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| 1 @c The GNU General Public License. |
| 2 @center Version 3, 29 June 2007 |
| 3 |
| 4 @c This file is intended to be included within another document, |
| 5 @c hence no sectioning command or @node. |
| 6 |
| 7 @display |
| 8 Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/} |
| 9 |
| 10 Everyone is permitted to copy and distribute verbatim copies of this |
| 11 license document, but changing it is not allowed. |
| 12 @end display |
| 13 |
| 14 @heading Preamble |
| 15 |
| 16 The GNU General Public License is a free, copyleft license for |
| 17 software and other kinds of works. |
| 18 |
| 19 The licenses for most software and other practical works are designed |
| 20 to take away your freedom to share and change the works. By contrast, |
| 21 the GNU General Public License is intended to guarantee your freedom |
| 22 to share and change all versions of a program---to make sure it remains |
| 23 free software for all its users. We, the Free Software Foundation, |
| 24 use the GNU General Public License for most of our software; it |
| 25 applies also to any other work released this way by its authors. You |
| 26 can apply it to your programs, too. |
| 27 |
| 28 When we speak of free software, we are referring to freedom, not |
| 29 price. Our General Public Licenses are designed to make sure that you |
| 30 have the freedom to distribute copies of free software (and charge for |
| 31 them if you wish), that you receive source code or can get it if you |
| 32 want it, that you can change the software or use pieces of it in new |
| 33 free programs, and that you know you can do these things. |
| 34 |
| 35 To protect your rights, we need to prevent others from denying you |
| 36 these rights or asking you to surrender the rights. Therefore, you |
| 37 have certain responsibilities if you distribute copies of the |
| 38 software, or if you modify it: responsibilities to respect the freedom |
| 39 of others. |
| 40 |
| 41 For example, if you distribute copies of such a program, whether |
| 42 gratis or for a fee, you must pass on to the recipients the same |
| 43 freedoms that you received. You must make sure that they, too, |
| 44 receive or can get the source code. And you must show them these |
| 45 terms so they know their rights. |
| 46 |
| 47 Developers that use the GNU GPL protect your rights with two steps: |
| 48 (1) assert copyright on the software, and (2) offer you this License |
| 49 giving you legal permission to copy, distribute and/or modify it. |
| 50 |
| 51 For the developers' and authors' protection, the GPL clearly explains |
| 52 that there is no warranty for this free software. For both users' and |
| 53 authors' sake, the GPL requires that modified versions be marked as |
| 54 changed, so that their problems will not be attributed erroneously to |
| 55 authors of previous versions. |
| 56 |
| 57 Some devices are designed to deny users access to install or run |
| 58 modified versions of the software inside them, although the |
| 59 manufacturer can do so. This is fundamentally incompatible with the |
| 60 aim of protecting users' freedom to change the software. The |
| 61 systematic pattern of such abuse occurs in the area of products for |
| 62 individuals to use, which is precisely where it is most unacceptable. |
| 63 Therefore, we have designed this version of the GPL to prohibit the |
| 64 practice for those products. If such problems arise substantially in |
| 65 other domains, we stand ready to extend this provision to those |
| 66 domains in future versions of the GPL, as needed to protect the |
| 67 freedom of users. |
| 68 |
| 69 Finally, every program is threatened constantly by software patents. |
| 70 States should not allow patents to restrict development and use of |
| 71 software on general-purpose computers, but in those that do, we wish |
| 72 to avoid the special danger that patents applied to a free program |
| 73 could make it effectively proprietary. To prevent this, the GPL |
| 74 assures that patents cannot be used to render the program non-free. |
| 75 |
| 76 The precise terms and conditions for copying, distribution and |
| 77 modification follow. |
| 78 |
| 79 @heading TERMS AND CONDITIONS |
| 80 |
| 81 @enumerate 0 |
| 82 @item Definitions. |
| 83 |
| 84 ``This License'' refers to version 3 of the GNU General Public License. |
| 85 |
| 86 ``Copyright'' also means copyright-like laws that apply to other kinds |
| 87 of works, such as semiconductor masks. |
| 88 |
| 89 ``The Program'' refers to any copyrightable work licensed under this |
| 90 License. Each licensee is addressed as ``you''. ``Licensees'' and |
| 91 ``recipients'' may be individuals or organizations. |
| 92 |
| 93 To ``modify'' a work means to copy from or adapt all or part of the work |
| 94 in a fashion requiring copyright permission, other than the making of |
| 95 an exact copy. The resulting work is called a ``modified version'' of |
| 96 the earlier work or a work ``based on'' the earlier work. |
| 97 |
| 98 A ``covered work'' means either the unmodified Program or a work based |
| 99 on the Program. |
| 100 |
| 101 To ``propagate'' a work means to do anything with it that, without |
| 102 permission, would make you directly or secondarily liable for |
| 103 infringement under applicable copyright law, except executing it on a |
| 104 computer or modifying a private copy. Propagation includes copying, |
| 105 distribution (with or without modification), making available to the |
| 106 public, and in some countries other activities as well. |
| 107 |
| 108 To ``convey'' a work means any kind of propagation that enables other |
| 109 parties to make or receive copies. Mere interaction with a user |
| 110 through a computer network, with no transfer of a copy, is not |
| 111 conveying. |
| 112 |
| 113 An interactive user interface displays ``Appropriate Legal Notices'' to |
| 114 the extent that it includes a convenient and prominently visible |
| 115 feature that (1) displays an appropriate copyright notice, and (2) |
| 116 tells the user that there is no warranty for the work (except to the |
| 117 extent that warranties are provided), that licensees may convey the |
| 118 work under this License, and how to view a copy of this License. If |
| 119 the interface presents a list of user commands or options, such as a |
| 120 menu, a prominent item in the list meets this criterion. |
| 121 |
| 122 @item Source Code. |
| 123 |
| 124 The ``source code'' for a work means the preferred form of the work for |
| 125 making modifications to it. ``Object code'' means any non-source form |
| 126 of a work. |
| 127 |
| 128 A ``Standard Interface'' means an interface that either is an official |
| 129 standard defined by a recognized standards body, or, in the case of |
| 130 interfaces specified for a particular programming language, one that |
| 131 is widely used among developers working in that language. |
| 132 |
| 133 The ``System Libraries'' of an executable work include anything, other |
| 134 than the work as a whole, that (a) is included in the normal form of |
| 135 packaging a Major Component, but which is not part of that Major |
| 136 Component, and (b) serves only to enable use of the work with that |
| 137 Major Component, or to implement a Standard Interface for which an |
| 138 implementation is available to the public in source code form. A |
| 139 ``Major Component'', in this context, means a major essential component |
| 140 (kernel, window system, and so on) of the specific operating system |
| 141 (if any) on which the executable work runs, or a compiler used to |
| 142 produce the work, or an object code interpreter used to run it. |
| 143 |
| 144 The ``Corresponding Source'' for a work in object code form means all |
| 145 the source code needed to generate, install, and (for an executable |
| 146 work) run the object code and to modify the work, including scripts to |
| 147 control those activities. However, it does not include the work's |
| 148 System Libraries, or general-purpose tools or generally available free |
| 149 programs which are used unmodified in performing those activities but |
| 150 which are not part of the work. For example, Corresponding Source |
| 151 includes interface definition files associated with source files for |
| 152 the work, and the source code for shared libraries and dynamically |
| 153 linked subprograms that the work is specifically designed to require, |
| 154 such as by intimate data communication or control flow between those |
| 155 subprograms and other parts of the work. |
| 156 |
| 157 The Corresponding Source need not include anything that users can |
| 158 regenerate automatically from other parts of the Corresponding Source. |
| 159 |
| 160 The Corresponding Source for a work in source code form is that same |
| 161 work. |
| 162 |
| 163 @item Basic Permissions. |
| 164 |
| 165 All rights granted under this License are granted for the term of |
| 166 copyright on the Program, and are irrevocable provided the stated |
| 167 conditions are met. This License explicitly affirms your unlimited |
| 168 permission to run the unmodified Program. The output from running a |
| 169 covered work is covered by this License only if the output, given its |
| 170 content, constitutes a covered work. This License acknowledges your |
| 171 rights of fair use or other equivalent, as provided by copyright law. |
| 172 |
| 173 You may make, run and propagate covered works that you do not convey, |
| 174 without conditions so long as your license otherwise remains in force. |
| 175 You may convey covered works to others for the sole purpose of having |
| 176 them make modifications exclusively for you, or provide you with |
| 177 facilities for running those works, provided that you comply with the |
| 178 terms of this License in conveying all material for which you do not |
| 179 control copyright. Those thus making or running the covered works for |
| 180 you must do so exclusively on your behalf, under your direction and |
| 181 control, on terms that prohibit them from making any copies of your |
| 182 copyrighted material outside their relationship with you. |
| 183 |
| 184 Conveying under any other circumstances is permitted solely under the |
| 185 conditions stated below. Sublicensing is not allowed; section 10 |
| 186 makes it unnecessary. |
| 187 |
| 188 @item Protecting Users' Legal Rights From Anti-Circumvention Law. |
| 189 |
| 190 No covered work shall be deemed part of an effective technological |
| 191 measure under any applicable law fulfilling obligations under article |
| 192 11 of the WIPO copyright treaty adopted on 20 December 1996, or |
| 193 similar laws prohibiting or restricting circumvention of such |
| 194 measures. |
| 195 |
| 196 When you convey a covered work, you waive any legal power to forbid |
| 197 circumvention of technological measures to the extent such |
| 198 circumvention is effected by exercising rights under this License with |
| 199 respect to the covered work, and you disclaim any intention to limit |
| 200 operation or modification of the work as a means of enforcing, against |
| 201 the work's users, your or third parties' legal rights to forbid |
| 202 circumvention of technological measures. |
| 203 |
| 204 @item Conveying Verbatim Copies. |
| 205 |
| 206 You may convey verbatim copies of the Program's source code as you |
| 207 receive it, in any medium, provided that you conspicuously and |
| 208 appropriately publish on each copy an appropriate copyright notice; |
| 209 keep intact all notices stating that this License and any |
| 210 non-permissive terms added in accord with section 7 apply to the code; |
| 211 keep intact all notices of the absence of any warranty; and give all |
| 212 recipients a copy of this License along with the Program. |
| 213 |
| 214 You may charge any price or no price for each copy that you convey, |
| 215 and you may offer support or warranty protection for a fee. |
| 216 |
| 217 @item Conveying Modified Source Versions. |
| 218 |
| 219 You may convey a work based on the Program, or the modifications to |
| 220 produce it from the Program, in the form of source code under the |
| 221 terms of section 4, provided that you also meet all of these |
| 222 conditions: |
| 223 |
| 224 @enumerate a |
| 225 @item |
| 226 The work must carry prominent notices stating that you modified it, |
| 227 and giving a relevant date. |
| 228 |
| 229 @item |
| 230 The work must carry prominent notices stating that it is released |
| 231 under this License and any conditions added under section 7. This |
| 232 requirement modifies the requirement in section 4 to ``keep intact all |
| 233 notices''. |
| 234 |
| 235 @item |
| 236 You must license the entire work, as a whole, under this License to |
| 237 anyone who comes into possession of a copy. This License will |
| 238 therefore apply, along with any applicable section 7 additional terms, |
| 239 to the whole of the work, and all its parts, regardless of how they |
| 240 are packaged. This License gives no permission to license the work in |
| 241 any other way, but it does not invalidate such permission if you have |
| 242 separately received it. |
| 243 |
| 244 @item |
| 245 If the work has interactive user interfaces, each must display |
| 246 Appropriate Legal Notices; however, if the Program has interactive |
| 247 interfaces that do not display Appropriate Legal Notices, your work |
| 248 need not make them do so. |
| 249 @end enumerate |
| 250 |
| 251 A compilation of a covered work with other separate and independent |
| 252 works, which are not by their nature extensions of the covered work, |
| 253 and which are not combined with it such as to form a larger program, |
| 254 in or on a volume of a storage or distribution medium, is called an |
| 255 ``aggregate'' if the compilation and its resulting copyright are not |
| 256 used to limit the access or legal rights of the compilation's users |
| 257 beyond what the individual works permit. Inclusion of a covered work |
| 258 in an aggregate does not cause this License to apply to the other |
| 259 parts of the aggregate. |
| 260 |
| 261 @item Conveying Non-Source Forms. |
| 262 |
| 263 You may convey a covered work in object code form under the terms of |
| 264 sections 4 and 5, provided that you also convey the machine-readable |
| 265 Corresponding Source under the terms of this License, in one of these |
| 266 ways: |
| 267 |
| 268 @enumerate a |
| 269 @item |
| 270 Convey the object code in, or embodied in, a physical product |
| 271 (including a physical distribution medium), accompanied by the |
| 272 Corresponding Source fixed on a durable physical medium customarily |
| 273 used for software interchange. |
| 274 |
| 275 @item |
| 276 Convey the object code in, or embodied in, a physical product |
| 277 (including a physical distribution medium), accompanied by a written |
| 278 offer, valid for at least three years and valid for as long as you |
| 279 offer spare parts or customer support for that product model, to give |
| 280 anyone who possesses the object code either (1) a copy of the |
| 281 Corresponding Source for all the software in the product that is |
| 282 covered by this License, on a durable physical medium customarily used |
| 283 for software interchange, for a price no more than your reasonable |
| 284 cost of physically performing this conveying of source, or (2) access |
| 285 to copy the Corresponding Source from a network server at no charge. |
| 286 |
| 287 @item |
| 288 Convey individual copies of the object code with a copy of the written |
| 289 offer to provide the Corresponding Source. This alternative is |
| 290 allowed only occasionally and noncommercially, and only if you |
| 291 received the object code with such an offer, in accord with subsection |
| 292 6b. |
| 293 |
| 294 @item |
| 295 Convey the object code by offering access from a designated place |
| 296 (gratis or for a charge), and offer equivalent access to the |
| 297 Corresponding Source in the same way through the same place at no |
| 298 further charge. You need not require recipients to copy the |
| 299 Corresponding Source along with the object code. If the place to copy |
| 300 the object code is a network server, the Corresponding Source may be |
| 301 on a different server (operated by you or a third party) that supports |
| 302 equivalent copying facilities, provided you maintain clear directions |
| 303 next to the object code saying where to find the Corresponding Source. |
| 304 Regardless of what server hosts the Corresponding Source, you remain |
| 305 obligated to ensure that it is available for as long as needed to |
| 306 satisfy these requirements. |
| 307 |
| 308 @item |
| 309 Convey the object code using peer-to-peer transmission, provided you |
| 310 inform other peers where the object code and Corresponding Source of |
| 311 the work are being offered to the general public at no charge under |
| 312 subsection 6d. |
| 313 |
| 314 @end enumerate |
| 315 |
| 316 A separable portion of the object code, whose source code is excluded |
| 317 from the Corresponding Source as a System Library, need not be |
| 318 included in conveying the object code work. |
| 319 |
| 320 A ``User Product'' is either (1) a ``consumer product'', which means any |
| 321 tangible personal property which is normally used for personal, |
| 322 family, or household purposes, or (2) anything designed or sold for |
| 323 incorporation into a dwelling. In determining whether a product is a |
| 324 consumer product, doubtful cases shall be resolved in favor of |
| 325 coverage. For a particular product received by a particular user, |
| 326 ``normally used'' refers to a typical or common use of that class of |
| 327 product, regardless of the status of the particular user or of the way |
| 328 in which the particular user actually uses, or expects or is expected |
| 329 to use, the product. A product is a consumer product regardless of |
| 330 whether the product has substantial commercial, industrial or |
| 331 non-consumer uses, unless such uses represent the only significant |
| 332 mode of use of the product. |
| 333 |
| 334 ``Installation Information'' for a User Product means any methods, |
| 335 procedures, authorization keys, or other information required to |
| 336 install and execute modified versions of a covered work in that User |
| 337 Product from a modified version of its Corresponding Source. The |
| 338 information must suffice to ensure that the continued functioning of |
| 339 the modified object code is in no case prevented or interfered with |
| 340 solely because modification has been made. |
| 341 |
| 342 If you convey an object code work under this section in, or with, or |
| 343 specifically for use in, a User Product, and the conveying occurs as |
| 344 part of a transaction in which the right of possession and use of the |
| 345 User Product is transferred to the recipient in perpetuity or for a |
| 346 fixed term (regardless of how the transaction is characterized), the |
| 347 Corresponding Source conveyed under this section must be accompanied |
| 348 by the Installation Information. But this requirement does not apply |
| 349 if neither you nor any third party retains the ability to install |
| 350 modified object code on the User Product (for example, the work has |
| 351 been installed in ROM). |
| 352 |
| 353 The requirement to provide Installation Information does not include a |
| 354 requirement to continue to provide support service, warranty, or |
| 355 updates for a work that has been modified or installed by the |
| 356 recipient, or for the User Product in which it has been modified or |
| 357 installed. Access to a network may be denied when the modification |
| 358 itself materially and adversely affects the operation of the network |
| 359 or violates the rules and protocols for communication across the |
| 360 network. |
| 361 |
| 362 Corresponding Source conveyed, and Installation Information provided, |
| 363 in accord with this section must be in a format that is publicly |
| 364 documented (and with an implementation available to the public in |
| 365 source code form), and must require no special password or key for |
| 366 unpacking, reading or copying. |
| 367 |
| 368 @item Additional Terms. |
| 369 |
| 370 ``Additional permissions'' are terms that supplement the terms of this |
| 371 License by making exceptions from one or more of its conditions. |
| 372 Additional permissions that are applicable to the entire Program shall |
| 373 be treated as though they were included in this License, to the extent |
| 374 that they are valid under applicable law. If additional permissions |
| 375 apply only to part of the Program, that part may be used separately |
| 376 under those permissions, but the entire Program remains governed by |
| 377 this License without regard to the additional permissions. |
| 378 |
| 379 When you convey a copy of a covered work, you may at your option |
| 380 remove any additional permissions from that copy, or from any part of |
| 381 it. (Additional permissions may be written to require their own |
| 382 removal in certain cases when you modify the work.) You may place |
| 383 additional permissions on material, added by you to a covered work, |
| 384 for which you have or can give appropriate copyright permission. |
| 385 |
| 386 Notwithstanding any other provision of this License, for material you |
| 387 add to a covered work, you may (if authorized by the copyright holders |
| 388 of that material) supplement the terms of this License with terms: |
| 389 |
| 390 @enumerate a |
| 391 @item |
| 392 Disclaiming warranty or limiting liability differently from the terms |
| 393 of sections 15 and 16 of this License; or |
| 394 |
| 395 @item |
| 396 Requiring preservation of specified reasonable legal notices or author |
| 397 attributions in that material or in the Appropriate Legal Notices |
| 398 displayed by works containing it; or |
| 399 |
| 400 @item |
| 401 Prohibiting misrepresentation of the origin of that material, or |
| 402 requiring that modified versions of such material be marked in |
| 403 reasonable ways as different from the original version; or |
| 404 |
| 405 @item |
| 406 Limiting the use for publicity purposes of names of licensors or |
| 407 authors of the material; or |
| 408 |
| 409 @item |
| 410 Declining to grant rights under trademark law for use of some trade |
| 411 names, trademarks, or service marks; or |
| 412 |
| 413 @item |
| 414 Requiring indemnification of licensors and authors of that material by |
| 415 anyone who conveys the material (or modified versions of it) with |
| 416 contractual assumptions of liability to the recipient, for any |
| 417 liability that these contractual assumptions directly impose on those |
| 418 licensors and authors. |
| 419 @end enumerate |
| 420 |
| 421 All other non-permissive additional terms are considered ``further |
| 422 restrictions'' within the meaning of section 10. If the Program as you |
| 423 received it, or any part of it, contains a notice stating that it is |
| 424 governed by this License along with a term that is a further |
| 425 restriction, you may remove that term. If a license document contains |
| 426 a further restriction but permits relicensing or conveying under this |
| 427 License, you may add to a covered work material governed by the terms |
| 428 of that license document, provided that the further restriction does |
| 429 not survive such relicensing or conveying. |
| 430 |
| 431 If you add terms to a covered work in accord with this section, you |
| 432 must place, in the relevant source files, a statement of the |
| 433 additional terms that apply to those files, or a notice indicating |
| 434 where to find the applicable terms. |
| 435 |
| 436 Additional terms, permissive or non-permissive, may be stated in the |
| 437 form of a separately written license, or stated as exceptions; the |
| 438 above requirements apply either way. |
| 439 |
| 440 @item Termination. |
| 441 |
| 442 You may not propagate or modify a covered work except as expressly |
| 443 provided under this License. Any attempt otherwise to propagate or |
| 444 modify it is void, and will automatically terminate your rights under |
| 445 this License (including any patent licenses granted under the third |
| 446 paragraph of section 11). |
| 447 |
| 448 However, if you cease all violation of this License, then your license |
| 449 from a particular copyright holder is reinstated (a) provisionally, |
| 450 unless and until the copyright holder explicitly and finally |
| 451 terminates your license, and (b) permanently, if the copyright holder |
| 452 fails to notify you of the violation by some reasonable means prior to |
| 453 60 days after the cessation. |
| 454 |
| 455 Moreover, your license from a particular copyright holder is |
| 456 reinstated permanently if the copyright holder notifies you of the |
| 457 violation by some reasonable means, this is the first time you have |
| 458 received notice of violation of this License (for any work) from that |
| 459 copyright holder, and you cure the violation prior to 30 days after |
| 460 your receipt of the notice. |
| 461 |
| 462 Termination of your rights under this section does not terminate the |
| 463 licenses of parties who have received copies or rights from you under |
| 464 this License. If your rights have been terminated and not permanently |
| 465 reinstated, you do not qualify to receive new licenses for the same |
| 466 material under section 10. |
| 467 |
| 468 @item Acceptance Not Required for Having Copies. |
| 469 |
| 470 You are not required to accept this License in order to receive or run |
| 471 a copy of the Program. Ancillary propagation of a covered work |
| 472 occurring solely as a consequence of using peer-to-peer transmission |
| 473 to receive a copy likewise does not require acceptance. However, |
| 474 nothing other than this License grants you permission to propagate or |
| 475 modify any covered work. These actions infringe copyright if you do |
| 476 not accept this License. Therefore, by modifying or propagating a |
| 477 covered work, you indicate your acceptance of this License to do so. |
| 478 |
| 479 @item Automatic Licensing of Downstream Recipients. |
| 480 |
| 481 Each time you convey a covered work, the recipient automatically |
| 482 receives a license from the original licensors, to run, modify and |
| 483 propagate that work, subject to this License. You are not responsible |
| 484 for enforcing compliance by third parties with this License. |
| 485 |
| 486 An ``entity transaction'' is a transaction transferring control of an |
| 487 organization, or substantially all assets of one, or subdividing an |
| 488 organization, or merging organizations. If propagation of a covered |
| 489 work results from an entity transaction, each party to that |
| 490 transaction who receives a copy of the work also receives whatever |
| 491 licenses to the work the party's predecessor in interest had or could |
| 492 give under the previous paragraph, plus a right to possession of the |
| 493 Corresponding Source of the work from the predecessor in interest, if |
| 494 the predecessor has it or can get it with reasonable efforts. |
| 495 |
| 496 You may not impose any further restrictions on the exercise of the |
| 497 rights granted or affirmed under this License. For example, you may |
| 498 not impose a license fee, royalty, or other charge for exercise of |
| 499 rights granted under this License, and you may not initiate litigation |
| 500 (including a cross-claim or counterclaim in a lawsuit) alleging that |
| 501 any patent claim is infringed by making, using, selling, offering for |
| 502 sale, or importing the Program or any portion of it. |
| 503 |
| 504 @item Patents. |
| 505 |
| 506 A ``contributor'' is a copyright holder who authorizes use under this |
| 507 License of the Program or a work on which the Program is based. The |
| 508 work thus licensed is called the contributor's ``contributor version''. |
| 509 |
| 510 A contributor's ``essential patent claims'' are all patent claims owned |
| 511 or controlled by the contributor, whether already acquired or |
| 512 hereafter acquired, that would be infringed by some manner, permitted |
| 513 by this License, of making, using, or selling its contributor version, |
| 514 but do not include claims that would be infringed only as a |
| 515 consequence of further modification of the contributor version. For |
| 516 purposes of this definition, ``control'' includes the right to grant |
| 517 patent sublicenses in a manner consistent with the requirements of |
| 518 this License. |
| 519 |
| 520 Each contributor grants you a non-exclusive, worldwide, royalty-free |
| 521 patent license under the contributor's essential patent claims, to |
| 522 make, use, sell, offer for sale, import and otherwise run, modify and |
| 523 propagate the contents of its contributor version. |
| 524 |
| 525 In the following three paragraphs, a ``patent license'' is any express |
| 526 agreement or commitment, however denominated, not to enforce a patent |
| 527 (such as an express permission to practice a patent or covenant not to |
| 528 sue for patent infringement). To ``grant'' such a patent license to a |
| 529 party means to make such an agreement or commitment not to enforce a |
| 530 patent against the party. |
| 531 |
| 532 If you convey a covered work, knowingly relying on a patent license, |
| 533 and the Corresponding Source of the work is not available for anyone |
| 534 to copy, free of charge and under the terms of this License, through a |
| 535 publicly available network server or other readily accessible means, |
| 536 then you must either (1) cause the Corresponding Source to be so |
| 537 available, or (2) arrange to deprive yourself of the benefit of the |
| 538 patent license for this particular work, or (3) arrange, in a manner |
| 539 consistent with the requirements of this License, to extend the patent |
| 540 license to downstream recipients. ``Knowingly relying'' means you have |
| 541 actual knowledge that, but for the patent license, your conveying the |
| 542 covered work in a country, or your recipient's use of the covered work |
| 543 in a country, would infringe one or more identifiable patents in that |
| 544 country that you have reason to believe are valid. |
| 545 |
| 546 If, pursuant to or in connection with a single transaction or |
| 547 arrangement, you convey, or propagate by procuring conveyance of, a |
| 548 covered work, and grant a patent license to some of the parties |
| 549 receiving the covered work authorizing them to use, propagate, modify |
| 550 or convey a specific copy of the covered work, then the patent license |
| 551 you grant is automatically extended to all recipients of the covered |
| 552 work and works based on it. |
| 553 |
| 554 A patent license is ``discriminatory'' if it does not include within the |
| 555 scope of its coverage, prohibits the exercise of, or is conditioned on |
| 556 the non-exercise of one or more of the rights that are specifically |
| 557 granted under this License. You may not convey a covered work if you |
| 558 are a party to an arrangement with a third party that is in the |
| 559 business of distributing software, under which you make payment to the |
| 560 third party based on the extent of your activity of conveying the |
| 561 work, and under which the third party grants, to any of the parties |
| 562 who would receive the covered work from you, a discriminatory patent |
| 563 license (a) in connection with copies of the covered work conveyed by |
| 564 you (or copies made from those copies), or (b) primarily for and in |
| 565 connection with specific products or compilations that contain the |
| 566 covered work, unless you entered into that arrangement, or that patent |
| 567 license was granted, prior to 28 March 2007. |
| 568 |
| 569 Nothing in this License shall be construed as excluding or limiting |
| 570 any implied license or other defenses to infringement that may |
| 571 otherwise be available to you under applicable patent law. |
| 572 |
| 573 @item No Surrender of Others' Freedom. |
| 574 |
| 575 If conditions are imposed on you (whether by court order, agreement or |
| 576 otherwise) that contradict the conditions of this License, they do not |
| 577 excuse you from the conditions of this License. If you cannot convey |
| 578 a covered work so as to satisfy simultaneously your obligations under |
| 579 this License and any other pertinent obligations, then as a |
| 580 consequence you may not convey it at all. For example, if you agree |
| 581 to terms that obligate you to collect a royalty for further conveying |
| 582 from those to whom you convey the Program, the only way you could |
| 583 satisfy both those terms and this License would be to refrain entirely |
| 584 from conveying the Program. |
| 585 |
| 586 @item Use with the GNU Affero General Public License. |
| 587 |
| 588 Notwithstanding any other provision of this License, you have |
| 589 permission to link or combine any covered work with a work licensed |
| 590 under version 3 of the GNU Affero General Public License into a single |
| 591 combined work, and to convey the resulting work. The terms of this |
| 592 License will continue to apply to the part which is the covered work, |
| 593 but the special requirements of the GNU Affero General Public License, |
| 594 section 13, concerning interaction through a network will apply to the |
| 595 combination as such. |
| 596 |
| 597 @item Revised Versions of this License. |
| 598 |
| 599 The Free Software Foundation may publish revised and/or new versions |
| 600 of the GNU General Public License from time to time. Such new |
| 601 versions will be similar in spirit to the present version, but may |
| 602 differ in detail to address new problems or concerns. |
| 603 |
| 604 Each version is given a distinguishing version number. If the Program |
| 605 specifies that a certain numbered version of the GNU General Public |
| 606 License ``or any later version'' applies to it, you have the option of |
| 607 following the terms and conditions either of that numbered version or |
| 608 of any later version published by the Free Software Foundation. If |
| 609 the Program does not specify a version number of the GNU General |
| 610 Public License, you may choose any version ever published by the Free |
| 611 Software Foundation. |
| 612 |
| 613 If the Program specifies that a proxy can decide which future versions |
| 614 of the GNU General Public License can be used, that proxy's public |
| 615 statement of acceptance of a version permanently authorizes you to |
| 616 choose that version for the Program. |
| 617 |
| 618 Later license versions may give you additional or different |
| 619 permissions. However, no additional obligations are imposed on any |
| 620 author or copyright holder as a result of your choosing to follow a |
| 621 later version. |
| 622 |
| 623 @item Disclaimer of Warranty. |
| 624 |
| 625 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY |
| 626 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT |
| 627 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT |
| 628 WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT |
| 629 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 630 A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND |
| 631 PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE |
| 632 DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR |
| 633 CORRECTION. |
| 634 |
| 635 @item Limitation of Liability. |
| 636 |
| 637 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
| 638 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR |
| 639 CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
| 640 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES |
| 641 ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT |
| 642 NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR |
| 643 LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM |
| 644 TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER |
| 645 PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| 646 |
| 647 @item Interpretation of Sections 15 and 16. |
| 648 |
| 649 If the disclaimer of warranty and limitation of liability provided |
| 650 above cannot be given local legal effect according to their terms, |
| 651 reviewing courts shall apply local law that most closely approximates |
| 652 an absolute waiver of all civil liability in connection with the |
| 653 Program, unless a warranty or assumption of liability accompanies a |
| 654 copy of the Program in return for a fee. |
| 655 |
| 656 @end enumerate |
| 657 |
| 658 @heading END OF TERMS AND CONDITIONS |
| 659 |
| 660 @heading How to Apply These Terms to Your New Programs |
| 661 |
| 662 If you develop a new program, and you want it to be of the greatest |
| 663 possible use to the public, the best way to achieve this is to make it |
| 664 free software which everyone can redistribute and change under these |
| 665 terms. |
| 666 |
| 667 To do so, attach the following notices to the program. It is safest |
| 668 to attach them to the start of each source file to most effectively |
| 669 state the exclusion of warranty; and each file should have at least |
| 670 the ``copyright'' line and a pointer to where the full notice is found. |
| 671 |
| 672 @smallexample |
| 673 @var{one line to give the program's name and a brief idea of what it does.} |
| 674 Copyright (C) @var{year} @var{name of author} |
| 675 |
| 676 This program is free software: you can redistribute it and/or modify |
| 677 it under the terms of the GNU General Public License as published by |
| 678 the Free Software Foundation, either version 3 of the License, or (at |
| 679 your option) any later version. |
| 680 |
| 681 This program is distributed in the hope that it will be useful, but |
| 682 WITHOUT ANY WARRANTY; without even the implied warranty of |
| 683 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 684 General Public License for more details. |
| 685 |
| 686 You should have received a copy of the GNU General Public License |
| 687 along with this program. If not, see @url{http://www.gnu.org/licenses/}. |
| 688 @end smallexample |
| 689 |
| 690 Also add information on how to contact you by electronic and paper mail. |
| 691 |
| 692 If the program does terminal interaction, make it output a short |
| 693 notice like this when it starts in an interactive mode: |
| 694 |
| 695 @smallexample |
| 696 @var{program} Copyright (C) @var{year} @var{name of author} |
| 697 This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}. |
| 698 This is free software, and you are welcome to redistribute it |
| 699 under certain conditions; type @samp{show c} for details. |
| 700 @end smallexample |
| 701 |
| 702 The hypothetical commands @samp{show w} and @samp{show c} should show |
| 703 the appropriate parts of the General Public License. Of course, your |
| 704 program's commands might be different; for a GUI interface, you would |
| 705 use an ``about box''. |
| 706 |
| 707 You should also get your employer (if you work as a programmer) or school, |
| 708 if any, to sign a ``copyright disclaimer'' for the program, if necessary. |
| 709 For more information on this, and how to apply and follow the GNU GPL, see |
| 710 @url{http://www.gnu.org/licenses/}. |
| 711 |
| 712 The GNU General Public License does not permit incorporating your |
| 713 program into proprietary programs. If your program is a subroutine |
| 714 library, you may consider it more useful to permit linking proprietary |
| 715 applications with the library. If this is what you want to do, use |
| 716 the GNU Lesser General Public License instead of this License. But |
| 717 first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}. |
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