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15 <H1>GNU Free Documentation License</H1>
16 Version 1.1, March 2000
17
18 <P>Copyright (C) 2000 Free Software Foundation, Inc.
19 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA<BR>
20 Everyone is permitted to copy and distribute verbatim copies
21 of this license document, but changing it is not allowed.</P>
22
23 <H2>0. Preamble</H2>
24
25 <P>The purpose of this License is to make a manual, textbook, or other
26 written document "free" in the sense of freedom: to assure everyone
27 the effective freedom to copy and redistribute it, with or without
28 modifying it, either commercially or noncommercially. Secondarily,
29 this License preserves for the author and publisher a way to get
30 credit for their work, while not being considered responsible for
31 modifications made by others.</P>
32
33 <P>This License is a kind of "copyleft", which means that derivative
34 works of the document must themselves be free in the same sense. It
35 complements the GNU General Public License, which is a copyleft
36 license designed for free software.</P>
37
38 <P>We have designed this License in order to use it for manuals for free
39 software, because free software needs free documentation: a free
40 program should come with manuals providing the same freedoms that the
41 software does. But this License is not limited to software manuals;
42 it can be used for any textual work, regardless of subject matter or
43 whether it is published as a printed book. We recommend this License
44 principally for works whose purpose is instruction or reference.</P>
45
46 <H2>1. Applicability And Definitions</H2>
47
48 <P>This License applies to any manual or other work that contains a
49 notice placed by the copyright holder saying it can be distributed
50 under the terms of this License. The "Document", below, refers to any
51 such manual or work. Any member of the public is a licensee, and is
52 addressed as "you".</P>
53
54 <P>A "Modified Version" of the Document means any work containing the
55 Document or a portion of it, either copied verbatim, or with
56 modifications and/or translated into another language.</P>
57
58 <P>A "Secondary Section" is a named appendix or a front-matter section of
59 the Document that deals exclusively with the relationship of the
60 publishers or authors of the Document to the Document's overall subject
61 (or to related matters) and contains nothing that could fall directly
62 within that overall subject. (For example, if the Document is in part a
63 textbook of mathematics, a Secondary Section may not explain any
64 mathematics.) The relationship could be a matter of historical
65 connection with the subject or with related matters, or of legal,
66 commercial, philosophical, ethical or political position regarding
67 them.</P>
68
69 <P>The "Invariant Sections" are certain Secondary Sections whose titles
70 are designated, as being those of Invariant Sections, in the notice
71 that says that the Document is released under this License.</P>
72
73 <P>The "Cover Texts" are certain short passages of text that are listed,
74 as Front-Cover Texts or Back-Cover Texts, in the notice that says that
75 the Document is released under this License.</P>
76
77 <P>A "Transparent" copy of the Document means a machine-readable copy,
78 represented in a format whose specification is available to the
79 general public, whose contents can be viewed and edited directly and
80 straightforwardly with generic text editors or (for images composed of
81 pixels) generic paint programs or (for drawings) some widely available
82 drawing editor, and that is suitable for input to text formatters or
83 for automatic translation to a variety of formats suitable for input
84 to text formatters. A copy made in an otherwise Transparent file
85 format whose markup has been designed to thwart or discourage
86 subsequent modification by readers is not Transparent. A copy that is
87 not "Transparent" is called "Opaque".</P>
88
89 <P>Examples of suitable formats for Transparent copies include plain
90 ASCII without markup, Texinfo input format, LaTeX input format, SGML
91 or XML using a publicly available DTD, and standard-conforming simple
92 HTML designed for human modification. Opaque formats include
93 PostScript, PDF, proprietary formats that can be read and edited only
94 by proprietary word processors, SGML or XML for which the DTD and/or
95 processing tools are not generally available, and the
96 machine-generated HTML produced by some word processors for output
97 purposes only.</P>
98
99 <P>The "Title Page" means, for a printed book, the title page itself,
100 plus such following pages as are needed to hold, legibly, the material
101 this License requires to appear in the title page. For works in
102 formats which do not have any title page as such, "Title Page" means
103 the text near the most prominent appearance of the work's title,
104 preceding the beginning of the body of the text.</P>
105
106 <H2>2. Verbatim Copying</H2>
107
108 <P>You may copy and distribute the Document in any medium, either
109 commercially or noncommercially, provided that this License, the
110 copyright notices, and the license notice saying this License applies
111 to the Document are reproduced in all copies, and that you add no other
112 conditions whatsoever to those of this License. You may not use
113 technical measures to obstruct or control the reading or further
114 copying of the copies you make or distribute. However, you may accept
115 compensation in exchange for copies. If you distribute a large enough
116 number of copies you must also follow the conditions in section 3.</P>
117
118 <P>You may also lend copies, under the same conditions stated above, and
119 you may publicly display copies.</P>
120
121 <H2>3. Copying In Quantity</H2>
122
123 <P>If you publish printed copies of the Document numbering more than 100,
124 and the Document's license notice requires Cover Texts, you must enclose
125 the copies in covers that carry, clearly and legibly, all these Cover
126 Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
127 the back cover. Both covers must also clearly and legibly identify
128 you as the publisher of these copies. The front cover must present
129 the full title with all words of the title equally prominent and
130 visible. You may add other material on the covers in addition.
131 Copying with changes limited to the covers, as long as they preserve
132 the title of the Document and satisfy these conditions, can be treated
133 as verbatim copying in other respects.</P>
134
135 <P>If the required texts for either cover are too voluminous to fit
136 legibly, you should put the first ones listed (as many as fit
137 reasonably) on the actual cover, and continue the rest onto adjacent
138 pages.</P>
139
140 <P>If you publish or distribute Opaque copies of the Document numbering
141 more than 100, you must either include a machine-readable Transparent
142 copy along with each Opaque copy, or state in or with each Opaque copy
143 a publicly-accessible computer-network location containing a complete
144 Transparent copy of the Document, free of added material, which the
145 general network-using public has access to download anonymously at no
146 charge using public-standard network protocols. If you use the latter
147 option, you must take reasonably prudent steps, when you begin
148 distribution of Opaque copies in quantity, to ensure that this
149 Transparent copy will remain thus accessible at the stated location
150 until at least one year after the last time you distribute an Opaque
151 copy (directly or through your agents or retailers) of that edition to
152 the public.</P>
153
154 <P>It is requested, but not required, that you contact the authors of the
155 Document well before redistributing any large number of copies, to give
156 them a chance to provide you with an updated version of the Document.</P>
157
158 <H2>4. Modifications</H2>
159
160 <P>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:</P>
166
167 <OL STYLE="list-style-type: upper-alpha;">
168 <LI>Use in the Title Page (and on the covers, if any) a title distinct
169 from that of the Document, and from those of previous versions
170 (which should, if there were any, be listed in the History section
171 of the Document). You may use the same title as a previous
172 version if the original publisher of that version gives
173 permission.</LI>
174
175 <LI>List on the Title Page, as authors, one or more persons or
176 entities responsible for authorship of the modifications in the
177 Modified Version, together with at least five of the principal
178 authors of the Document (all of its principal authors, if it has
179 less than five).</LI>
180
181 <LI>State on the Title page the name of the publisher of the Modified
182 Version, as the publisher.</LI>
183
184 <LI>Preserve all the copyright notices of the Document.</LI>
185
186 <LI>Add an appropriate copyright notice for your modifications
187 adjacent to the other copyright notices.</LI>
188
189 <LI>Include, immediately after the copyright notices, a license notice
190 giving the public permission to use the Modified Version under the
191 terms of this License, in the form shown in the Addendum
192 below.</LI>
193
194 <LI>Preserve in that license notice the full lists of Invariant
195 Sections and required Cover Texts given in the Document's license
196 notice.</LI>
197
198 <LI>Include an unaltered copy of this License.</LI>
199
200 <LI>Preserve the section entitled "History", and its title, and add to
201 it an item stating at least the title, year, new authors, and
202 publisher of the Modified Version as given on the Title Page. If
203 there is no section entitled "History" in the Document, create one
204 stating the title, year, authors, and publisher of the Document as
205 given on its Title Page, then add an item describing the Modified
206 Version as stated in the previous sentence.</LI>
207
208 <LI>Preserve the network location, if any, given in the Document for
209 public access to a Transparent copy of the Document, and likewise
210 the network locations given in the Document for previous versions
211 it was based on. These may be placed in the "History" section.
212 You may omit a network location for a work that was published at
213 least four years before the Document itself, or if the original
214 publisher of the version it refers to gives permission.</LI>
215
216 <LI>In any section entitled "Acknowledgements" or "Dedications",
217 preserve the section's title, and preserve in the section all the
218 substance and tone of each of the contributor acknowledgements
219 and/or dedications given therein.</LI>
220
221 <LI>Preserve all the Invariant Sections of the Document, unaltered in
222 their text and in their titles. Section numbers or the equivalent
223 are not considered part of the section titles.</LI>
224
225 <LI>Delete any section entitled "Endorsements". Such a section may
226 not be included in the Modified Version.</LI>
227
228 <LI>Do not retitle any existing section as "Endorsements" or to
229 conflict in title with any Invariant Section.</LI>
230 </OL>
231
232 <P>If the Modified Version includes new front-matter sections or
233 appendices that qualify as Secondary Sections and contain no material
234 copied from the Document, you may at your option designate some or all
235 of these sections as invariant. To do this, add their titles to the
236 list of Invariant Sections in the Modified Version's license notice.
237 These titles must be distinct from any other section titles.</P>
238
239 <P>You may add a section entitled "Endorsements", provided it contains
240 nothing but endorsements of your Modified Version by various
241 parties--for example, statements of peer review or that the text has
242 been approved by an organization as the authoritative definition of a
243 standard.</P>
244
245 <P>You may add a passage of up to five words as a Front-Cover Text, and a
246 passage of up to 25 words as a Back-Cover Text, to the end of the list
247 of Cover Texts in the Modified Version. Only one passage of
248 Front-Cover Text and one of Back-Cover Text may be added by (or
249 through arrangements made by) any one entity. If the Document already
250 includes a cover text for the same cover, previously added by you or
251 by arrangement made by the same entity you are acting on behalf of,
252 you may not add another; but you may replace the old one, on explicit
253 permission from the previous publisher that added the old one.</P>
254
255 <P>The author(s) and publisher(s) of the Document do not by this License
256 give permission to use their names for publicity for or to assert or
257 imply endorsement of any Modified Version.</P>
258
259 <H2>5. Combining Documents</H2>
260
261 <P>You may combine the Document with other documents released under this
262 License, under the terms defined in section 4 above for modified
263 versions, provided that you include in the combination all of the
264 Invariant Sections of all of the original documents, unmodified, and
265 list them all as Invariant Sections of your combined work in its
266 license notice.</P>
267
268 <P>The combined work need only contain one copy of this License, and
269 multiple identical Invariant Sections may be replaced with a single
270 copy. If there are multiple Invariant Sections with the same name but
271 different contents, make the title of each such section unique by
272 adding at the end of it, in parentheses, the name of the original
273 author or publisher of that section if known, or else a unique number.
274 Make the same adjustment to the section titles in the list of
275 Invariant Sections in the license notice of the combined work.</P>
276
277 <P>In the combination, you must combine any sections entitled "History"
278 in the various original documents, forming one section entitled
279 "History"; likewise combine any sections entitled "Acknowledgements",
280 and any sections entitled "Dedications". You must delete all sections
281 entitled "Endorsements."</P>
282
283 <H2>6. Collections Of Documents</H2>
284
285 <P>You may make a collection consisting of the Document and other documents
286 released under this License, and replace the individual copies of this
287 License in the various documents with a single copy that is included in
288 the collection, provided that you follow the rules of this License for
289 verbatim copying of each of the documents in all other respects.</P>
290
291 <P>You may extract a single document from such a collection, and distribute
292 it individually under this License, provided you insert a copy of this
293 License into the extracted document, and follow this License in all
294 other respects regarding verbatim copying of that document.</P>
295
296 <H2>7. Aggregation With Independent Works</H2>
297
298 <P>A compilation of the Document or its derivatives with other separate
299 and independent documents or works, in or on a volume of a storage or
300 distribution medium, does not as a whole count as a Modified Version
301 of the Document, provided no compilation copyright is claimed for the
302 compilation. Such a compilation is called an "aggregate", and this
303 License does not apply to the other self-contained works thus compiled
304 with the Document, on account of their being thus compiled, if they
305 are not themselves derivative works of the Document.</P>
306
307 <P>If the Cover Text requirement of section 3 is applicable to these
308 copies of the Document, then if the Document is less than one quarter
309 of the entire aggregate, the Document's Cover Texts may be placed on
310 covers that surround only the Document within the aggregate.
311 Otherwise they must appear on covers around the whole aggregate.</P>
312
313 <H2>8. Translation</H2>
314
315 <P>Translation is considered a kind of modification, so you may
316 distribute translations of the Document under the terms of section 4.
317 Replacing Invariant Sections with translations requires special
318 permission from their copyright holders, but you may include
319 translations of some or all Invariant Sections in addition to the
320 original versions of these Invariant Sections. You may include a
321 translation of this License provided that you also include the
322 original English version of this License. In case of a disagreement
323 between the translation and the original English version of this
324 License, the original English version will prevail.</P>
325
326 <H2>9. Termination</H2>
327
328 <P>You may not copy, modify, sublicense, or distribute the Document except
329 as expressly provided for under this License. Any other attempt to
330 copy, modify, sublicense or distribute the Document is void, and will
331 automatically terminate your rights under this License. However,
332 parties who have received copies, or rights, from you under this
333 License will not have their licenses terminated so long as such
334 parties remain in full compliance.</P>
335
336 <H2>10. Future Revisions Of This License</H2>
337
338 <P>The Free Software Foundation may publish new, revised versions
339 of the GNU Free Documentation License from time to time. Such new
340 versions will be similar in spirit to the present version, but may
341 differ in detail to address new problems or concerns. See
342 <A HREF="http:///www.gnu.org/copyleft/">http:///www.gnu.org/copyleft/</A>.</P>
343
344 <P>Each version of the License is given a distinguishing version number.
345 If the Document specifies that a particular numbered version of this
346 License "or any later version" applies to it, you have the option of
347 following the terms and conditions either of that specified version or
348 of any later version that has been published (not as a draft) by the
349 Free Software Foundation. If the Document does not specify a version
350 number of this License, you may choose any version ever published (not
351 as a draft) by the Free Software Foundation.</P>
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