| 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}. |