item
263130561SobrienCOLLECTIONS OF DOCUMENTS
264130561Sobrien
265130561SobrienYou may make a collection consisting of the Document and other documents
266130561Sobrienreleased under this License, and replace the individual copies of this
267130561SobrienLicense in the various documents with a single copy that is included in
268130561Sobrienthe collection, provided that you follow the rules of this License for
269130561Sobrienverbatim copying of each of the documents in all other respects.
270130561Sobrien
271130561SobrienYou may extract a single document from such a collection, and distribute
272130561Sobrienit individually under this License, provided you insert a copy of this
273130561SobrienLicense into the extracted document, and follow this License in all
274130561Sobrienother respects regarding verbatim copying of that document.
275130561Sobrien@sp 1
276130561Sobrien@item
277130561SobrienAGGREGATION WITH INDEPENDENT WORKS
278130561Sobrien
279130561SobrienA compilation of the Document or its derivatives with other separate
280130561Sobrienand independent documents or works, in or on a volume of a storage or
281130561Sobriendistribution medium, does not as a whole count as a Modified Version
282130561Sobrienof the Document, provided no compilation copyright is claimed for the
283130561Sobriencompilation.  Such a compilation is called an ``aggregate'', and this
284130561SobrienLicense does not apply to the other self-contained works thus compiled
285130561Sobrienwith the Document, on account of their being thus compiled, if they
286130561Sobrienare not themselves derivative works of the Document.
287130561Sobrien
288130561SobrienIf the Cover Text requirement of section 3 is applicable to these
289130561Sobriencopies of the Document, then if the Document is less than one quarter
290130561Sobrienof the entire aggregate, the Document's Cover Texts may be placed on
291130561Sobriencovers that surround only the Document within the aggregate.
292130561SobrienOtherwise they must appear on covers around the whole aggregate.
293130561Sobrien@sp 1
294130561Sobrien@item
295130561SobrienTRANSLATION
296130561Sobrien
297130561SobrienTranslation is considered a kind of modification, so you may
298130561Sobriendistribute translations of the Document under the terms of section 4.
299130561SobrienReplacing Invariant Sections with translations requires special
300130561Sobrienpermission from their copyright holders, but you may include
301130561Sobrientranslations of some or all Invariant Sections in addition to the
302130561Sobrienoriginal versions of these Invariant Sections.  You may include a
303130561Sobrientranslation of this License provided that you also include the
304130561Sobrienoriginal English version of this License.  In case of a disagreement
305130561Sobrienbetween the translation and the original English version of this
306130561SobrienLicense, the original English version will prevail.
307130561Sobrien@sp 1
308130561Sobrien@item
309130561SobrienTERMINATION
310130561Sobrien
311130561SobrienYou may not copy, modify, sublicense, or distribute the Document except
312130561Sobrienas expressly provided for under this License.  Any other attempt to
313130561Sobriencopy, modify, sublicense or distribute the Document is void, and will
314130561Sobrienautomatically terminate your rights under this License.  However,
315130561Sobrienparties who have received copies, or rights, from you under this
316130561SobrienLicense will not have their licenses terminated so long as such
317130561Sobrienparties remain in full compliance.
318130561Sobrien@sp 1
319130561Sobrien@item
320130561SobrienFUTURE REVISIONS OF THIS LICENSE
321130561Sobrien
322130561SobrienThe Free Software Foundation may publish new, revised versions
323130561Sobrienof the GNU Free Documentation License from time to time.  Such new
324130561Sobrienversions will be similar in spirit to the present version, but may
325130561Sobriendiffer in detail to address new problems or concerns.  See
326130561Sobrienhttp://www.gnu.org/copyleft/.
327130561Sobrien
328130561SobrienEach version of the License is given a distinguishing version number.
329130561SobrienIf the Document specifies that a particular numbered version of this
330130561SobrienLicense ``or any later version'' applies to it, you have the option of
331130561Sobrienfollowing the terms and conditions either of that specified version or
332130561Sobrienof any later version that has been published (not as a draft) by the
333130561SobrienFree Software Foundation.  If the Document does not specify a version
334130561Sobriennumber of this License, you may choose any version ever published (not
335130561Sobrienas a draft) by the Free Software Foundation.
336130561Sobrien
337130561Sobrien@end enumerate
338130561Sobrien
339130561Sobrien@unnumberedsec ADDENDUM: How to use this License for your documents
340130561Sobrien
341130561SobrienTo use this License in a document you have written, include a copy of
342130561Sobrienthe License in the document and put the following copyright and
343130561Sobrienlicense notices just after the title page:
344130561Sobrien
345130561Sobrien@smallexample
346130561Sobrien@group
347130561SobrienCopyright (C)  @var{year}  @var{your name}.
348130561SobrienPermission is granted to copy, distribute and/or modify this document
349130561Sobrienunder the terms of the GNU Free Documentation License, Version 1.1
350130561Sobrienor any later version published by the Free Software Foundation;
351130561Sobrienwith the Invariant Sections being @var{list their titles}, with the
352130561SobrienFront-Cover Texts being @var{list}, and with the Back-Cover Texts being @var{list}.
353130561SobrienA copy of the license is included in the section entitled "GNU
354130561SobrienFree Documentation License."
355130561Sobrien@end group
356130561Sobrien@end smallexample
357130561Sobrien
358130561SobrienIf you have no Invariant Sections, write ``with no Invariant Sections''
359130561Sobrieninstead of saying which ones are invariant.  If you have no
360130561SobrienFront-Cover Texts, write ``no Front-Cover Texts'' instead of
361130561Sobrien``Front-Cover Texts being @var{list}''; likewise for Back-Cover Texts.
362130561Sobrien
363130561SobrienIf your document contains nontrivial examples of program code, we
364130561Sobrienrecommend releasing these examples in parallel under your choice of
365130561Sobrienfree software license, such as the GNU General Public License,
366130561Sobriento permit their use in free software.
367