1 2 GNU GENERAL PUBLIC LICENSE 3 Version 3, 29 June 2007 4 5 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> 6 Everyone is permitted to copy and distribute verbatim copies 7 of this license document, but changing it is not allowed. 8 9 Preamble 10 11 The GNU General Public License is a free, copyleft license for 12software and other kinds of works. 13 14 The licenses for most software and other practical works are designed 15to take away your freedom to share and change the works. By contrast, 16the GNU General Public License is intended to guarantee your freedom to 17share and change all versions of a program--to make sure it remains free 18software for all its users. We, the Free Software Foundation, use the 19GNU General Public License for most of our software; it applies also to 20any other work released this way by its authors. You can apply it to 21your programs, too. 22 23 When we speak of free software, we are referring to freedom, not 24price. 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Definitions. 75 76 "This License" refers to version 3 of the GNU General Public License. 77 78 "Copyright" also means copyright-like laws that apply to other kinds of 79works, such as semiconductor masks. 80 81 "The Program" refers to any copyrightable work licensed under this 82License. Each licensee is addressed as "you". "Licensees" and 83"recipients" may be individuals or organizations. 84 85 To "modify" a work means to copy from or adapt all or part of the work 86in a fashion requiring copyright permission, other than the making of an 87exact copy. 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Any attempt otherwise to propagate or 412modify it is void, and will automatically terminate your rights under 413this License (including any patent licenses granted under the third 414paragraph of section 11). 415 416 However, if you cease all violation of this License, then your 417license from a particular copyright holder is reinstated (a) 418provisionally, unless and until the copyright holder explicitly and 419finally terminates your license, and (b) permanently, if the copyright 420holder fails to notify you of the violation by some reasonable means 421prior to 60 days after the cessation. 422 423 Moreover, your license from a particular copyright holder is 424reinstated permanently if the copyright holder notifies you of the 425violation by some reasonable means, this is the first time you have 426received notice of violation of this License (for any work) from that 427copyright holder, and you cure the violation prior to 30 days after 428your receipt of the notice. 429 430 Termination of your rights under this section does not terminate the 431licenses of parties who have received copies or rights from you under 432this License. If your rights have been terminated and not permanently 433reinstated, you do not qualify to receive new licenses for the same 434material under section 10. 435 436 9. Acceptance Not Required for Having Copies. 437 438 You are not required to accept this License in order to receive or 439run a copy of the Program. Ancillary propagation of a covered work 440occurring solely as a consequence of using peer-to-peer transmission 441to receive a copy likewise does not require acceptance. However, 442nothing other than this License grants you permission to propagate or 443modify any covered work. These actions infringe copyright if you do 444not accept this License. Therefore, by modifying or propagating a 445covered work, you indicate your acceptance of this License to do so. 446 447 10. Automatic Licensing of Downstream Recipients. 448 449 Each time you convey a covered work, the recipient automatically 450receives a license from the original licensors, to run, modify and 451propagate that work, subject to this License. You are not responsible 452for enforcing compliance by third parties with this License. 453 454 An "entity transaction" is a transaction transferring control of an 455organization, or substantially all assets of one, or subdividing an 456organization, or merging organizations. If propagation of a covered 457work results from an entity transaction, each party to that 458transaction who receives a copy of the work also receives whatever 459licenses to the work the party's predecessor in interest had or could 460give under the previous paragraph, plus a right to possession of the 461Corresponding Source of the work from the predecessor in interest, if 462the predecessor has it or can get it with reasonable efforts. 463 464 You may not impose any further restrictions on the exercise of the 465rights granted or affirmed under this License. For example, you may 466not impose a license fee, royalty, or other charge for exercise of 467rights granted under this License, and you may not initiate litigation 468(including a cross-claim or counterclaim in a lawsuit) alleging that 469any patent claim is infringed by making, using, selling, offering for 470sale, or importing the Program or any portion of it. 471 472 11. Patents. 473 474 A "contributor" is a copyright holder who authorizes use under this 475License of the Program or a work on which the Program is based. The 476work thus licensed is called the contributor's "contributor version". 477 478 A contributor's "essential patent claims" are all patent claims 479owned or controlled by the contributor, whether already acquired or 480hereafter acquired, that would be infringed by some manner, permitted 481by this License, of making, using, or selling its contributor version, 482but do not include claims that would be infringed only as a 483consequence of further modification of the contributor version. For 484purposes of this definition, "control" includes the right to grant 485patent sublicenses in a manner consistent with the requirements of 486this License. 487 488 Each contributor grants you a non-exclusive, worldwide, royalty-free 489patent license under the contributor's essential patent claims, to 490make, use, sell, offer for sale, import and otherwise run, modify and 491propagate the contents of its contributor version. 492 493 In the following three paragraphs, a "patent license" is any express 494agreement or commitment, however denominated, not to enforce a patent 495(such as an express permission to practice a patent or covenant not to 496sue for patent infringement). To "grant" such a patent license to a 497party means to make such an agreement or commitment not to enforce a 498patent against the party. 499 500 If you convey a covered work, knowingly relying on a patent license, 501and the Corresponding Source of the work is not available for anyone 502to copy, free of charge and under the terms of this License, through a 503publicly available network server or other readily accessible means, 504then you must either (1) cause the Corresponding Source to be so 505available, or (2) arrange to deprive yourself of the benefit of the 506patent license for this particular work, or (3) arrange, in a manner 507consistent with the requirements of this License, to extend the patent 508license to downstream recipients. "Knowingly relying" means you have 509actual knowledge that, but for the patent license, your conveying the 510covered work in a country, or your recipient's use of the covered work 511in a country, would infringe one or more identifiable patents in that 512country that you have reason to believe are valid. 513 514 If, pursuant to or in connection with a single transaction or 515arrangement, you convey, or propagate by procuring conveyance of, a 516covered work, and grant a patent license to some of the parties 517receiving the covered work authorizing them to use, propagate, modify 518or convey a specific copy of the covered work, then the patent license 519you grant is automatically extended to all recipients of the covered 520work and works based on it. 521 522 A patent license is "discriminatory" if it does not include within 523the scope of its coverage, prohibits the exercise of, or is 524conditioned on the non-exercise of one or more of the rights that are 525specifically granted under this License. You may not convey a covered 526work if you are a party to an arrangement with a third party that is 527in the business of distributing software, under which you make payment 528to the third party based on the extent of your activity of conveying 529the work, and under which the third party grants, to any of the 530parties who would receive the covered work from you, a discriminatory 531patent license (a) in connection with copies of the covered work 532conveyed by you (or copies made from those copies), or (b) primarily 533for and in connection with specific products or compilations that 534contain the covered work, unless you entered into that arrangement, 535or that patent license was granted, prior to 28 March 2007. 536 537 Nothing in this License shall be construed as excluding or limiting 538any implied license or other defenses to infringement that may 539otherwise be available to you under applicable patent law. 540 541 12. No Surrender of Others' Freedom. 542 543 If conditions are imposed on you (whether by court order, agreement or 544otherwise) that contradict the conditions of this License, they do not 545excuse you from the conditions of this License. If you cannot convey a 546covered work so as to satisfy simultaneously your obligations under this 547License and any other pertinent obligations, then as a consequence you may 548not convey it at all. For example, if you agree to terms that obligate you 549to collect a royalty for further conveying from those to whom you convey 550the Program, the only way you could satisfy both those terms and this 551License would be to refrain entirely from conveying the Program. 552 553 13. Use with the GNU Affero General Public License. 554 555 Notwithstanding any other provision of this License, you have 556permission to link or combine any covered work with a work licensed 557under version 3 of the GNU Affero General Public License into a single 558combined work, and to convey the resulting work. The terms of this 559License will continue to apply to the part which is the covered work, 560but the special requirements of the GNU Affero General Public License, 561section 13, concerning interaction through a network will apply to the 562combination as such. 563 564 14. Revised Versions of this License. 565 566 The Free Software Foundation may publish revised and/or new versions of 567the GNU General Public License from time to time. Such new versions will 568be similar in spirit to the present version, but may differ in detail to 569address new problems or concerns. 570 571 Each version is given a distinguishing version number. If the 572Program specifies that a certain numbered version of the GNU General 573Public License "or any later version" applies to it, you have the 574option of following the terms and conditions either of that numbered 575version or of any later version published by the Free Software 576Foundation. If the Program does not specify a version number of the 577GNU General Public License, you may choose any version ever published 578by the Free Software Foundation. 579 580 If the Program specifies that a proxy can decide which future 581versions of the GNU General Public License can be used, that proxy's 582public statement of acceptance of a version permanently authorizes you 583to choose that version for the Program. 584 585 Later license versions may give you additional or different 586permissions. However, no additional obligations are imposed on any 587author or copyright holder as a result of your choosing to follow a 588later version. 589 590 15. Disclaimer of Warranty. 591 592 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 593APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 594HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 595OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 596THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 597PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 598IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 599ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 600 601 16. Limitation of Liability. 602 603 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 604WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 605THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 606GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 607USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 608DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 609PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 610EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 611SUCH DAMAGES. 612 613 17. Interpretation of Sections 15 and 16. 614 615 If the disclaimer of warranty and limitation of liability provided 616above cannot be given local legal effect according to their terms, 617reviewing courts shall apply local law that most closely approximates 618an absolute waiver of all civil liability in connection with the 619Program, unless a warranty or assumption of liability accompanies a 620copy of the Program in return for a fee. 621 622 END OF TERMS AND CONDITIONS 623 624 How to Apply These Terms to Your New Programs 625 626 If you develop a new program, and you want it to be of the greatest 627possible use to the public, the best way to achieve this is to make it 628free software which everyone can redistribute and change under these terms. 629 630 To do so, attach the following notices to the program. It is safest 631to attach them to the start of each source file to most effectively 632state the exclusion of warranty; and each file should have at least 633the "copyright" line and a pointer to where the full notice is found. 634 635 <one line to give the program's name and a brief idea of what it does.> 636 Copyright (C) <year> <name of author> 637 638 This program is free software: you can redistribute it and/or modify 639 it under the terms of the GNU General Public License as published by 640 the Free Software Foundation, either version 3 of the License, or 641 (at your option) any later version. 642 643 This program is distributed in the hope that it will be useful, 644 but WITHOUT ANY WARRANTY; without even the implied warranty of 645 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 646 GNU General Public License for more details. 647 648 You should have received a copy of the GNU General Public License 649 along with this program. If not, see <http://www.gnu.org/licenses/>. 650 651Also add information on how to contact you by electronic and paper mail. 652 653 If the program does terminal interaction, make it output a short 654notice like this when it starts in an interactive mode: 655 656 <program> Copyright (C) <year> <name of author> 657 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 658 This is free software, and you are welcome to redistribute it 659 under certain conditions; type `show c' for details. 660 661The hypothetical commands `show w' and `show c' should show the appropriate 662parts of the General Public License. Of course, your program's commands 663might be different; for a GUI interface, you would use an "about box". 664 665 You should also get your employer (if you work as a programmer) or school, 666if any, to sign a "copyright disclaimer" for the program, if necessary. 667For more information on this, and how to apply and follow the GNU GPL, see 668<http://www.gnu.org/licenses/>. 669 670 The GNU General Public License does not permit incorporating your program 671into proprietary programs. If your program is a subroutine library, you 672may consider it more useful to permit linking proprietary applications with 673the library. If this is what you want to do, use the GNU Lesser General 674Public License instead of this License. But first, please read 675<http://www.gnu.org/philosophy/why-not-lgpl.html>. 676 677