| 1 | @c -*-texinfo-*- | 
|---|
| 2 | @node GNU Free Documentation License, , , Copying This Manual | 
|---|
| 3 |  | 
|---|
| 4 | @appendix GNU Free Documentation License | 
|---|
| 5 | @center Version 1.1, March 2000 | 
|---|
| 6 |  | 
|---|
| 7 | @display | 
|---|
| 8 | Copyright (C) 2000  Free Software Foundation, Inc. | 
|---|
| 9 | 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA | 
|---|
| 10 |  | 
|---|
| 11 | Everyone is permitted to copy and distribute verbatim copies | 
|---|
| 12 | of this license document, but changing it is not allowed. | 
|---|
| 13 | @end display | 
|---|
| 14 | @sp 1 | 
|---|
| 15 | @enumerate 0 | 
|---|
| 16 | @item | 
|---|
| 17 | PREAMBLE | 
|---|
| 18 |  | 
|---|
| 19 | The purpose of this License is to make a manual, textbook, or other | 
|---|
| 20 | written document ``free'' in the sense of freedom: to assure everyone | 
|---|
| 21 | the effective freedom to copy and redistribute it, with or without | 
|---|
| 22 | modifying it, either commercially or noncommercially.  Secondarily, | 
|---|
| 23 | this License preserves for the author and publisher a way to get | 
|---|
| 24 | credit for their work, while not being considered responsible for | 
|---|
| 25 | modifications made by others. | 
|---|
| 26 |  | 
|---|
| 27 | This License is a kind of ``copyleft'', which means that derivative | 
|---|
| 28 | works of the document must themselves be free in the same sense.  It | 
|---|
| 29 | complements the GNU General Public License, which is a copyleft | 
|---|
| 30 | license designed for free software. | 
|---|
| 31 |  | 
|---|
| 32 | We have designed this License in order to use it for manuals for free | 
|---|
| 33 | software, because free software needs free documentation: a free | 
|---|
| 34 | program should come with manuals providing the same freedoms that the | 
|---|
| 35 | software does.  But this License is not limited to software manuals; | 
|---|
| 36 | it can be used for any textual work, regardless of subject matter or | 
|---|
| 37 | whether it is published as a printed book.  We recommend this License | 
|---|
| 38 | principally for works whose purpose is instruction or reference. | 
|---|
| 39 |  | 
|---|
| 40 | @sp 1 | 
|---|
| 41 | @item | 
|---|
| 42 | APPLICABILITY AND DEFINITIONS | 
|---|
| 43 |  | 
|---|
| 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 | 
|---|
| 48 | addressed as ``you.'' | 
|---|
| 49 |  | 
|---|
| 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. | 
|---|
| 53 |  | 
|---|
| 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 | 
|---|
| 63 | them. | 
|---|
| 64 |  | 
|---|
| 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. | 
|---|
| 68 |  | 
|---|
| 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. | 
|---|
| 72 |  | 
|---|
| 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.'' | 
|---|
| 84 |  | 
|---|
| 85 | Examples of suitable formats for Transparent copies include plain | 
|---|
| 86 | ASCII without markup, Texinfo input format, LaTeX input format, SGML | 
|---|
| 87 | or XML using a publicly available DTD, and standard-conforming simple | 
|---|
| 88 | HTML designed for human modification.  Opaque formats include | 
|---|
| 89 | PostScript, PDF, proprietary formats that can be read and edited only | 
|---|
| 90 | by proprietary word processors, SGML or XML for which the DTD and/or | 
|---|
| 91 | processing tools are not generally available, and the | 
|---|
| 92 | machine-generated HTML produced by some word processors for output | 
|---|
| 93 | purposes only. | 
|---|
| 94 |  | 
|---|
| 95 | The ``Title Page'' means, for a printed book, the title page itself, | 
|---|
| 96 | plus such following pages as are needed to hold, legibly, the material | 
|---|
| 97 | this License requires to appear in the title page.  For works in | 
|---|
| 98 | formats which do not have any title page as such, ``Title Page'' means | 
|---|
| 99 | the text near the most prominent appearance of the work's title, | 
|---|
| 100 | preceding the beginning of the body of the text. | 
|---|
| 101 | @sp 1 | 
|---|
| 102 | @item | 
|---|
| 103 | VERBATIM COPYING | 
|---|
| 104 |  | 
|---|
| 105 | You may copy and distribute the Document in any medium, either | 
|---|
| 106 | commercially or noncommercially, provided that this License, the | 
|---|
| 107 | copyright notices, and the license notice saying this License applies | 
|---|
| 108 | to the Document are reproduced in all copies, and that you add no other | 
|---|
| 109 | conditions whatsoever to those of this License.  You may not use | 
|---|
| 110 | technical measures to obstruct or control the reading or further | 
|---|
| 111 | copying of the copies you make or distribute.  However, you may accept | 
|---|
| 112 | compensation in exchange for copies.  If you distribute a large enough | 
|---|
| 113 | number of copies you must also follow the conditions in section 3. | 
|---|
| 114 |  | 
|---|
| 115 | You may also lend copies, under the same conditions stated above, and | 
|---|
| 116 | you may publicly display copies. | 
|---|
| 117 | @sp 1 | 
|---|
| 118 | @item | 
|---|
| 119 | COPYING IN QUANTITY | 
|---|
| 120 |  | 
|---|
| 121 | If you publish printed copies of the Document numbering more than 100, | 
|---|
| 122 | and the Document's license notice requires Cover Texts, you must enclose | 
|---|
| 123 | the copies in covers that carry, clearly and legibly, all these Cover | 
|---|
| 124 | Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on | 
|---|
| 125 | the back cover.  Both covers must also clearly and legibly identify | 
|---|
| 126 | you as the publisher of these copies.  The front cover must present | 
|---|
| 127 | the full title with all words of the title equally prominent and | 
|---|
| 128 | visible.  You may add other material on the covers in addition. | 
|---|
| 129 | Copying with changes limited to the covers, as long as they preserve | 
|---|
| 130 | the title of the Document and satisfy these conditions, can be treated | 
|---|
| 131 | as verbatim copying in other respects. | 
|---|
| 132 |  | 
|---|
| 133 | If the required texts for either cover are too voluminous to fit | 
|---|
| 134 | legibly, you should put the first ones listed (as many as fit | 
|---|
| 135 | reasonably) on the actual cover, and continue the rest onto adjacent | 
|---|
| 136 | pages. | 
|---|
| 137 |  | 
|---|
| 138 | If you publish or distribute Opaque copies of the Document numbering | 
|---|
| 139 | more than 100, you must either include a machine-readable Transparent | 
|---|
| 140 | copy along with each Opaque copy, or state in or with each Opaque copy | 
|---|
| 141 | a publicly-accessible computer-network location containing a complete | 
|---|
| 142 | Transparent copy of the Document, free of added material, which the | 
|---|
| 143 | general network-using public has access to download anonymously at no | 
|---|
| 144 | charge using public-standard network protocols.  If you use the latter | 
|---|
| 145 | option, you must take reasonably prudent steps, when you begin | 
|---|
| 146 | distribution of Opaque copies in quantity, to ensure that this | 
|---|
| 147 | Transparent copy will remain thus accessible at the stated location | 
|---|
| 148 | until at least one year after the last time you distribute an Opaque | 
|---|
| 149 | copy (directly or through your agents or retailers) of that edition to | 
|---|
| 150 | the public. | 
|---|
| 151 |  | 
|---|
| 152 | It is requested, but not required, that you contact the authors of the | 
|---|
| 153 | Document well before redistributing any large number of copies, to give | 
|---|
| 154 | them a chance to provide you with an updated version of the Document. | 
|---|
| 155 | @sp 1 | 
|---|
| 156 | @item | 
|---|
| 157 | MODIFICATIONS | 
|---|
| 158 |  | 
|---|
| 159 | You may copy and distribute a Modified Version of the Document under | 
|---|
| 160 | the conditions of sections 2 and 3 above, provided that you release | 
|---|
| 161 | the Modified Version under precisely this License, with the Modified | 
|---|
| 162 | Version filling the role of the Document, thus licensing distribution | 
|---|
| 163 | and modification of the Modified Version to whoever possesses a copy | 
|---|
| 164 | of it.  In addition, you must do these things in the Modified Version: | 
|---|
| 165 |  | 
|---|
| 166 | A. Use in the Title Page (and on the covers, if any) a title distinct | 
|---|
| 167 | from that of the Document, and from those of previous versions | 
|---|
| 168 | (which should, if there were any, be listed in the History section | 
|---|
| 169 | of the Document).  You may use the same title as a previous version | 
|---|
| 170 | if the original publisher of that version gives permission.@* | 
|---|
| 171 | B. List on the Title Page, as authors, one or more persons or entities | 
|---|
| 172 | responsible for authorship of the modifications in the Modified | 
|---|
| 173 | Version, together with at least five of the principal authors of the | 
|---|
| 174 | Document (all of its principal authors, if it has less than five).@* | 
|---|
| 175 | C. State on the Title page the name of the publisher of the | 
|---|
| 176 | Modified Version, as the publisher.@* | 
|---|
| 177 | D. Preserve all the copyright notices of the Document.@* | 
|---|
| 178 | E. Add an appropriate copyright notice for your modifications | 
|---|
| 179 | adjacent to the other copyright notices.@* | 
|---|
| 180 | F. Include, immediately after the copyright notices, a license notice | 
|---|
| 181 | giving the public permission to use the Modified Version under the | 
|---|
| 182 | terms of this License, in the form shown in the Addendum below.@* | 
|---|
| 183 | G. Preserve in that license notice the full lists of Invariant Sections | 
|---|
| 184 | and required Cover Texts given in the Document's license notice.@* | 
|---|
| 185 | H. Include an unaltered copy of this License.@* | 
|---|
| 186 | I. Preserve the section entitled ``History'', and its title, and add to | 
|---|
| 187 | it an item stating at least the title, year, new authors, and | 
|---|
| 188 | publisher of the Modified Version as given on the Title Page.  If | 
|---|
| 189 | there is no section entitled ``History'' in the Document, create one | 
|---|
| 190 | stating the title, year, authors, and publisher of the Document as | 
|---|
| 191 | given on its Title Page, then add an item describing the Modified | 
|---|
| 192 | Version as stated in the previous sentence.@* | 
|---|
| 193 | J. Preserve the network location, if any, given in the Document for | 
|---|
| 194 | public access to a Transparent copy of the Document, and likewise | 
|---|
| 195 | the network locations given in the Document for previous versions | 
|---|
| 196 | it was based on.  These may be placed in the ``History'' section. | 
|---|
| 197 | You may omit a network location for a work that was published at | 
|---|
| 198 | least four years before the Document itself, or if the original | 
|---|
| 199 | publisher of the version it refers to gives permission.@* | 
|---|
| 200 | K. In any section entitled ``Acknowledgements'' or ``Dedications'', | 
|---|
| 201 | preserve the section's title, and preserve in the section all the | 
|---|
| 202 | substance and tone of each of the contributor acknowledgements | 
|---|
| 203 | and/or dedications given therein.@* | 
|---|
| 204 | L. Preserve all the Invariant Sections of the Document, | 
|---|
| 205 | unaltered in their text and in their titles.  Section numbers | 
|---|
| 206 | or the equivalent are not considered part of the section titles.@* | 
|---|
| 207 | M. Delete any section entitled ``Endorsements.''  Such a section | 
|---|
| 208 | may not be included in the Modified Version.@* | 
|---|
| 209 | N. Do not retitle any existing section as ``Endorsements'' | 
|---|
| 210 | or to conflict in title with any Invariant Section.@* | 
|---|
| 211 | @sp 1 | 
|---|
| 212 | If the Modified Version includes new front-matter sections or | 
|---|
| 213 | appendices that qualify as Secondary Sections and contain no material | 
|---|
| 214 | copied from the Document, you may at your option designate some or all | 
|---|
| 215 | of these sections as invariant.  To do this, add their titles to the | 
|---|
| 216 | list of Invariant Sections in the Modified Version's license notice. | 
|---|
| 217 | These titles must be distinct from any other section titles. | 
|---|
| 218 |  | 
|---|
| 219 | You may add a section entitled ``Endorsements'', provided it contains | 
|---|
| 220 | nothing but endorsements of your Modified Version by various | 
|---|
| 221 | parties--for example, statements of peer review or that the text has | 
|---|
| 222 | been approved by an organization as the authoritative definition of a | 
|---|
| 223 | standard. | 
|---|
| 224 |  | 
|---|
| 225 | You may add a passage of up to five words as a Front-Cover Text, and a | 
|---|
| 226 | passage of up to 25 words as a Back-Cover Text, to the end of the list | 
|---|
| 227 | of Cover Texts in the Modified Version.  Only one passage of | 
|---|
| 228 | Front-Cover Text and one of Back-Cover Text may be added by (or | 
|---|
| 229 | through arrangements made by) any one entity.  If the Document already | 
|---|
| 230 | includes a cover text for the same cover, previously added by you or | 
|---|
| 231 | by arrangement made by the same entity you are acting on behalf of, | 
|---|
| 232 | you may not add another; but you may replace the old one, on explicit | 
|---|
| 233 | permission from the previous publisher that added the old one. | 
|---|
| 234 |  | 
|---|
| 235 | The author(s) and publisher(s) of the Document do not by this License | 
|---|
| 236 | give permission to use their names for publicity for or to assert or | 
|---|
| 237 | imply endorsement of any Modified Version. | 
|---|
| 238 | @sp 1 | 
|---|
| 239 | @item | 
|---|
| 240 | COMBINING DOCUMENTS | 
|---|
| 241 |  | 
|---|
| 242 | You may combine the Document with other documents released under this | 
|---|
| 243 | License, under the terms defined in section 4 above for modified | 
|---|
| 244 | versions, provided that you include in the combination all of the | 
|---|
| 245 | Invariant Sections of all of the original documents, unmodified, and | 
|---|
| 246 | list them all as Invariant Sections of your combined work in its | 
|---|
| 247 | license notice. | 
|---|
| 248 |  | 
|---|
| 249 | The combined work need only contain one copy of this License, and | 
|---|
| 250 | multiple identical Invariant Sections may be replaced with a single | 
|---|
| 251 | copy.  If there are multiple Invariant Sections with the same name but | 
|---|
| 252 | different contents, make the title of each such section unique by | 
|---|
| 253 | adding at the end of it, in parentheses, the name of the original | 
|---|
| 254 | author or publisher of that section if known, or else a unique number. | 
|---|
| 255 | Make the same adjustment to the section titles in the list of | 
|---|
| 256 | Invariant Sections in the license notice of the combined work. | 
|---|
| 257 |  | 
|---|
| 258 | In the combination, you must combine any sections entitled ``History'' | 
|---|
| 259 | in the various original documents, forming one section entitled | 
|---|
| 260 | ``History''; likewise combine any sections entitled ``Acknowledgements'', | 
|---|
| 261 | and any sections entitled ``Dedications.''  You must delete all sections | 
|---|
| 262 | entitled ``Endorsements.'' | 
|---|
| 263 | @sp 1 | 
|---|
| 264 | @item | 
|---|
| 265 | COLLECTIONS OF DOCUMENTS | 
|---|
| 266 |  | 
|---|
| 267 | You may make a collection consisting of the Document and other documents | 
|---|
| 268 | released under this License, and replace the individual copies of this | 
|---|
| 269 | License in the various documents with a single copy that is included in | 
|---|
| 270 | the collection, provided that you follow the rules of this License for | 
|---|
| 271 | verbatim copying of each of the documents in all other respects. | 
|---|
| 272 |  | 
|---|
| 273 | You may extract a single document from such a collection, and distribute | 
|---|
| 274 | it individually under this License, provided you insert a copy of this | 
|---|
| 275 | License into the extracted document, and follow this License in all | 
|---|
| 276 | other respects regarding verbatim copying of that document. | 
|---|
| 277 | @sp 1 | 
|---|
| 278 | @item | 
|---|
| 279 | AGGREGATION WITH INDEPENDENT WORKS | 
|---|
| 280 |  | 
|---|
| 281 | A compilation of the Document or its derivatives with other separate | 
|---|
| 282 | and independent documents or works, in or on a volume of a storage or | 
|---|
| 283 | distribution medium, does not as a whole count as a Modified Version | 
|---|
| 284 | of the Document, provided no compilation copyright is claimed for the | 
|---|
| 285 | compilation.  Such a compilation is called an ``aggregate'', and this | 
|---|
| 286 | License does not apply to the other self-contained works thus compiled | 
|---|
| 287 | with the Document, on account of their being thus compiled, if they | 
|---|
| 288 | are not themselves derivative works of the Document. | 
|---|
| 289 |  | 
|---|
| 290 | If the Cover Text requirement of section 3 is applicable to these | 
|---|
| 291 | copies of the Document, then if the Document is less than one quarter | 
|---|
| 292 | of the entire aggregate, the Document's Cover Texts may be placed on | 
|---|
| 293 | covers that surround only the Document within the aggregate. | 
|---|
| 294 | Otherwise they must appear on covers around the whole aggregate. | 
|---|
| 295 | @sp 1 | 
|---|
| 296 | @item | 
|---|
| 297 | TRANSLATION | 
|---|
| 298 |  | 
|---|
| 299 | Translation is considered a kind of modification, so you may | 
|---|
| 300 | distribute translations of the Document under the terms of section 4. | 
|---|
| 301 | Replacing Invariant Sections with translations requires special | 
|---|
| 302 | permission from their copyright holders, but you may include | 
|---|
| 303 | translations of some or all Invariant Sections in addition to the | 
|---|
| 304 | original versions of these Invariant Sections.  You may include a | 
|---|
| 305 | translation of this License provided that you also include the | 
|---|
| 306 | original English version of this License.  In case of a disagreement | 
|---|
| 307 | between the translation and the original English version of this | 
|---|
| 308 | License, the original English version will prevail. | 
|---|
| 309 | @sp 1 | 
|---|
| 310 | @item | 
|---|
| 311 | TERMINATION | 
|---|
| 312 |  | 
|---|
| 313 | You may not copy, modify, sublicense, or distribute the Document except | 
|---|
| 314 | as expressly provided for under this License.  Any other attempt to | 
|---|
| 315 | copy, modify, sublicense or distribute the Document is void, and will | 
|---|
| 316 | automatically terminate your rights under this License.  However, | 
|---|
| 317 | parties who have received copies, or rights, from you under this | 
|---|
| 318 | License will not have their licenses terminated so long as such | 
|---|
| 319 | parties remain in full compliance. | 
|---|
| 320 | @sp 1 | 
|---|
| 321 | @item | 
|---|
| 322 | FUTURE REVISIONS OF THIS LICENSE | 
|---|
| 323 |  | 
|---|
| 324 | The Free Software Foundation may publish new, revised versions | 
|---|
| 325 | of the GNU Free Documentation License from time to time.  Such new | 
|---|
| 326 | versions will be similar in spirit to the present version, but may | 
|---|
| 327 | differ in detail to address new problems or concerns.  See | 
|---|
| 328 | http://www.gnu.org/copyleft/. | 
|---|
| 329 |  | 
|---|
| 330 | Each version of the License is given a distinguishing version number. | 
|---|
| 331 | If the Document specifies that a particular numbered version of this | 
|---|
| 332 | License ``or any later version'' applies to it, you have the option of | 
|---|
| 333 | following the terms and conditions either of that specified version or | 
|---|
| 334 | of any later version that has been published (not as a draft) by the | 
|---|
| 335 | Free Software Foundation.  If the Document does not specify a version | 
|---|
| 336 | number of this License, you may choose any version ever published (not | 
|---|
| 337 | as a draft) by the Free Software Foundation. | 
|---|
| 338 |  | 
|---|
| 339 | @end enumerate | 
|---|
| 340 |  | 
|---|
| 341 | @unnumberedsec ADDENDUM: How to use this License for your documents | 
|---|
| 342 |  | 
|---|
| 343 | To use this License in a document you have written, include a copy of | 
|---|
| 344 | the License in the document and put the following copyright and | 
|---|
| 345 | license notices just after the title page: | 
|---|
| 346 |  | 
|---|
| 347 | @smallexample | 
|---|
| 348 | @group | 
|---|
| 349 | Copyright (C)  @var{year}  @var{your name}. | 
|---|
| 350 | Permission is granted to copy, distribute and/or modify this document | 
|---|
| 351 | under the terms of the GNU Free Documentation License, Version 1.1 | 
|---|
| 352 | or any later version published by the Free Software Foundation; | 
|---|
| 353 | with the Invariant Sections being @var{list their titles}, with the | 
|---|
| 354 | Front-Cover Texts being @var{list}, and with the Back-Cover Texts being @var{list}. | 
|---|
| 355 | A copy of the license is included in the section entitled "GNU | 
|---|
| 356 | Free Documentation License." | 
|---|
| 357 | @end group | 
|---|
| 358 | @end smallexample | 
|---|
| 359 |  | 
|---|
| 360 | If you have no Invariant Sections, write ``with no Invariant Sections'' | 
|---|
| 361 | instead of saying which ones are invariant.  If you have no | 
|---|
| 362 | Front-Cover Texts, write ``no Front-Cover Texts'' instead of | 
|---|
| 363 | ``Front-Cover Texts being @var{list}''; likewise for Back-Cover Texts. | 
|---|
| 364 |  | 
|---|
| 365 | If your document contains nontrivial examples of program code, we | 
|---|
| 366 | recommend releasing these examples in parallel under your choice of | 
|---|
| 367 | free software license, such as the GNU General Public License, | 
|---|
| 368 | to permit their use in free software. | 
|---|