1GNU GENERAL PUBLIC LICENSE 2 3Version 3, 29 June 2007 4 5Copyright © 2007 Free Software Foundation, Inc. <https://fsf.org/> 6 7Everyone is permitted to copy and distribute verbatim copies of this license 8document, but changing it is not allowed. 9 10Preamble 11 12The GNU General Public License is a free, copyleft license for software and 13other kinds of works. 14 15The licenses for most software and other practical works are designed to take 16away your freedom to share and change the works. By contrast, the GNU General 17Public License is intended to guarantee your freedom to share and change all 18versions of a program--to make sure it remains free software for all its users. 19We, the Free Software Foundation, use the GNU General Public License for most 20of our software; it applies also to any other work released this way by its 21authors. You can apply it to your programs, too. 22 23When we speak of free software, we are referring to freedom, not price. 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The systematic pattern of such abuse occurs in the 53area of products for individuals to use, which is precisely where it is most 54unacceptable. Therefore, we have designed this version of the GPL to prohibit 55the practice for those products. If such problems arise substantially in other 56domains, we stand ready to extend this provision to those domains in future 57versions of the GPL, as needed to protect the freedom of users. 58 59Finally, every program is threatened constantly by software patents. States 60should not allow patents to restrict development and use of software on general-purpose 61computers, but in those that do, we wish to avoid the special danger that 62patents applied to a free program could make it effectively proprietary. To 63prevent this, the GPL assures that patents cannot be used to render the program 64non-free. 65 66The precise terms and conditions for copying, distribution and modification 67follow. 68 69TERMS AND CONDITIONS 70 71 0. Definitions. 72 73 "This License" refers to version 3 of the GNU General Public License. 74 75"Copyright" also means copyright-like laws that apply to other kinds of works, 76such as semiconductor masks. 77 78"The Program" refers to any copyrightable work licensed under this License. 79Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals 80or organizations. 81 82To "modify" a work means to copy from or adapt all or part of the work in 83a fashion requiring copyright permission, other than the making of an exact 84copy. 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Mere interaction with a user through a computer 99network, with no transfer of a copy, is not conveying. 100 101An interactive user interface displays "Appropriate Legal Notices" to the 102extent that it includes a convenient and prominently visible feature that 103(1) displays an appropriate copyright notice, and (2) tells the user that 104there is no warranty for the work (except to the extent that warranties are 105provided), that licensees may convey the work under this License, and how 106to view a copy of this License. If the interface presents a list of user commands 107or options, such as a menu, a prominent item in the list meets this criterion. 108 109 1. Source Code. 110 111The "source code" for a work means the preferred form of the work for making 112modifications to it. 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The output from running a covered work is covered by this License 152only if the output, given its content, constitutes a covered work. This License 153acknowledges your rights of fair use or other equivalent, as provided by copyright 154law. 155 156You may make, run and propagate covered works that you do not convey, without 157conditions so long as your license otherwise remains in force. You may convey 158covered works to others for the sole purpose of having them make modifications 159exclusively for you, or provide you with facilities for running those works, 160provided that you comply with the terms of this License in conveying all material 161for which you do not control copyright. 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Conveying Verbatim Copies. 184 185You may convey verbatim copies of the Program's source code as you receive 186it, in any medium, provided that you conspicuously and appropriately publish 187on each copy an appropriate copyright notice; keep intact all notices stating 188that this License and any non-permissive terms added in accord with section 1897 apply to the code; keep intact all notices of the absence of any warranty; 190and give all recipients a copy of this License along with the Program. 191 192You may charge any price or no price for each copy that you convey, and you 193may offer support or warranty protection for a fee. 194 195 5. 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This License gives 212no permission to license the work in any other way, but it does not invalidate 213such permission if you have separately received it. 214 215d) If the work has interactive user interfaces, each must display Appropriate 216Legal Notices; however, if the Program has interactive interfaces that do 217not display Appropriate Legal Notices, your work need not make them do so. 218 219A compilation of a covered work with other separate and independent works, 220which are not by their nature extensions of the covered work, and which are 221not combined with it such as to form a larger program, in or on a volume of 222a storage or distribution medium, is called an "aggregate" if the compilation 223and its resulting copyright are not used to limit the access or legal rights 224of the compilation's users beyond what the individual works permit. 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Conveying Non-Source Forms. 229 230You may convey a covered work in object code form under the terms of sections 2314 and 5, provided that you also convey the machine-readable Corresponding 232Source under the terms of this License, in one of these ways: 233 234a) Convey the object code in, or embodied in, a physical product (including 235a physical distribution medium), accompanied by the Corresponding Source fixed 236on a durable physical medium customarily used for software interchange. 237 238b) Convey the object code in, or embodied in, a physical product (including 239a physical distribution medium), accompanied by a written offer, valid for 240at least three years and valid for as long as you offer spare parts or customer 241support for that product model, to give anyone who possesses the object code 242either (1) a copy of the Corresponding Source for all the software in the 243product that is covered by this License, on a durable physical medium customarily 244used for software interchange, for a price no more than your reasonable cost 245of physically performing this conveying of source, or (2) access to copy the 246Corresponding Source from a network server at no charge. 247 248c) Convey individual copies of the object code with a copy of the written 249offer to provide the Corresponding Source. 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For a particular product received by a particular 277user, "normally used" refers to a typical or common use of that class of product, 278regardless of the status of the particular user or of the way in which the 279particular user actually uses, or expects or is expected to use, the product. 280A product is a consumer product regardless of whether the product has substantial 281commercial, industrial or non-consumer uses, unless such uses represent the 282only significant mode of use of the product. 283 284"Installation Information" for a User Product means any methods, procedures, 285authorization keys, or other information required to install and execute modified 286versions of a covered work in that User Product from a modified version of 287its Corresponding Source. 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Access to a network may be denied 305when the modification itself materially and adversely affects the operation 306of the network or violates the rules and protocols for communication across 307the network. 308 309Corresponding Source conveyed, and Installation Information provided, in accord 310with this section must be in a format that is publicly documented (and with 311an implementation available to the public in source code form), and must require 312no special password or key for unpacking, reading or copying. 313 314 7. Additional Terms. 315 316"Additional permissions" are terms that supplement the terms of this License 317by making exceptions from one or more of its conditions. Additional permissions 318that are applicable to the entire Program shall be treated as though they 319were included in this License, to the extent that they are valid under applicable 320law. If additional permissions apply only to part of the Program, that part 321may be used separately under those permissions, but the entire Program remains 322governed by this License without regard to the additional permissions. 323 324When you convey a copy of a covered work, you may at your option remove any 325additional permissions from that copy, or from any part of it. (Additional 326permissions may be written to require their own removal in certain cases when 327you modify the work.) You may place additional permissions on material, added 328by you to a covered work, for which you have or can give appropriate copyright 329permission. 330 331Notwithstanding any other provision of this License, for material you add 332to a covered work, you may (if authorized by the copyright holders of that 333material) supplement the terms of this License with terms: 334 335a) Disclaiming warranty or limiting liability differently from the terms of 336sections 15 and 16 of this License; or 337 338b) Requiring preservation of specified reasonable legal notices or author 339attributions in that material or in the Appropriate Legal Notices displayed 340by works containing it; or 341 342c) Prohibiting misrepresentation of the origin of that material, or requiring 343that modified versions of such material be marked in reasonable ways as different 344from the original version; or 345 346d) Limiting the use for publicity purposes of names of licensors or authors 347of the material; or 348 349e) Declining to grant rights under trademark law for use of some trade names, 350trademarks, or service marks; or 351 352f) Requiring indemnification of licensors and authors of that material by 353anyone who conveys the material (or modified versions of it) with contractual 354assumptions of liability to the recipient, for any liability that these contractual 355assumptions directly impose on those licensors and authors. 356 357All other non-permissive additional terms are considered "further restrictions" 358within the meaning of section 10. If the Program as you received it, or any 359part of it, contains a notice stating that it is governed by this License 360along with a term that is a further restriction, you may remove that term. 361If a license document contains a further restriction but permits relicensing 362or conveying under this License, you may add to a covered work material governed 363by the terms of that license document, provided that the further restriction 364does not survive such relicensing or conveying. 365 366If you add terms to a covered work in accord with this section, you must place, 367in the relevant source files, a statement of the additional terms that apply 368to those files, or a notice indicating where to find the applicable terms. 369 370Additional terms, permissive or non-permissive, may be stated in the form 371of a separately written license, or stated as exceptions; the above requirements 372apply either way. 373 374 8. Termination. 375 376You may not propagate or modify a covered work except as expressly provided 377under this License. Any attempt otherwise to propagate or modify it is void, 378and will automatically terminate your rights under this License (including 379any patent licenses granted under the third paragraph of section 11). 380 381However, if you cease all violation of this License, then your license from 382a particular copyright holder is reinstated (a) provisionally, unless and 383until the copyright holder explicitly and finally terminates your license, 384and (b) permanently, if the copyright holder fails to notify you of the violation 385by some reasonable means prior to 60 days after the cessation. 386 387Moreover, your license from a particular copyright holder is reinstated permanently 388if the copyright holder notifies you of the violation by some reasonable means, 389this is the first time you have received notice of violation of this License 390(for any work) from that copyright holder, and you cure the violation prior 391to 30 days after your receipt of the notice. 392 393Termination of your rights under this section does not terminate the licenses 394of parties who have received copies or rights from you under this License. 395If your rights have been terminated and not permanently reinstated, you do 396not qualify to receive new licenses for the same material under section 10. 397 398 9. Acceptance Not Required for Having Copies. 399 400You are not required to accept this License in order to receive or run a copy 401of the Program. Ancillary propagation of a covered work occurring solely as 402a consequence of using peer-to-peer transmission to receive a copy likewise 403does not require acceptance. However, nothing other than this License grants 404you permission to propagate or modify any covered work. These actions infringe 405copyright if you do not accept this License. Therefore, by modifying or propagating 406a covered work, you indicate your acceptance of this License to do so. 407 408 10. Automatic Licensing of Downstream Recipients. 409 410Each time you convey a covered work, the recipient automatically receives 411a license from the original licensors, to run, modify and propagate that work, 412subject to this License. You are not responsible for enforcing compliance 413by third parties with this License. 414 415An "entity transaction" is a transaction transferring control of an organization, 416or substantially all assets of one, or subdividing an organization, or merging 417organizations. If propagation of a covered work results from an entity transaction, 418each party to that transaction who receives a copy of the work also receives 419whatever licenses to the work the party's predecessor in interest had or could 420give under the previous paragraph, plus a right to possession of the Corresponding 421Source of the work from the predecessor in interest, if the predecessor has 422it or can get it with reasonable efforts. 423 424You may not impose any further restrictions on the exercise of the rights 425granted or affirmed under this License. For example, you may not impose a 426license fee, royalty, or other charge for exercise of rights granted under 427this License, and you may not initiate litigation (including a cross-claim 428or counterclaim in a lawsuit) alleging that any patent claim is infringed 429by making, using, selling, offering for sale, or importing the Program or 430any portion of it. 431 432 11. Patents. 433 434A "contributor" is a copyright holder who authorizes use under this License 435of the Program or a work on which the Program is based. The work thus licensed 436is called the contributor's "contributor version". 437 438A contributor's "essential patent claims" are all patent claims owned or controlled 439by the contributor, whether already acquired or hereafter acquired, that would 440be infringed by some manner, permitted by this License, of making, using, 441or selling its contributor version, but do not include claims that would be 442infringed only as a consequence of further modification of the contributor 443version. For purposes of this definition, "control" includes the right to 444grant patent sublicenses in a manner consistent with the requirements of this 445License. 446 447Each contributor grants you a non-exclusive, worldwide, royalty-free patent 448license under the contributor's essential patent claims, to make, use, sell, 449offer for sale, import and otherwise run, modify and propagate the contents 450of its contributor version. 451 452In the following three paragraphs, a "patent license" is any express agreement 453or commitment, however denominated, not to enforce a patent (such as an express 454permission to practice a patent or covenant not to sue for patent infringement). 455To "grant" such a patent license to a party means to make such an agreement 456or commitment not to enforce a patent against the party. 457 458If you convey a covered work, knowingly relying on a patent license, and the 459Corresponding Source of the work is not available for anyone to copy, free 460of charge and under the terms of this License, through a publicly available 461network server or other readily accessible means, then you must either (1) 462cause the Corresponding Source to be so available, or (2) arrange to deprive 463yourself of the benefit of the patent license for this particular work, or 464(3) arrange, in a manner consistent with the requirements of this License, 465to extend the patent license to downstream recipients. "Knowingly relying" 466means you have actual knowledge that, but for the patent license, your conveying 467the covered work in a country, or your recipient's use of the covered work 468in a country, would infringe one or more identifiable patents in that country 469that you have reason to believe are valid. 470 471If, pursuant to or in connection with a single transaction or arrangement, 472you convey, or propagate by procuring conveyance of, a covered work, and grant 473a patent license to some of the parties receiving the covered work authorizing 474them to use, propagate, modify or convey a specific copy of the covered work, 475then the patent license you grant is automatically extended to all recipients 476of the covered work and works based on it. 477 478A patent license is "discriminatory" if it does not include within the scope 479of its coverage, prohibits the exercise of, or is conditioned on the non-exercise 480of one or more of the rights that are specifically granted under this License. 481You may not convey a covered work if you are a party to an arrangement with 482a third party that is in the business of distributing software, under which 483you make payment to the third party based on the extent of your activity of 484conveying the work, and under which the third party grants, to any of the 485parties who would receive the covered work from you, a discriminatory patent 486license (a) in connection with copies of the covered work conveyed by you 487(or copies made from those copies), or (b) primarily for and in connection 488with specific products or compilations that contain the covered work, unless 489you entered into that arrangement, or that patent license was granted, prior 490to 28 March 2007. 491 492Nothing in this License shall be construed as excluding or limiting any implied 493license or other defenses to infringement that may otherwise be available 494to you under applicable patent law. 495 496 12. No Surrender of Others' Freedom. 497 498If conditions are imposed on you (whether by court order, agreement or otherwise) 499that contradict the conditions of this License, they do not excuse you from 500the conditions of this License. If you cannot convey a covered work so as 501to satisfy simultaneously your obligations under this License and any other 502pertinent obligations, then as a consequence you may not convey it at all. 503For example, if you agree to terms that obligate you to collect a royalty 504for further conveying from those to whom you convey the Program, the only 505way you could satisfy both those terms and this License would be to refrain 506entirely from conveying the Program. 507 508 13. Use with the GNU Affero General Public License. 509 510Notwithstanding any other provision of this License, you have permission to 511link or combine any covered work with a work licensed under version 3 of the 512GNU Affero General Public License into a single combined work, and to convey 513the resulting work. The terms of this License will continue to apply to the 514part which is the covered work, but the special requirements of the GNU Affero 515General Public License, section 13, concerning interaction through a network 516will apply to the combination as such. 517 518 14. Revised Versions of this License. 519 520The Free Software Foundation may publish revised and/or new versions of the 521GNU General Public License from time to time. Such new versions will be similar 522in spirit to the present version, but may differ in detail to address new 523problems or concerns. 524 525Each version is given a distinguishing version number. If the Program specifies 526that a certain numbered version of the GNU General Public License "or any 527later version" applies to it, you have the option of following the terms and 528conditions either of that numbered version or of any later version published 529by the Free Software Foundation. If the Program does not specify a version 530number of the GNU General Public License, you may choose any version ever 531published by the Free Software Foundation. 532 533If the Program specifies that a proxy can decide which future versions of 534the GNU General Public License can be used, that proxy's public statement 535of acceptance of a version permanently authorizes you to choose that version 536for the Program. 537 538Later license versions may give you additional or different permissions. However, 539no additional obligations are imposed on any author or copyright holder as 540a result of your choosing to follow a later version. 541 542 15. Disclaimer of Warranty. 543 544THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE 545LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 546OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER 547EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 548OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 549TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM 550PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR 551CORRECTION. 552 553 16. Limitation of Liability. 554 555IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL 556ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM 557AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, 558INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO 559USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 560INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE 561PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER 562PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 563 564 17. Interpretation of Sections 15 and 16. 565 566If the disclaimer of warranty and limitation of liability provided above cannot 567be given local legal effect according to their terms, reviewing courts shall 568apply local law that most closely approximates an absolute waiver of all civil 569liability in connection with the Program, unless a warranty or assumption 570of liability accompanies a copy of the Program in return for a fee. END OF 571TERMS AND CONDITIONS 572 573How to Apply These Terms to Your New Programs 574 575If you develop a new program, and you want it to be of the greatest possible 576use to the public, the best way to achieve this is to make it free software 577which everyone can redistribute and change under these terms. 578 579To do so, attach the following notices to the program. It is safest to attach 580them to the start of each source file to most effectively state the exclusion 581of warranty; and each file should have at least the "copyright" line and a 582pointer to where the full notice is found. 583 584<one line to give the program's name and a brief idea of what it does.> 585 586Copyright (C) <year> <name of author> 587 588This program is free software: you can redistribute it and/or modify it under 589the terms of the GNU General Public License as published by the Free Software 590Foundation, either version 3 of the License, or (at your option) any later 591version. 592 593This program is distributed in the hope that it will be useful, but WITHOUT 594ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 595FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. 596 597You should have received a copy of the GNU General Public License along with 598this program. If not, see <https://www.gnu.org/licenses/>. 599 600Also add information on how to contact you by electronic and paper mail. 601 602If the program does terminal interaction, make it output a short notice like 603this when it starts in an interactive mode: 604 605<program> Copyright (C) <year> <name of author> 606 607This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 608 609This is free software, and you are welcome to redistribute it under certain 610conditions; type `show c' for details. 611 612The hypothetical commands `show w' and `show c' should show the appropriate 613parts of the General Public License. Of course, your program's commands might 614be different; for a GUI interface, you would use an "about box". 615 616You should also get your employer (if you work as a programmer) or school, 617if any, to sign a "copyright disclaimer" for the program, if necessary. For 618more information on this, and how to apply and follow the GNU GPL, see <https://www.gnu.org/licenses/>. 619 620The GNU General Public License does not permit incorporating your program 621into proprietary programs. If your program is a subroutine library, you may 622consider it more useful to permit linking proprietary applications with the 623library. If this is what you want to do, use the GNU Lesser General Public 624License instead of this License. But first, please read <https://www.gnu.org/ 625licenses /why-not-lgpl.html>. 626