| 1 | The program GNU Go is distributed under the terms of the |
| 2 | GNU General Public License (GPL). Its documentation is |
| 3 | distributed under the terms of the GNU Free Documentation |
| 4 | License (GFDL). |
| 5 | |
| 6 | @menu |
| 7 | * GPL:: The GNU General Public License |
| 8 | * GFDL:: The GNU Free Documentation License |
| 9 | * GTP License:: The Go Text Protocol License |
| 10 | @end menu |
| 11 | |
| 12 | @node GPL, GFDL, Copying, Copying |
| 13 | @cindex licence, program (GPL) |
| 14 | |
| 15 | @section GNU GENERAL PUBLIC LICENSE |
| 16 | @center Version 3, 29 June 2007 |
| 17 | |
| 18 | @display |
| 19 | Copyright @copyright{} 2007 Free Software Foundation, Inc. <http://fsf.org/> |
| 20 | Everyone is permitted to copy and distribute verbatim copies |
| 21 | of this license document, but changing it is not allowed. |
| 22 | @end display |
| 23 | |
| 24 | @unnumberedsec Preamble |
| 25 | |
| 26 | The GNU General Public License is a free, copyleft license for |
| 27 | software and other kinds of works. |
| 28 | |
| 29 | The licenses for most software and other practical works are designed |
| 30 | to take away your freedom to share and change the works. By contrast, |
| 31 | the GNU General Public License is intended to guarantee your freedom to |
| 32 | share and change all versions of a program--to make sure it remains free |
| 33 | software for all its users. We, the Free Software Foundation, use the |
| 34 | GNU General Public License for most of our software; it applies also to |
| 35 | any other work released this way by its authors. You can apply it to |
| 36 | your programs, too. |
| 37 | |
| 38 | When we speak of free software, we are referring to freedom, not |
| 39 | price. Our General Public Licenses are designed to make sure that you |
| 40 | have the freedom to distribute copies of free software (and charge for |
| 41 | them if you wish), that you receive source code or can get it if you |
| 42 | want it, that you can change the software or use pieces of it in new |
| 43 | free programs, and that you know you can do these things. |
| 44 | |
| 45 | To protect your rights, we need to prevent others from denying you |
| 46 | these rights or asking you to surrender the rights. Therefore, you have |
| 47 | certain responsibilities if you distribute copies of the software, or if |
| 48 | you modify it: responsibilities to respect the freedom of others. |
| 49 | |
| 50 | For example, if you distribute copies of such a program, whether |
| 51 | gratis or for a fee, you must pass on to the recipients the same |
| 52 | freedoms that you received. You must make sure that they, too, receive |
| 53 | or can get the source code. And you must show them these terms so they |
| 54 | know their rights. |
| 55 | |
| 56 | Developers that use the GNU GPL protect your rights with two steps: |
| 57 | (1) assert copyright on the software, and (2) offer you this License |
| 58 | giving you legal permission to copy, distribute and/or modify it. |
| 59 | |
| 60 | For the developers' and authors' protection, the GPL clearly explains |
| 61 | that there is no warranty for this free software. For both users' and |
| 62 | authors' sake, the GPL requires that modified versions be marked as |
| 63 | changed, so that their problems will not be attributed erroneously to |
| 64 | authors of previous versions. |
| 65 | |
| 66 | Some devices are designed to deny users access to install or run |
| 67 | modified versions of the software inside them, although the manufacturer |
| 68 | can do so. This is fundamentally incompatible with the aim of |
| 69 | protecting users' freedom to change the software. The systematic |
| 70 | pattern of such abuse occurs in the area of products for individuals to |
| 71 | use, which is precisely where it is most unacceptable. Therefore, we |
| 72 | have designed this version of the GPL to prohibit the practice for those |
| 73 | products. If such problems arise substantially in other domains, we |
| 74 | stand ready to extend this provision to those domains in future versions |
| 75 | of the GPL, as needed to protect the freedom of users. |
| 76 | |
| 77 | Finally, every program is threatened constantly by software patents. |
| 78 | States should not allow patents to restrict development and use of |
| 79 | software on general-purpose computers, but in those that do, we wish to |
| 80 | avoid the special danger that patents applied to a free program could |
| 81 | make it effectively proprietary. To prevent this, the GPL assures that |
| 82 | patents cannot be used to render the program non-free. |
| 83 | |
| 84 | The precise terms and conditions for copying, distribution and |
| 85 | modification follow. |
| 86 | |
| 87 | @iftex |
| 88 | @unnumberedsec TERMS AND CONDITIONS |
| 89 | @end iftex |
| 90 | @ifinfo |
| 91 | @center TERMS AND CONDITIONS |
| 92 | @end ifinfo |
| 93 | |
| 94 | @enumerate 0 |
| 95 | @item |
| 96 | DEFINITIONS |
| 97 | |
| 98 | "This License" refers to version 3 of the GNU General Public License. |
| 99 | |
| 100 | "Copyright" also means copyright-like laws that apply to other kinds of |
| 101 | works, such as semiconductor masks. |
| 102 | |
| 103 | "The Program" refers to any copyrightable work licensed under this |
| 104 | License. Each licensee is addressed as "you". "Licensees" and |
| 105 | "recipients" may be individuals or organizations. |
| 106 | |
| 107 | To "modify" a work means to copy from or adapt all or part of the work |
| 108 | in a fashion requiring copyright permission, other than the making of an |
| 109 | exact copy. The resulting work is called a "modified version" of the |
| 110 | earlier work or a work "based on" the earlier work. |
| 111 | |
| 112 | A "covered work" means either the unmodified Program or a work based |
| 113 | on the Program. |
| 114 | |
| 115 | To "propagate" a work means to do anything with it that, without |
| 116 | permission, would make you directly or secondarily liable for |
| 117 | infringement under applicable copyright law, except executing it on a |
| 118 | computer or modifying a private copy. Propagation includes copying, |
| 119 | distribution (with or without modification), making available to the |
| 120 | public, and in some countries other activities as well. |
| 121 | |
| 122 | To "convey" a work means any kind of propagation that enables other |
| 123 | parties to make or receive copies. Mere interaction with a user through |
| 124 | a computer network, with no transfer of a copy, is not conveying. |
| 125 | |
| 126 | An interactive user interface displays "Appropriate Legal Notices" |
| 127 | to the extent that it includes a convenient and prominently visible |
| 128 | feature that (1) displays an appropriate copyright notice, and (2) |
| 129 | tells the user that there is no warranty for the work (except to the |
| 130 | extent that warranties are provided), that licensees may convey the |
| 131 | work under this License, and how to view a copy of this License. If |
| 132 | the interface presents a list of user commands or options, such as a |
| 133 | menu, a prominent item in the list meets this criterion. |
| 134 | |
| 135 | @sp 1 |
| 136 | @item |
| 137 | SOURCE CODE |
| 138 | |
| 139 | The "source code" for a work means the preferred form of the work |
| 140 | for making modifications to it. "Object code" means any non-source |
| 141 | form of a work. |
| 142 | |
| 143 | A "Standard Interface" means an interface that either is an official |
| 144 | standard defined by a recognized standards body, or, in the case of |
| 145 | interfaces specified for a particular programming language, one that |
| 146 | is widely used among developers working in that language. |
| 147 | |
| 148 | The "System Libraries" of an executable work include anything, other |
| 149 | than the work as a whole, that (a) is included in the normal form of |
| 150 | packaging a Major Component, but which is not part of that Major |
| 151 | Component, and (b) serves only to enable use of the work with that |
| 152 | Major Component, or to implement a Standard Interface for which an |
| 153 | implementation is available to the public in source code form. A |
| 154 | "Major Component", in this context, means a major essential component |
| 155 | (kernel, window system, and so on) of the specific operating system |
| 156 | (if any) on which the executable work runs, or a compiler used to |
| 157 | produce the work, or an object code interpreter used to run it. |
| 158 | |
| 159 | The "Corresponding Source" for a work in object code form means all |
| 160 | the source code needed to generate, install, and (for an executable |
| 161 | work) run the object code and to modify the work, including scripts to |
| 162 | control those activities. However, it does not include the work's |
| 163 | System Libraries, or general-purpose tools or generally available free |
| 164 | programs which are used unmodified in performing those activities but |
| 165 | which are not part of the work. For example, Corresponding Source |
| 166 | includes interface definition files associated with source files for |
| 167 | the work, and the source code for shared libraries and dynamically |
| 168 | linked subprograms that the work is specifically designed to require, |
| 169 | such as by intimate data communication or control flow between those |
| 170 | subprograms and other parts of the work. |
| 171 | |
| 172 | The Corresponding Source need not include anything that users |
| 173 | can regenerate automatically from other parts of the Corresponding |
| 174 | Source. |
| 175 | |
| 176 | The Corresponding Source for a work in source code form is that |
| 177 | same work. |
| 178 | |
| 179 | @sp 1 |
| 180 | @item |
| 181 | BASIC PERMISSIONS |
| 182 | |
| 183 | All rights granted under this License are granted for the term of |
| 184 | copyright on the Program, and are irrevocable provided the stated |
| 185 | conditions are met. This License explicitly affirms your unlimited |
| 186 | permission to run the unmodified Program. The output from running a |
| 187 | covered work is covered by this License only if the output, given its |
| 188 | content, constitutes a covered work. This License acknowledges your |
| 189 | rights of fair use or other equivalent, as provided by copyright law. |
| 190 | |
| 191 | You may make, run and propagate covered works that you do not |
| 192 | convey, without conditions so long as your license otherwise remains |
| 193 | in force. You may convey covered works to others for the sole purpose |
| 194 | of having them make modifications exclusively for you, or provide you |
| 195 | with facilities for running those works, provided that you comply with |
| 196 | the terms of this License in conveying all material for which you do |
| 197 | not control copyright. Those thus making or running the covered works |
| 198 | for you must do so exclusively on your behalf, under your direction |
| 199 | and control, on terms that prohibit them from making any copies of |
| 200 | your copyrighted material outside their relationship with you. |
| 201 | |
| 202 | Conveying under any other circumstances is permitted solely under |
| 203 | the conditions stated below. Sublicensing is not allowed; section 10 |
| 204 | makes it unnecessary. |
| 205 | |
| 206 | @sp 1 |
| 207 | @item |
| 208 | PROTECTING USERS' LEGAL RIGHTS FROM ANTI-CIRCUMVENTION LAW |
| 209 | |
| 210 | No covered work shall be deemed part of an effective technological |
| 211 | measure under any applicable law fulfilling obligations under article |
| 212 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or |
| 213 | similar laws prohibiting or restricting circumvention of such |
| 214 | measures. |
| 215 | |
| 216 | When you convey a covered work, you waive any legal power to forbid |
| 217 | circumvention of technological measures to the extent such circumvention |
| 218 | is effected by exercising rights under this License with respect to |
| 219 | the covered work, and you disclaim any intention to limit operation or |
| 220 | modification of the work as a means of enforcing, against the work's |
| 221 | users, your or third parties' legal rights to forbid circumvention of |
| 222 | technological measures. |
| 223 | |
| 224 | @sp 1 |
| 225 | @item |
| 226 | CONVEYING VERBATIM COPIES |
| 227 | |
| 228 | You may convey verbatim copies of the Program's source code as you |
| 229 | receive it, in any medium, provided that you conspicuously and |
| 230 | appropriately publish on each copy an appropriate copyright notice; |
| 231 | keep intact all notices stating that this License and any |
| 232 | non-permissive terms added in accord with section 7 apply to the code; |
| 233 | keep intact all notices of the absence of any warranty; and give all |
| 234 | recipients a copy of this License along with the Program. |
| 235 | |
| 236 | You may charge any price or no price for each copy that you convey, |
| 237 | and you may offer support or warranty protection for a fee. |
| 238 | |
| 239 | @sp 1 |
| 240 | @item |
| 241 | CONVEYING MODIFIED SOURCE VERSIONS |
| 242 | |
| 243 | You may convey a work based on the Program, or the modifications to |
| 244 | produce it from the Program, in the form of source code under the |
| 245 | terms of section 4, provided that you also meet all of these conditions: |
| 246 | |
| 247 | a) The work must carry prominent notices stating that you modified |
| 248 | it, and giving a relevant date. |
| 249 | |
| 250 | b) The work must carry prominent notices stating that it is |
| 251 | released under this License and any conditions added under section |
| 252 | 7. This requirement modifies the requirement in section 4 to |
| 253 | "keep intact all notices". |
| 254 | |
| 255 | c) You must license the entire work, as a whole, under this |
| 256 | License to anyone who comes into possession of a copy. This |
| 257 | License will therefore apply, along with any applicable section 7 |
| 258 | additional terms, to the whole of the work, and all its parts, |
| 259 | regardless of how they are packaged. This License gives no |
| 260 | permission to license the work in any other way, but it does not |
| 261 | invalidate such permission if you have separately received it. |
| 262 | |
| 263 | d) If the work has interactive user interfaces, each must display |
| 264 | Appropriate Legal Notices; however, if the Program has interactive |
| 265 | interfaces that do not display Appropriate Legal Notices, your |
| 266 | work need not make them do so. |
| 267 | |
| 268 | A compilation of a covered work with other separate and independent |
| 269 | works, which are not by their nature extensions of the covered work, |
| 270 | and which are not combined with it such as to form a larger program, |
| 271 | in or on a volume of a storage or distribution medium, is called an |
| 272 | "aggregate" if the compilation and its resulting copyright are not |
| 273 | used to limit the access or legal rights of the compilation's users |
| 274 | beyond what the individual works permit. Inclusion of a covered work |
| 275 | in an aggregate does not cause this License to apply to the other |
| 276 | parts of the aggregate. |
| 277 | |
| 278 | @sp 1 |
| 279 | @item |
| 280 | CONVEYING NON-SOURCE FORMS |
| 281 | |
| 282 | You may convey a covered work in object code form under the terms |
| 283 | of sections 4 and 5, provided that you also convey the |
| 284 | machine-readable Corresponding Source under the terms of this License, |
| 285 | in one of these ways: |
| 286 | |
| 287 | a) Convey the object code in, or embodied in, a physical product |
| 288 | (including a physical distribution medium), accompanied by the |
| 289 | Corresponding Source fixed on a durable physical medium |
| 290 | customarily used for software interchange. |
| 291 | |
| 292 | b) Convey the object code in, or embodied in, a physical product |
| 293 | (including a physical distribution medium), accompanied by a |
| 294 | written offer, valid for at least three years and valid for as |
| 295 | long as you offer spare parts or customer support for that product |
| 296 | model, to give anyone who possesses the object code either (1) a |
| 297 | copy of the Corresponding Source for all the software in the |
| 298 | product that is covered by this License, on a durable physical |
| 299 | medium customarily used for software interchange, for a price no |
| 300 | more than your reasonable cost of physically performing this |
| 301 | conveying of source, or (2) access to copy the |
| 302 | Corresponding Source from a network server at no charge. |
| 303 | |
| 304 | c) Convey individual copies of the object code with a copy of the |
| 305 | written offer to provide the Corresponding Source. This |
| 306 | alternative is allowed only occasionally and noncommercially, and |
| 307 | only if you received the object code with such an offer, in accord |
| 308 | with subsection 6b. |
| 309 | |
| 310 | d) Convey the object code by offering access from a designated |
| 311 | place (gratis or for a charge), and offer equivalent access to the |
| 312 | Corresponding Source in the same way through the same place at no |
| 313 | further charge. You need not require recipients to copy the |
| 314 | Corresponding Source along with the object code. If the place to |
| 315 | copy the object code is a network server, the Corresponding Source |
| 316 | may be on a different server (operated by you or a third party) |
| 317 | that supports equivalent copying facilities, provided you maintain |
| 318 | clear directions next to the object code saying where to find the |
| 319 | Corresponding Source. Regardless of what server hosts the |
| 320 | Corresponding Source, you remain obligated to ensure that it is |
| 321 | available for as long as needed to satisfy these requirements. |
| 322 | |
| 323 | e) Convey the object code using peer-to-peer transmission, provided |
| 324 | you inform other peers where the object code and Corresponding |
| 325 | Source of the work are being offered to the general public at no |
| 326 | charge under subsection 6d. |
| 327 | |
| 328 | A separable portion of the object code, whose source code is excluded |
| 329 | from the Corresponding Source as a System Library, need not be |
| 330 | included in conveying the object code work. |
| 331 | |
| 332 | A "User Product" is either (1) a "consumer product", which means any |
| 333 | tangible personal property which is normally used for personal, family, |
| 334 | or household purposes, or (2) anything designed or sold for incorporation |
| 335 | into a dwelling. In determining whether a product is a consumer product, |
| 336 | doubtful cases shall be resolved in favor of coverage. For a particular |
| 337 | product received by a particular user, "normally used" refers to a |
| 338 | typical or common use of that class of product, regardless of the status |
| 339 | of the particular user or of the way in which the particular user |
| 340 | actually uses, or expects or is expected to use, the product. A product |
| 341 | is a consumer product regardless of whether the product has substantial |
| 342 | commercial, industrial or non-consumer uses, unless such uses represent |
| 343 | the only significant mode of use of the product. |
| 344 | |
| 345 | "Installation Information" for a User Product means any methods, |
| 346 | procedures, authorization keys, or other information required to install |
| 347 | and execute modified versions of a covered work in that User Product from |
| 348 | a modified version of its Corresponding Source. The information must |
| 349 | suffice to ensure that the continued functioning of the modified object |
| 350 | code is in no case prevented or interfered with solely because |
| 351 | modification has been made. |
| 352 | |
| 353 | If you convey an object code work under this section in, or with, or |
| 354 | specifically for use in, a User Product, and the conveying occurs as |
| 355 | part of a transaction in which the right of possession and use of the |
| 356 | User Product is transferred to the recipient in perpetuity or for a |
| 357 | fixed term (regardless of how the transaction is characterized), the |
| 358 | Corresponding Source conveyed under this section must be accompanied |
| 359 | by the Installation Information. But this requirement does not apply |
| 360 | if neither you nor any third party retains the ability to install |
| 361 | modified object code on the User Product (for example, the work has |
| 362 | been installed in ROM). |
| 363 | |
| 364 | The requirement to provide Installation Information does not include a |
| 365 | requirement to continue to provide support service, warranty, or updates |
| 366 | for a work that has been modified or installed by the recipient, or for |
| 367 | the User Product in which it has been modified or installed. Access to a |
| 368 | network may be denied when the modification itself materially and |
| 369 | adversely affects the operation of the network or violates the rules and |
| 370 | protocols for communication across the network. |
| 371 | |
| 372 | Corresponding Source conveyed, and Installation Information provided, |
| 373 | in accord with this section must be in a format that is publicly |
| 374 | documented (and with an implementation available to the public in |
| 375 | source code form), and must require no special password or key for |
| 376 | unpacking, reading or copying. |
| 377 | |
| 378 | @sp 1 |
| 379 | @item |
| 380 | ADDITIONAL TERMS |
| 381 | |
| 382 | "Additional permissions" are terms that supplement the terms of this |
| 383 | License by making exceptions from one or more of its conditions. |
| 384 | Additional permissions that are applicable to the entire Program shall |
| 385 | be treated as though they were included in this License, to the extent |
| 386 | that they are valid under applicable law. If additional permissions |
| 387 | apply only to part of the Program, that part may be used separately |
| 388 | under those permissions, but the entire Program remains governed by |
| 389 | this License without regard to the additional permissions. |
| 390 | |
| 391 | When you convey a copy of a covered work, you may at your option |
| 392 | remove any additional permissions from that copy, or from any part of |
| 393 | it. (Additional permissions may be written to require their own |
| 394 | removal in certain cases when you modify the work.) You may place |
| 395 | additional permissions on material, added by you to a covered work, |
| 396 | for which you have or can give appropriate copyright permission. |
| 397 | |
| 398 | Notwithstanding any other provision of this License, for material you |
| 399 | add to a covered work, you may (if authorized by the copyright holders of |
| 400 | that material) supplement the terms of this License with terms: |
| 401 | |
| 402 | a) Disclaiming warranty or limiting liability differently from the |
| 403 | terms of sections 15 and 16 of this License; or |
| 404 | |
| 405 | b) Requiring preservation of specified reasonable legal notices or |
| 406 | author attributions in that material or in the Appropriate Legal |
| 407 | Notices displayed by works containing it; or |
| 408 | |
| 409 | c) Prohibiting misrepresentation of the origin of that material, or |
| 410 | requiring that modified versions of such material be marked in |
| 411 | reasonable ways as different from the original version; or |
| 412 | |
| 413 | d) Limiting the use for publicity purposes of names of licensors or |
| 414 | authors of the material; or |
| 415 | |
| 416 | e) Declining to grant rights under trademark law for use of some |
| 417 | trade names, trademarks, or service marks; or |
| 418 | |
| 419 | f) Requiring indemnification of licensors and authors of that |
| 420 | material by anyone who conveys the material (or modified versions of |
| 421 | it) with contractual assumptions of liability to the recipient, for |
| 422 | any liability that these contractual assumptions directly impose on |
| 423 | those licensors and authors. |
| 424 | |
| 425 | All other non-permissive additional terms are considered "further |
| 426 | restrictions" within the meaning of section 10. If the Program as you |
| 427 | received it, or any part of it, contains a notice stating that it is |
| 428 | governed by this License along with a term that is a further |
| 429 | restriction, you may remove that term. If a license document contains |
| 430 | a further restriction but permits relicensing or conveying under this |
| 431 | License, you may add to a covered work material governed by the terms |
| 432 | of that license document, provided that the further restriction does |
| 433 | not survive such relicensing or conveying. |
| 434 | |
| 435 | If you add terms to a covered work in accord with this section, you |
| 436 | must place, in the relevant source files, a statement of the |
| 437 | additional terms that apply to those files, or a notice indicating |
| 438 | where to find the applicable terms. |
| 439 | |
| 440 | Additional terms, permissive or non-permissive, may be stated in the |
| 441 | form of a separately written license, or stated as exceptions; |
| 442 | the above requirements apply either way. |
| 443 | |
| 444 | @sp 1 |
| 445 | @item |
| 446 | TERMINATION |
| 447 | |
| 448 | You may not propagate or modify a covered work except as expressly |
| 449 | provided under this License. Any attempt otherwise to propagate or |
| 450 | modify it is void, and will automatically terminate your rights under |
| 451 | this License (including any patent licenses granted under the third |
| 452 | paragraph of section 11). |
| 453 | |
| 454 | However, if you cease all violation of this License, then your |
| 455 | license from a particular copyright holder is reinstated (a) |
| 456 | provisionally, unless and until the copyright holder explicitly and |
| 457 | finally terminates your license, and (b) permanently, if the copyright |
| 458 | holder fails to notify you of the violation by some reasonable means |
| 459 | prior to 60 days after the cessation. |
| 460 | |
| 461 | Moreover, your license from a particular copyright holder is |
| 462 | reinstated permanently if the copyright holder notifies you of the |
| 463 | violation by some reasonable means, this is the first time you have |
| 464 | received notice of violation of this License (for any work) from that |
| 465 | copyright holder, and you cure the violation prior to 30 days after |
| 466 | your receipt of the notice. |
| 467 | |
| 468 | Termination of your rights under this section does not terminate the |
| 469 | licenses of parties who have received copies or rights from you under |
| 470 | this License. If your rights have been terminated and not permanently |
| 471 | reinstated, you do not qualify to receive new licenses for the same |
| 472 | material under section 10. |
| 473 | |
| 474 | @sp 1 |
| 475 | @item |
| 476 | ACCEPTANCE NOT REQUIRED FOR HAVING COPIES |
| 477 | |
| 478 | You are not required to accept this License in order to receive or |
| 479 | run a copy of the Program. Ancillary propagation of a covered work |
| 480 | occurring solely as a consequence of using peer-to-peer transmission |
| 481 | to receive a copy likewise does not require acceptance. However, |
| 482 | nothing other than this License grants you permission to propagate or |
| 483 | modify any covered work. These actions infringe copyright if you do |
| 484 | not accept this License. Therefore, by modifying or propagating a |
| 485 | covered work, you indicate your acceptance of this License to do so. |
| 486 | |
| 487 | @sp 1 |
| 488 | @item |
| 489 | AUTOMATIC LICENSING OF DOWNSTREAM RECIPIENTS |
| 490 | |
| 491 | Each time you convey a covered work, the recipient automatically |
| 492 | receives a license from the original licensors, to run, modify and |
| 493 | propagate that work, subject to this License. You are not responsible |
| 494 | for enforcing compliance by third parties with this License. |
| 495 | |
| 496 | An "entity transaction" is a transaction transferring control of an |
| 497 | organization, or substantially all assets of one, or subdividing an |
| 498 | organization, or merging organizations. If propagation of a covered |
| 499 | work results from an entity transaction, each party to that |
| 500 | transaction who receives a copy of the work also receives whatever |
| 501 | licenses to the work the party's predecessor in interest had or could |
| 502 | give under the previous paragraph, plus a right to possession of the |
| 503 | Corresponding Source of the work from the predecessor in interest, if |
| 504 | the predecessor has it or can get it with reasonable efforts. |
| 505 | |
| 506 | You may not impose any further restrictions on the exercise of the |
| 507 | rights granted or affirmed under this License. For example, you may |
| 508 | not impose a license fee, royalty, or other charge for exercise of |
| 509 | rights granted under this License, and you may not initiate litigation |
| 510 | (including a cross-claim or counterclaim in a lawsuit) alleging that |
| 511 | any patent claim is infringed by making, using, selling, offering for |
| 512 | sale, or importing the Program or any portion of it. |
| 513 | |
| 514 | @sp 1 |
| 515 | @item |
| 516 | PATENTS |
| 517 | |
| 518 | A "contributor" is a copyright holder who authorizes use under this |
| 519 | License of the Program or a work on which the Program is based. The |
| 520 | work thus licensed is called the contributor's "contributor version". |
| 521 | |
| 522 | A contributor's "essential patent claims" are all patent claims |
| 523 | owned or controlled by the contributor, whether already acquired or |
| 524 | hereafter acquired, that would be infringed by some manner, permitted |
| 525 | by this License, of making, using, or selling its contributor version, |
| 526 | but do not include claims that would be infringed only as a |
| 527 | consequence of further modification of the contributor version. For |
| 528 | purposes of this definition, "control" includes the right to grant |
| 529 | patent sublicenses in a manner consistent with the requirements of |
| 530 | this License. |
| 531 | |
| 532 | Each contributor grants you a non-exclusive, worldwide, royalty-free |
| 533 | patent license under the contributor's essential patent claims, to |
| 534 | make, use, sell, offer for sale, import and otherwise run, modify and |
| 535 | propagate the contents of its contributor version. |
| 536 | |
| 537 | In the following three paragraphs, a "patent license" is any express |
| 538 | agreement or commitment, however denominated, not to enforce a patent |
| 539 | (such as an express permission to practice a patent or covenant not to |
| 540 | sue for patent infringement). To "grant" such a patent license to a |
| 541 | party means to make such an agreement or commitment not to enforce a |
| 542 | patent against the party. |
| 543 | |
| 544 | If you convey a covered work, knowingly relying on a patent license, |
| 545 | and the Corresponding Source of the work is not available for anyone |
| 546 | to copy, free of charge and under the terms of this License, through a |
| 547 | publicly available network server or other readily accessible means, |
| 548 | then you must either (1) cause the Corresponding Source to be so |
| 549 | available, or (2) arrange to deprive yourself of the benefit of the |
| 550 | patent license for this particular work, or (3) arrange, in a manner |
| 551 | consistent with the requirements of this License, to extend the patent |
| 552 | license to downstream recipients. "Knowingly relying" means you have |
| 553 | actual knowledge that, but for the patent license, your conveying the |
| 554 | covered work in a country, or your recipient's use of the covered work |
| 555 | in a country, would infringe one or more identifiable patents in that |
| 556 | country that you have reason to believe are valid. |
| 557 | |
| 558 | If, pursuant to or in connection with a single transaction or |
| 559 | arrangement, you convey, or propagate by procuring conveyance of, a |
| 560 | covered work, and grant a patent license to some of the parties |
| 561 | receiving the covered work authorizing them to use, propagate, modify |
| 562 | or convey a specific copy of the covered work, then the patent license |
| 563 | you grant is automatically extended to all recipients of the covered |
| 564 | work and works based on it. |
| 565 | |
| 566 | A patent license is "discriminatory" if it does not include within |
| 567 | the scope of its coverage, prohibits the exercise of, or is |
| 568 | conditioned on the non-exercise of one or more of the rights that are |
| 569 | specifically granted under this License. You may not convey a covered |
| 570 | work if you are a party to an arrangement with a third party that is |
| 571 | in the business of distributing software, under which you make payment |
| 572 | to the third party based on the extent of your activity of conveying |
| 573 | the work, and under which the third party grants, to any of the |
| 574 | parties who would receive the covered work from you, a discriminatory |
| 575 | patent license (a) in connection with copies of the covered work |
| 576 | conveyed by you (or copies made from those copies), or (b) primarily |
| 577 | for and in connection with specific products or compilations that |
| 578 | contain the covered work, unless you entered into that arrangement, |
| 579 | or that patent license was granted, prior to 28 March 2007. |
| 580 | |
| 581 | Nothing in this License shall be construed as excluding or limiting |
| 582 | any implied license or other defenses to infringement that may |
| 583 | otherwise be available to you under applicable patent law. |
| 584 | |
| 585 | @sp 1 |
| 586 | @item |
| 587 | NO SURRENDER OF OTHERS' FREEDOM |
| 588 | |
| 589 | If conditions are imposed on you (whether by court order, agreement or |
| 590 | otherwise) that contradict the conditions of this License, they do not |
| 591 | excuse you from the conditions of this License. If you cannot convey a |
| 592 | covered work so as to satisfy simultaneously your obligations under this |
| 593 | License and any other pertinent obligations, then as a consequence you may |
| 594 | not convey it at all. For example, if you agree to terms that obligate you |
| 595 | to collect a royalty for further conveying from those to whom you convey |
| 596 | the Program, the only way you could satisfy both those terms and this |
| 597 | License would be to refrain entirely from conveying the Program. |
| 598 | |
| 599 | @sp 1 |
| 600 | @item |
| 601 | USE WITH THE GNU AFFERO GENERAL PUBLIC LICENSE |
| 602 | |
| 603 | Notwithstanding any other provision of this License, you have |
| 604 | permission to link or combine any covered work with a work licensed |
| 605 | under version 3 of the GNU Affero General Public License into a single |
| 606 | combined work, and to convey the resulting work. The terms of this |
| 607 | License will continue to apply to the part which is the covered work, |
| 608 | but the special requirements of the GNU Affero General Public License, |
| 609 | section 13, concerning interaction through a network will apply to the |
| 610 | combination as such. |
| 611 | |
| 612 | @sp 1 |
| 613 | @item |
| 614 | REVISED VERSIONS OF THIS LICENSE |
| 615 | |
| 616 | The Free Software Foundation may publish revised and/or new versions of |
| 617 | the GNU General Public License from time to time. Such new versions will |
| 618 | be similar in spirit to the present version, but may differ in detail to |
| 619 | address new problems or concerns. |
| 620 | |
| 621 | Each version is given a distinguishing version number. If the |
| 622 | Program specifies that a certain numbered version of the GNU General |
| 623 | Public License "or any later version" applies to it, you have the |
| 624 | option of following the terms and conditions either of that numbered |
| 625 | version or of any later version published by the Free Software |
| 626 | Foundation. If the Program does not specify a version number of the |
| 627 | GNU General Public License, you may choose any version ever published |
| 628 | by the Free Software Foundation. |
| 629 | |
| 630 | If the Program specifies that a proxy can decide which future |
| 631 | versions of the GNU General Public License can be used, that proxy's |
| 632 | public statement of acceptance of a version permanently authorizes you |
| 633 | to choose that version for the Program. |
| 634 | |
| 635 | Later license versions may give you additional or different |
| 636 | permissions. However, no additional obligations are imposed on any |
| 637 | author or copyright holder as a result of your choosing to follow a |
| 638 | later version. |
| 639 | |
| 640 | @sp 1 |
| 641 | @item |
| 642 | DISCLAIMER OF WARRANTY |
| 643 | |
| 644 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY |
| 645 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT |
| 646 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY |
| 647 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, |
| 648 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 649 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM |
| 650 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF |
| 651 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
| 652 | |
| 653 | @sp 1 |
| 654 | @item |
| 655 | LIMITATION OF LIABILITY. |
| 656 | |
| 657 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
| 658 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS |
| 659 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY |
| 660 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE |
| 661 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF |
| 662 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD |
| 663 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), |
| 664 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF |
| 665 | SUCH DAMAGES. |
| 666 | |
| 667 | @sp 1 |
| 668 | @item |
| 669 | INTERPRETATION OF SECTIONS 15 AND 16 |
| 670 | |
| 671 | If the disclaimer of warranty and limitation of liability provided |
| 672 | above cannot be given local legal effect according to their terms, |
| 673 | reviewing courts shall apply local law that most closely approximates |
| 674 | an absolute waiver of all civil liability in connection with the |
| 675 | Program, unless a warranty or assumption of liability accompanies a |
| 676 | copy of the Program in return for a fee. |
| 677 | |
| 678 | @end enumerate |
| 679 | |
| 680 | @unnumberedsec How to Apply These Terms to your New Programs |
| 681 | |
| 682 | If you develop a new program, and you want it to be of the greatest |
| 683 | possible use to the public, the best way to achieve this is to make it |
| 684 | free software which everyone can redistribute and change under these terms. |
| 685 | |
| 686 | To do so, attach the following notices to the program. It is safest |
| 687 | to attach them to the start of each source file to most effectively |
| 688 | state the exclusion of warranty; and each file should have at least |
| 689 | the "copyright" line and a pointer to where the full notice is found. |
| 690 | |
| 691 | <one line to give the program's name and a brief idea of what it does.> |
| 692 | Copyright (C) <year> <name of author> |
| 693 | |
| 694 | This program is free software: you can redistribute it and/or modify |
| 695 | it under the terms of the GNU General Public License as published by |
| 696 | the Free Software Foundation, either version 3 of the License, or |
| 697 | (at your option) any later version. |
| 698 | |
| 699 | This program is distributed in the hope that it will be useful, |
| 700 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 701 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 702 | GNU General Public License for more details. |
| 703 | |
| 704 | You should have received a copy of the GNU General Public License |
| 705 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 706 | |
| 707 | Also add information on how to contact you by electronic and paper mail. |
| 708 | |
| 709 | If the program does terminal interaction, make it output a short |
| 710 | notice like this when it starts in an interactive mode: |
| 711 | |
| 712 | <program> Copyright (C) <year> <name of author> |
| 713 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. |
| 714 | This is free software, and you are welcome to redistribute it |
| 715 | under certain conditions; type `show c' for details. |
| 716 | |
| 717 | The hypothetical commands `show w' and `show c' should show the appropriate |
| 718 | parts of the General Public License. Of course, your program's commands |
| 719 | might be different; for a GUI interface, you would use an "about box". |
| 720 | |
| 721 | You should also get your employer (if you work as a programmer) or school, |
| 722 | if any, to sign a "copyright disclaimer" for the program, if necessary. |
| 723 | For more information on this, and how to apply and follow the GNU GPL, see |
| 724 | <http://www.gnu.org/licenses/>. |
| 725 | |
| 726 | The GNU General Public License does not permit incorporating your program |
| 727 | into proprietary programs. If your program is a subroutine library, you |
| 728 | may consider it more useful to permit linking proprietary applications with |
| 729 | the library. If this is what you want to do, use the GNU Lesser General |
| 730 | Public License instead of this License. But first, please read |
| 731 | <http://www.gnu.org/philosophy/why-not-lgpl.html>. |
| 732 | |
| 733 | @node GFDL, GTP License, GPL, Copying |
| 734 | @cindex licence, documentation (GFDL) |
| 735 | |
| 736 | @section GNU FREE DOCUMENTATION LICENSE |
| 737 | |
| 738 | @c The GNU Free Documentation License. |
| 739 | @center Version 1.3, 3 November 2008 |
| 740 | |
| 741 | @c This file is intended to be included within another document, |
| 742 | @c hence no sectioning command or @node. |
| 743 | |
| 744 | @display |
| 745 | Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc. |
| 746 | @uref{http://fsf.org/} |
| 747 | |
| 748 | Everyone is permitted to copy and distribute verbatim copies |
| 749 | of this license document, but changing it is not allowed. |
| 750 | @end display |
| 751 | |
| 752 | @enumerate 0 |
| 753 | @item |
| 754 | PREAMBLE |
| 755 | |
| 756 | The purpose of this License is to make a manual, textbook, or other |
| 757 | functional and useful document @dfn{free} in the sense of freedom: to |
| 758 | assure everyone the effective freedom to copy and redistribute it, |
| 759 | with or without modifying it, either commercially or noncommercially. |
| 760 | Secondarily, this License preserves for the author and publisher a way |
| 761 | to get credit for their work, while not being considered responsible |
| 762 | for modifications made by others. |
| 763 | |
| 764 | This License is a kind of ``copyleft'', which means that derivative |
| 765 | works of the document must themselves be free in the same sense. It |
| 766 | complements the GNU General Public License, which is a copyleft |
| 767 | license designed for free software. |
| 768 | |
| 769 | We have designed this License in order to use it for manuals for free |
| 770 | software, because free software needs free documentation: a free |
| 771 | program should come with manuals providing the same freedoms that the |
| 772 | software does. But this License is not limited to software manuals; |
| 773 | it can be used for any textual work, regardless of subject matter or |
| 774 | whether it is published as a printed book. We recommend this License |
| 775 | principally for works whose purpose is instruction or reference. |
| 776 | |
| 777 | @item |
| 778 | APPLICABILITY AND DEFINITIONS |
| 779 | |
| 780 | This License applies to any manual or other work, in any medium, that |
| 781 | contains a notice placed by the copyright holder saying it can be |
| 782 | distributed under the terms of this License. Such a notice grants a |
| 783 | world-wide, royalty-free license, unlimited in duration, to use that |
| 784 | work under the conditions stated herein. The ``Document'', below, |
| 785 | refers to any such manual or work. Any member of the public is a |
| 786 | licensee, and is addressed as ``you''. You accept the license if you |
| 787 | copy, modify or distribute the work in a way requiring permission |
| 788 | under copyright law. |
| 789 | |
| 790 | A ``Modified Version'' of the Document means any work containing the |
| 791 | Document or a portion of it, either copied verbatim, or with |
| 792 | modifications and/or translated into another language. |
| 793 | |
| 794 | A ``Secondary Section'' is a named appendix or a front-matter section |
| 795 | of the Document that deals exclusively with the relationship of the |
| 796 | publishers or authors of the Document to the Document's overall |
| 797 | subject (or to related matters) and contains nothing that could fall |
| 798 | directly within that overall subject. (Thus, if the Document is in |
| 799 | part a textbook of mathematics, a Secondary Section may not explain |
| 800 | any mathematics.) The relationship could be a matter of historical |
| 801 | connection with the subject or with related matters, or of legal, |
| 802 | commercial, philosophical, ethical or political position regarding |
| 803 | them. |
| 804 | |
| 805 | The ``Invariant Sections'' are certain Secondary Sections whose titles |
| 806 | are designated, as being those of Invariant Sections, in the notice |
| 807 | that says that the Document is released under this License. If a |
| 808 | section does not fit the above definition of Secondary then it is not |
| 809 | allowed to be designated as Invariant. The Document may contain zero |
| 810 | Invariant Sections. If the Document does not identify any Invariant |
| 811 | Sections then there are none. |
| 812 | |
| 813 | The ``Cover Texts'' are certain short passages of text that are listed, |
| 814 | as Front-Cover Texts or Back-Cover Texts, in the notice that says that |
| 815 | the Document is released under this License. A Front-Cover Text may |
| 816 | be at most 5 words, and a Back-Cover Text may be at most 25 words. |
| 817 | |
| 818 | A ``Transparent'' copy of the Document means a machine-readable copy, |
| 819 | represented in a format whose specification is available to the |
| 820 | general public, that is suitable for revising the document |
| 821 | straightforwardly with generic text editors or (for images composed of |
| 822 | pixels) generic paint programs or (for drawings) some widely available |
| 823 | drawing editor, and that is suitable for input to text formatters or |
| 824 | for automatic translation to a variety of formats suitable for input |
| 825 | to text formatters. A copy made in an otherwise Transparent file |
| 826 | format whose markup, or absence of markup, has been arranged to thwart |
| 827 | or discourage subsequent modification by readers is not Transparent. |
| 828 | An image format is not Transparent if used for any substantial amount |
| 829 | of text. A copy that is not ``Transparent'' is called ``Opaque''. |
| 830 | |
| 831 | Examples of suitable formats for Transparent copies include plain |
| 832 | @sc{ascii} without markup, Texinfo input format, La@TeX{} input |
| 833 | format, @acronym{SGML} or @acronym{XML} using a publicly available |
| 834 | @acronym{DTD}, and standard-conforming simple @acronym{HTML}, |
| 835 | PostScript or @acronym{PDF} designed for human modification. Examples |
| 836 | of transparent image formats include @acronym{PNG}, @acronym{XCF} and |
| 837 | @acronym{JPG}. Opaque formats include proprietary formats that can be |
| 838 | read and edited only by proprietary word processors, @acronym{SGML} or |
| 839 | @acronym{XML} for which the @acronym{DTD} and/or processing tools are |
| 840 | not generally available, and the machine-generated @acronym{HTML}, |
| 841 | PostScript or @acronym{PDF} produced by some word processors for |
| 842 | output purposes only. |
| 843 | |
| 844 | The ``Title Page'' means, for a printed book, the title page itself, |
| 845 | plus such following pages as are needed to hold, legibly, the material |
| 846 | this License requires to appear in the title page. For works in |
| 847 | formats which do not have any title page as such, ``Title Page'' means |
| 848 | the text near the most prominent appearance of the work's title, |
| 849 | preceding the beginning of the body of the text. |
| 850 | |
| 851 | The ``publisher'' means any person or entity that distributes copies |
| 852 | of the Document to the public. |
| 853 | |
| 854 | A section ``Entitled XYZ'' means a named subunit of the Document whose |
| 855 | title either is precisely XYZ or contains XYZ in parentheses following |
| 856 | text that translates XYZ in another language. (Here XYZ stands for a |
| 857 | specific section name mentioned below, such as ``Acknowledgements'', |
| 858 | ``Dedications'', ``Endorsements'', or ``History''.) To ``Preserve the Title'' |
| 859 | of such a section when you modify the Document means that it remains a |
| 860 | section ``Entitled XYZ'' according to this definition. |
| 861 | |
| 862 | The Document may include Warranty Disclaimers next to the notice which |
| 863 | states that this License applies to the Document. These Warranty |
| 864 | Disclaimers are considered to be included by reference in this |
| 865 | License, but only as regards disclaiming warranties: any other |
| 866 | implication that these Warranty Disclaimers may have is void and has |
| 867 | no effect on the meaning of this License. |
| 868 | |
| 869 | @item |
| 870 | VERBATIM COPYING |
| 871 | |
| 872 | You may copy and distribute the Document in any medium, either |
| 873 | commercially or noncommercially, provided that this License, the |
| 874 | copyright notices, and the license notice saying this License applies |
| 875 | to the Document are reproduced in all copies, and that you add no other |
| 876 | conditions whatsoever to those of this License. You may not use |
| 877 | technical measures to obstruct or control the reading or further |
| 878 | copying of the copies you make or distribute. However, you may accept |
| 879 | compensation in exchange for copies. If you distribute a large enough |
| 880 | number of copies you must also follow the conditions in section 3. |
| 881 | |
| 882 | You may also lend copies, under the same conditions stated above, and |
| 883 | you may publicly display copies. |
| 884 | |
| 885 | @item |
| 886 | COPYING IN QUANTITY |
| 887 | |
| 888 | If you publish printed copies (or copies in media that commonly have |
| 889 | printed covers) of the Document, numbering more than 100, and the |
| 890 | Document's license notice requires Cover Texts, you must enclose the |
| 891 | copies in covers that carry, clearly and legibly, all these Cover |
| 892 | Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on |
| 893 | the back cover. Both covers must also clearly and legibly identify |
| 894 | you as the publisher of these copies. The front cover must present |
| 895 | the full title with all words of the title equally prominent and |
| 896 | visible. You may add other material on the covers in addition. |
| 897 | Copying with changes limited to the covers, as long as they preserve |
| 898 | the title of the Document and satisfy these conditions, can be treated |
| 899 | as verbatim copying in other respects. |
| 900 | |
| 901 | If the required texts for either cover are too voluminous to fit |
| 902 | legibly, you should put the first ones listed (as many as fit |
| 903 | reasonably) on the actual cover, and continue the rest onto adjacent |
| 904 | pages. |
| 905 | |
| 906 | If you publish or distribute Opaque copies of the Document numbering |
| 907 | more than 100, you must either include a machine-readable Transparent |
| 908 | copy along with each Opaque copy, or state in or with each Opaque copy |
| 909 | a computer-network location from which the general network-using |
| 910 | public has access to download using public-standard network protocols |
| 911 | a complete Transparent copy of the Document, free of added material. |
| 912 | If you use the latter option, you must take reasonably prudent steps, |
| 913 | when you begin distribution of Opaque copies in quantity, to ensure |
| 914 | that this Transparent copy will remain thus accessible at the stated |
| 915 | location until at least one year after the last time you distribute an |
| 916 | Opaque copy (directly or through your agents or retailers) of that |
| 917 | edition to the public. |
| 918 | |
| 919 | It is requested, but not required, that you contact the authors of the |
| 920 | Document well before redistributing any large number of copies, to give |
| 921 | them a chance to provide you with an updated version of the Document. |
| 922 | |
| 923 | @item |
| 924 | MODIFICATIONS |
| 925 | |
| 926 | You may copy and distribute a Modified Version of the Document under |
| 927 | the conditions of sections 2 and 3 above, provided that you release |
| 928 | the Modified Version under precisely this License, with the Modified |
| 929 | Version filling the role of the Document, thus licensing distribution |
| 930 | and modification of the Modified Version to whoever possesses a copy |
| 931 | of it. In addition, you must do these things in the Modified Version: |
| 932 | |
| 933 | @enumerate A |
| 934 | @item |
| 935 | Use in the Title Page (and on the covers, if any) a title distinct |
| 936 | from that of the Document, and from those of previous versions |
| 937 | (which should, if there were any, be listed in the History section |
| 938 | of the Document). You may use the same title as a previous version |
| 939 | if the original publisher of that version gives permission. |
| 940 | |
| 941 | @item |
| 942 | List on the Title Page, as authors, one or more persons or entities |
| 943 | responsible for authorship of the modifications in the Modified |
| 944 | Version, together with at least five of the principal authors of the |
| 945 | Document (all of its principal authors, if it has fewer than five), |
| 946 | unless they release you from this requirement. |
| 947 | |
| 948 | @item |
| 949 | State on the Title page the name of the publisher of the |
| 950 | Modified Version, as the publisher. |
| 951 | |
| 952 | @item |
| 953 | Preserve all the copyright notices of the Document. |
| 954 | |
| 955 | @item |
| 956 | Add an appropriate copyright notice for your modifications |
| 957 | adjacent to the other copyright notices. |
| 958 | |
| 959 | @item |
| 960 | Include, immediately after the copyright notices, a license notice |
| 961 | giving the public permission to use the Modified Version under the |
| 962 | terms of this License, in the form shown in the Addendum below. |
| 963 | |
| 964 | @item |
| 965 | Preserve in that license notice the full lists of Invariant Sections |
| 966 | and required Cover Texts given in the Document's license notice. |
| 967 | |
| 968 | @item |
| 969 | Include an unaltered copy of this License. |
| 970 | |
| 971 | @item |
| 972 | Preserve the section Entitled ``History'', Preserve its Title, and add |
| 973 | to it an item stating at least the title, year, new authors, and |
| 974 | publisher of the Modified Version as given on the Title Page. If |
| 975 | there is no section Entitled ``History'' in the Document, create one |
| 976 | stating the title, year, authors, and publisher of the Document as |
| 977 | given on its Title Page, then add an item describing the Modified |
| 978 | Version as stated in the previous sentence. |
| 979 | |
| 980 | @item |
| 981 | Preserve the network location, if any, given in the Document for |
| 982 | public access to a Transparent copy of the Document, and likewise |
| 983 | the network locations given in the Document for previous versions |
| 984 | it was based on. These may be placed in the ``History'' section. |
| 985 | You may omit a network location for a work that was published at |
| 986 | least four years before the Document itself, or if the original |
| 987 | publisher of the version it refers to gives permission. |
| 988 | |
| 989 | @item |
| 990 | For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve |
| 991 | the Title of the section, and preserve in the section all the |
| 992 | substance and tone of each of the contributor acknowledgements and/or |
| 993 | dedications given therein. |
| 994 | |
| 995 | @item |
| 996 | Preserve all the Invariant Sections of the Document, |
| 997 | unaltered in their text and in their titles. Section numbers |
| 998 | or the equivalent are not considered part of the section titles. |
| 999 | |
| 1000 | @item |
| 1001 | Delete any section Entitled ``Endorsements''. Such a section |
| 1002 | may not be included in the Modified Version. |
| 1003 | |
| 1004 | @item |
| 1005 | Do not retitle any existing section to be Entitled ``Endorsements'' or |
| 1006 | to conflict in title with any Invariant Section. |
| 1007 | |
| 1008 | @item |
| 1009 | Preserve any Warranty Disclaimers. |
| 1010 | @end enumerate |
| 1011 | |
| 1012 | If the Modified Version includes new front-matter sections or |
| 1013 | appendices that qualify as Secondary Sections and contain no material |
| 1014 | copied from the Document, you may at your option designate some or all |
| 1015 | of these sections as invariant. To do this, add their titles to the |
| 1016 | list of Invariant Sections in the Modified Version's license notice. |
| 1017 | These titles must be distinct from any other section titles. |
| 1018 | |
| 1019 | You may add a section Entitled ``Endorsements'', provided it contains |
| 1020 | nothing but endorsements of your Modified Version by various |
| 1021 | parties---for example, statements of peer review or that the text has |
| 1022 | been approved by an organization as the authoritative definition of a |
| 1023 | standard. |
| 1024 | |
| 1025 | You may add a passage of up to five words as a Front-Cover Text, and a |
| 1026 | passage of up to 25 words as a Back-Cover Text, to the end of the list |
| 1027 | of Cover Texts in the Modified Version. Only one passage of |
| 1028 | Front-Cover Text and one of Back-Cover Text may be added by (or |
| 1029 | through arrangements made by) any one entity. If the Document already |
| 1030 | includes a cover text for the same cover, previously added by you or |
| 1031 | by arrangement made by the same entity you are acting on behalf of, |
| 1032 | you may not add another; but you may replace the old one, on explicit |
| 1033 | permission from the previous publisher that added the old one. |
| 1034 | |
| 1035 | The author(s) and publisher(s) of the Document do not by this License |
| 1036 | give permission to use their names for publicity for or to assert or |
| 1037 | imply endorsement of any Modified Version. |
| 1038 | |
| 1039 | @item |
| 1040 | COMBINING DOCUMENTS |
| 1041 | |
| 1042 | You may combine the Document with other documents released under this |
| 1043 | License, under the terms defined in section 4 above for modified |
| 1044 | versions, provided that you include in the combination all of the |
| 1045 | Invariant Sections of all of the original documents, unmodified, and |
| 1046 | list them all as Invariant Sections of your combined work in its |
| 1047 | license notice, and that you preserve all their Warranty Disclaimers. |
| 1048 | |
| 1049 | The combined work need only contain one copy of this License, and |
| 1050 | multiple identical Invariant Sections may be replaced with a single |
| 1051 | copy. If there are multiple Invariant Sections with the same name but |
| 1052 | different contents, make the title of each such section unique by |
| 1053 | adding at the end of it, in parentheses, the name of the original |
| 1054 | author or publisher of that section if known, or else a unique number. |
| 1055 | Make the same adjustment to the section titles in the list of |
| 1056 | Invariant Sections in the license notice of the combined work. |
| 1057 | |
| 1058 | In the combination, you must combine any sections Entitled ``History'' |
| 1059 | in the various original documents, forming one section Entitled |
| 1060 | ``History''; likewise combine any sections Entitled ``Acknowledgements'', |
| 1061 | and any sections Entitled ``Dedications''. You must delete all |
| 1062 | sections Entitled ``Endorsements.'' |
| 1063 | |
| 1064 | @item |
| 1065 | COLLECTIONS OF DOCUMENTS |
| 1066 | |
| 1067 | You may make a collection consisting of the Document and other documents |
| 1068 | released under this License, and replace the individual copies of this |
| 1069 | License in the various documents with a single copy that is included in |
| 1070 | the collection, provided that you follow the rules of this License for |
| 1071 | verbatim copying of each of the documents in all other respects. |
| 1072 | |
| 1073 | You may extract a single document from such a collection, and distribute |
| 1074 | it individually under this License, provided you insert a copy of this |
| 1075 | License into the extracted document, and follow this License in all |
| 1076 | other respects regarding verbatim copying of that document. |
| 1077 | |
| 1078 | @item |
| 1079 | AGGREGATION WITH INDEPENDENT WORKS |
| 1080 | |
| 1081 | A compilation of the Document or its derivatives with other separate |
| 1082 | and independent documents or works, in or on a volume of a storage or |
| 1083 | distribution medium, is called an ``aggregate'' if the copyright |
| 1084 | resulting from the compilation is not used to limit the legal rights |
| 1085 | of the compilation's users beyond what the individual works permit. |
| 1086 | When the Document is included in an aggregate, this License does not |
| 1087 | apply to the other works in the aggregate which are not themselves |
| 1088 | derivative works of the Document. |
| 1089 | |
| 1090 | If the Cover Text requirement of section 3 is applicable to these |
| 1091 | copies of the Document, then if the Document is less than one half of |
| 1092 | the entire aggregate, the Document's Cover Texts may be placed on |
| 1093 | covers that bracket the Document within the aggregate, or the |
| 1094 | electronic equivalent of covers if the Document is in electronic form. |
| 1095 | Otherwise they must appear on printed covers that bracket the whole |
| 1096 | aggregate. |
| 1097 | |
| 1098 | @item |
| 1099 | TRANSLATION |
| 1100 | |
| 1101 | Translation is considered a kind of modification, so you may |
| 1102 | distribute translations of the Document under the terms of section 4. |
| 1103 | Replacing Invariant Sections with translations requires special |
| 1104 | permission from their copyright holders, but you may include |
| 1105 | translations of some or all Invariant Sections in addition to the |
| 1106 | original versions of these Invariant Sections. You may include a |
| 1107 | translation of this License, and all the license notices in the |
| 1108 | Document, and any Warranty Disclaimers, provided that you also include |
| 1109 | the original English version of this License and the original versions |
| 1110 | of those notices and disclaimers. In case of a disagreement between |
| 1111 | the translation and the original version of this License or a notice |
| 1112 | or disclaimer, the original version will prevail. |
| 1113 | |
| 1114 | If a section in the Document is Entitled ``Acknowledgements'', |
| 1115 | ``Dedications'', or ``History'', the requirement (section 4) to Preserve |
| 1116 | its Title (section 1) will typically require changing the actual |
| 1117 | title. |
| 1118 | |
| 1119 | @item |
| 1120 | TERMINATION |
| 1121 | |
| 1122 | You may not copy, modify, sublicense, or distribute the Document |
| 1123 | except as expressly provided under this License. Any attempt |
| 1124 | otherwise to copy, modify, sublicense, or distribute it is void, and |
| 1125 | will automatically terminate your rights under this License. |
| 1126 | |
| 1127 | However, if you cease all violation of this License, then your license |
| 1128 | from a particular copyright holder is reinstated (a) provisionally, |
| 1129 | unless and until the copyright holder explicitly and finally |
| 1130 | terminates your license, and (b) permanently, if the copyright holder |
| 1131 | fails to notify you of the violation by some reasonable means prior to |
| 1132 | 60 days after the cessation. |
| 1133 | |
| 1134 | Moreover, your license from a particular copyright holder is |
| 1135 | reinstated permanently if the copyright holder notifies you of the |
| 1136 | violation by some reasonable means, this is the first time you have |
| 1137 | received notice of violation of this License (for any work) from that |
| 1138 | copyright holder, and you cure the violation prior to 30 days after |
| 1139 | your receipt of the notice. |
| 1140 | |
| 1141 | Termination of your rights under this section does not terminate the |
| 1142 | licenses of parties who have received copies or rights from you under |
| 1143 | this License. If your rights have been terminated and not permanently |
| 1144 | reinstated, receipt of a copy of some or all of the same material does |
| 1145 | not give you any rights to use it. |
| 1146 | |
| 1147 | @item |
| 1148 | FUTURE REVISIONS OF THIS LICENSE |
| 1149 | |
| 1150 | The Free Software Foundation may publish new, revised versions |
| 1151 | of the GNU Free Documentation License from time to time. Such new |
| 1152 | versions will be similar in spirit to the present version, but may |
| 1153 | differ in detail to address new problems or concerns. See |
| 1154 | @uref{http://www.gnu.org/copyleft/}. |
| 1155 | |
| 1156 | Each version of the License is given a distinguishing version number. |
| 1157 | If the Document specifies that a particular numbered version of this |
| 1158 | License ``or any later version'' applies to it, you have the option of |
| 1159 | following the terms and conditions either of that specified version or |
| 1160 | of any later version that has been published (not as a draft) by the |
| 1161 | Free Software Foundation. If the Document does not specify a version |
| 1162 | number of this License, you may choose any version ever published (not |
| 1163 | as a draft) by the Free Software Foundation. If the Document |
| 1164 | specifies that a proxy can decide which future versions of this |
| 1165 | License can be used, that proxy's public statement of acceptance of a |
| 1166 | version permanently authorizes you to choose that version for the |
| 1167 | Document. |
| 1168 | |
| 1169 | @item |
| 1170 | RELICENSING |
| 1171 | |
| 1172 | ``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any |
| 1173 | World Wide Web server that publishes copyrightable works and also |
| 1174 | provides prominent facilities for anybody to edit those works. A |
| 1175 | public wiki that anybody can edit is an example of such a server. A |
| 1176 | ``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the |
| 1177 | site means any set of copyrightable works thus published on the MMC |
| 1178 | site. |
| 1179 | |
| 1180 | ``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0 |
| 1181 | license published by Creative Commons Corporation, a not-for-profit |
| 1182 | corporation with a principal place of business in San Francisco, |
| 1183 | California, as well as future copyleft versions of that license |
| 1184 | published by that same organization. |
| 1185 | |
| 1186 | ``Incorporate'' means to publish or republish a Document, in whole or |
| 1187 | in part, as part of another Document. |
| 1188 | |
| 1189 | An MMC is ``eligible for relicensing'' if it is licensed under this |
| 1190 | License, and if all works that were first published under this License |
| 1191 | somewhere other than this MMC, and subsequently incorporated in whole |
| 1192 | or in part into the MMC, (1) had no cover texts or invariant sections, |
| 1193 | and (2) were thus incorporated prior to November 1, 2008. |
| 1194 | |
| 1195 | The operator of an MMC Site may republish an MMC contained in the site |
| 1196 | under CC-BY-SA on the same site at any time before August 1, 2009, |
| 1197 | provided the MMC is eligible for relicensing. |
| 1198 | |
| 1199 | @end enumerate |
| 1200 | |
| 1201 | @page |
| 1202 | @heading ADDENDUM: How to use this License for your documents |
| 1203 | |
| 1204 | To use this License in a document you have written, include a copy of |
| 1205 | the License in the document and put the following copyright and |
| 1206 | license notices just after the title page: |
| 1207 | |
| 1208 | @smallexample |
| 1209 | @group |
| 1210 | Copyright (C) @var{year} @var{your name}. |
| 1211 | Permission is granted to copy, distribute and/or modify this document |
| 1212 | under the terms of the GNU Free Documentation License, Version 1.3 |
| 1213 | or any later version published by the Free Software Foundation; |
| 1214 | with no Invariant Sections, no Front-Cover Texts, and no Back-Cover |
| 1215 | Texts. A copy of the license is included in the section entitled ``GNU |
| 1216 | Free Documentation License''. |
| 1217 | @end group |
| 1218 | @end smallexample |
| 1219 | |
| 1220 | If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts, |
| 1221 | replace the ``with@dots{}Texts.'' line with this: |
| 1222 | |
| 1223 | @smallexample |
| 1224 | @group |
| 1225 | with the Invariant Sections being @var{list their titles}, with |
| 1226 | the Front-Cover Texts being @var{list}, and with the Back-Cover Texts |
| 1227 | being @var{list}. |
| 1228 | @end group |
| 1229 | @end smallexample |
| 1230 | |
| 1231 | If you have Invariant Sections without Cover Texts, or some other |
| 1232 | combination of the three, merge those two alternatives to suit the |
| 1233 | situation. |
| 1234 | |
| 1235 | If your document contains nontrivial examples of program code, we |
| 1236 | recommend releasing these examples in parallel under your choice of |
| 1237 | free software license, such as the GNU General Public License, |
| 1238 | to permit their use in free software. |
| 1239 | |
| 1240 | @node GTP License, , GFDL, Copying |
| 1241 | |
| 1242 | @section The Go Text Protocol License |
| 1243 | |
| 1244 | In order to facilitate the use of the Go Text Protocol, the two files |
| 1245 | @file{gtp.c} and @file{gtp.h} are licensed under the following terms. |
| 1246 | |
| 1247 | Copyright 2001 by the Free Software Foundation. |
| 1248 | |
| 1249 | Permission is hereby granted, free of charge, to any person obtaining a copy |
| 1250 | of this file @file{gtp.x}, to deal in the Software without restriction, |
| 1251 | including without limitation the rights to use, copy, modify, merge, publish, |
| 1252 | distribute, and/or sell copies of the Software, and to permit persons to whom |
| 1253 | the Software is furnished to do so, provided that the above copyright |
| 1254 | notice(s) and this permission notice appear in all copies of the Software and |
| 1255 | that both the above copyright notice(s) and this permission notice appear in |
| 1256 | supporting documentation. |
| 1257 | |
| 1258 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 1259 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 1260 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT |
| 1261 | OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| 1262 | HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL |
| 1263 | INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING |
| 1264 | FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, |
| 1265 | NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION |
| 1266 | WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 1267 | |
| 1268 | Except as contained in this notice, the name of a copyright holder |
| 1269 | shall not be used in advertising or otherwise to promote the sale, use |
| 1270 | or other dealings in this Software without prior written authorization |
| 1271 | of the copyright holder. |
| 1272 | |