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 12 software and other kinds of works. 13 14 The licenses for most software and other practical works are designed 15 to take away your freedom to share and change the works. By contrast, 16 the GNU General Public License is intended to guarantee your freedom to 17 share and change all versions of a program--to make sure it remains free 18 software for all its users. We, the Free Software Foundation, use the 19 GNU General Public License for most of our software; it applies also to 20 any other work released this way by its authors. You can apply it to 21 your programs, too. 22 23 When we speak of free software, we are referring to freedom, not 24 price. Our General Public Licenses are designed to make sure that you 25 have the freedom to distribute copies of free software (and charge for 26 them if you wish), that you receive source code or can get it if you 27 want it, that you can change the software or use pieces of it in new 28 free programs, and that you know you can do these things. 29 30 To protect your rights, we need to prevent others from denying you 31 these rights or asking you to surrender the rights. Therefore, you have 32 certain responsibilities if you distribute copies of the software, or if 33 you modify it: responsibilities to respect the freedom of others. 34 35 For example, if you distribute copies of such a program, whether 36 gratis or for a fee, you must pass on to the recipients the same 37 freedoms that you received. You must make sure that they, too, receive 38 or can get the source code. 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The systematic 55 pattern of such abuse occurs in the area of products for individuals to 56 use, which is precisely where it is most unacceptable. Therefore, we 57 have designed this version of the GPL to prohibit the practice for those 58 products. If such problems arise substantially in other domains, we 59 stand ready to extend this provision to those domains in future versions 60 of the GPL, as needed to protect the freedom of users. 61 62 Finally, every program is threatened constantly by software patents. 63 States should not allow patents to restrict development and use of 64 software on general-purpose computers, but in those that do, we wish to 65 avoid the special danger that patents applied to a free program could 66 make it effectively proprietary. To prevent this, the GPL assures that 67 patents cannot be used to render the program non-free. 68 69 The precise terms and conditions for copying, distribution and 70 modification follow. 71 72 TERMS AND CONDITIONS 73 74 0. 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 79 works, such as semiconductor masks. 80 81 "The Program" refers to any copyrightable work licensed under this 82 License. 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 86 in a fashion requiring copyright permission, other than the making of an 87 exact copy. 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If additional permissions 351 apply only to part of the Program, that part may be used separately 352 under those permissions, but the entire Program remains governed by 353 this License without regard to the additional permissions. 354 355 When you convey a copy of a covered work, you may at your option 356 remove any additional permissions from that copy, or from any part of 357 it. (Additional permissions may be written to require their own 358 removal in certain cases when you modify the work.) 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If the Program as you 391 received it, or any part of it, contains a notice stating that it is 392 governed by this License along with a term that is a further 393 restriction, you may remove that term. If a license document contains 394 a further restriction but permits relicensing or conveying under this 395 License, you may add to a covered work material governed by the terms 396 of that license document, provided that the further restriction does 397 not survive such relicensing or conveying. 398 399 If you add terms to a covered work in accord with this section, you 400 must place, in the relevant source files, a statement of the 401 additional terms that apply to those files, or a notice indicating 402 where to find the applicable terms. 403 404 Additional terms, permissive or non-permissive, may be stated in the 405 form of a separately written license, or stated as exceptions; 406 the above requirements apply either way. 407 408 8. Termination. 409 410 You may not propagate or modify a covered work except as expressly 411 provided under this License. Any attempt otherwise to propagate or 412 modify it is void, and will automatically terminate your rights under 413 this License (including any patent licenses granted under the third 414 paragraph of section 11). 415 416 However, if you cease all violation of this License, then your 417 license from a particular copyright holder is reinstated (a) 418 provisionally, unless and until the copyright holder explicitly and 419 finally terminates your license, and (b) permanently, if the copyright 420 holder fails to notify you of the violation by some reasonable means 421 prior to 60 days after the cessation. 422 423 Moreover, your license from a particular copyright holder is 424 reinstated permanently if the copyright holder notifies you of the 425 violation by some reasonable means, this is the first time you have 426 received notice of violation of this License (for any work) from that 427 copyright holder, and you cure the violation prior to 30 days after 428 your receipt of the notice. 429 430 Termination of your rights under this section does not terminate the 431 licenses of parties who have received copies or rights from you under 432 this License. If your rights have been terminated and not permanently 433 reinstated, you do not qualify to receive new licenses for the same 434 material 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 439 run a copy of the Program. Ancillary propagation of a covered work 440 occurring solely as a consequence of using peer-to-peer transmission 441 to receive a copy likewise does not require acceptance. However, 442 nothing other than this License grants you permission to propagate or 443 modify any covered work. These actions infringe copyright if you do 444 not accept this License. Therefore, by modifying or propagating a 445 covered 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 450 receives a license from the original licensors, to run, modify and 451 propagate that work, subject to this License. You are not responsible 452 for enforcing compliance by third parties with this License. 453 454 An "entity transaction" is a transaction transferring control of an 455 organization, or substantially all assets of one, or subdividing an 456 organization, or merging organizations. If propagation of a covered 457 work results from an entity transaction, each party to that 458 transaction who receives a copy of the work also receives whatever 459 licenses to the work the party's predecessor in interest had or could 460 give under the previous paragraph, plus a right to possession of the 461 Corresponding Source of the work from the predecessor in interest, if 462 the predecessor has it or can get it with reasonable efforts. 463 464 You may not impose any further restrictions on the exercise of the 465 rights granted or affirmed under this License. For example, you may 466 not impose a license fee, royalty, or other charge for exercise of 467 rights granted under this License, and you may not initiate litigation 468 (including a cross-claim or counterclaim in a lawsuit) alleging that 469 any patent claim is infringed by making, using, selling, offering for 470 sale, 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 475 License of the Program or a work on which the Program is based. The 476 work thus licensed is called the contributor's "contributor version". 477 478 A contributor's "essential patent claims" are all patent claims 479 owned or controlled by the contributor, whether already acquired or 480 hereafter acquired, that would be infringed by some manner, permitted 481 by this License, of making, using, or selling its contributor version, 482 but do not include claims that would be infringed only as a 483 consequence of further modification of the contributor version. For 484 purposes of this definition, "control" includes the right to grant 485 patent sublicenses in a manner consistent with the requirements of 486 this License. 487 488 Each contributor grants you a non-exclusive, worldwide, royalty-free 489 patent license under the contributor's essential patent claims, to 490 make, use, sell, offer for sale, import and otherwise run, modify and 491 propagate the contents of its contributor version. 492 493 In the following three paragraphs, a "patent license" is any express 494 agreement or commitment, however denominated, not to enforce a patent 495 (such as an express permission to practice a patent or covenant not to 496 sue for patent infringement). To "grant" such a patent license to a 497 party means to make such an agreement or commitment not to enforce a 498 patent against the party. 499 500 If you convey a covered work, knowingly relying on a patent license, 501 and the Corresponding Source of the work is not available for anyone 502 to copy, free of charge and under the terms of this License, through a 503 publicly available network server or other readily accessible means, 504 then you must either (1) cause the Corresponding Source to be so 505 available, or (2) arrange to deprive yourself of the benefit of the 506 patent license for this particular work, or (3) arrange, in a manner 507 consistent with the requirements of this License, to extend the patent 508 license to downstream recipients. "Knowingly relying" means you have 509 actual knowledge that, but for the patent license, your conveying the 510 covered work in a country, or your recipient's use of the covered work 511 in a country, would infringe one or more identifiable patents in that 512 country that you have reason to believe are valid. 513 514 If, pursuant to or in connection with a single transaction or 515 arrangement, you convey, or propagate by procuring conveyance of, a 516 covered work, and grant a patent license to some of the parties 517 receiving the covered work authorizing them to use, propagate, modify 518 or convey a specific copy of the covered work, then the patent license 519 you grant is automatically extended to all recipients of the covered 520 work and works based on it. 521 522 A patent license is "discriminatory" if it does not include within 523 the scope of its coverage, prohibits the exercise of, or is 524 conditioned on the non-exercise of one or more of the rights that are 525 specifically granted under this License. You may not convey a covered 526 work if you are a party to an arrangement with a third party that is 527 in the business of distributing software, under which you make payment 528 to the third party based on the extent of your activity of conveying 529 the work, and under which the third party grants, to any of the 530 parties who would receive the covered work from you, a discriminatory 531 patent license (a) in connection with copies of the covered work 532 conveyed by you (or copies made from those copies), or (b) primarily 533 for and in connection with specific products or compilations that 534 contain the covered work, unless you entered into that arrangement, 535 or that patent license was granted, prior to 28 March 2007. 536 537 Nothing in this License shall be construed as excluding or limiting 538 any implied license or other defenses to infringement that may 539 otherwise 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 544 otherwise) that contradict the conditions of this License, they do not 545 excuse you from the conditions of this License. If you cannot convey a 546 covered work so as to satisfy simultaneously your obligations under this 547 License and any other pertinent obligations, then as a consequence you may 548 not convey it at all. For example, if you agree to terms that obligate you 549 to collect a royalty for further conveying from those to whom you convey 550 the Program, the only way you could satisfy both those terms and this 551 License 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 556 permission to link or combine any covered work with a work licensed 557 under version 3 of the GNU Affero General Public License into a single 558 combined work, and to convey the resulting work. The terms of this 559 License will continue to apply to the part which is the covered work, 560 but the special requirements of the GNU Affero General Public License, 561 section 13, concerning interaction through a network will apply to the 562 combination as such. 563 564 14. Revised Versions of this License. 565 566 The Free Software Foundation may publish revised and/or new versions of 567 the GNU General Public License from time to time. Such new versions will 568 be similar in spirit to the present version, but may differ in detail to 569 address new problems or concerns. 570 571 Each version is given a distinguishing version number. If the 572 Program specifies that a certain numbered version of the GNU General 573 Public License "or any later version" applies to it, you have the 574 option of following the terms and conditions either of that numbered 575 version or of any later version published by the Free Software 576 Foundation. If the Program does not specify a version number of the 577 GNU General Public License, you may choose any version ever published 578 by the Free Software Foundation. 579 580 If the Program specifies that a proxy can decide which future 581 versions of the GNU General Public License can be used, that proxy's 582 public statement of acceptance of a version permanently authorizes you 583 to choose that version for the Program. 584 585 Later license versions may give you additional or different 586 permissions. However, no additional obligations are imposed on any 587 author or copyright holder as a result of your choosing to follow a 588 later version. 589 590 15. Disclaimer of Warranty. 591 592 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 593 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 594 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 595 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 596 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 597 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 598 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 599 ALL 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 604 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 605 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 606 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 607 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 608 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 609 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 610 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 611 SUCH DAMAGES. 612 613 17. Interpretation of Sections 15 and 16. 614 615 If the disclaimer of warranty and limitation of liability provided 616 above cannot be given local legal effect according to their terms, 617 reviewing courts shall apply local law that most closely approximates 618 an absolute waiver of all civil liability in connection with the 619 Program, unless a warranty or assumption of liability accompanies a 620 copy 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 627 possible use to the public, the best way to achieve this is to make it 628 free 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 631 to attach them to the start of each source file to most effectively 632 state the exclusion of warranty; and each file should have at least 633 the "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/>. 650 651 Also 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 654 notice 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. 660 661 The hypothetical commands `show w' and `show c' should show the appropriate 662 parts of the General Public License. Of course, your program's commands 663 might 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, 666 if any, to sign a "copyright disclaimer" for the program, if necessary. 667 For 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 671 into proprietary programs. If your program is a subroutine library, you 672 may consider it more useful to permit linking proprietary applications with 673 the library. If this is what you want to do, use the GNU Lesser General 674 Public License instead of this License. But first, please read 675 <http://www.gnu.org/philosophy/why-not-lgpl.html>.