1 GNU GENERAL PUBLIC LICENSE 2 Version 3, 29 June 2007 3 4 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/> 5 Everyone is permitted to copy and distribute verbatim copies 6 of this license document, but changing it is not allowed. 7 8 Preamble 9 10 The GNU General Public License is a free, copyleft license for 11 software and other kinds of works. 12 13 The licenses for most software and other practical works are designed 14 to take away your freedom to share and change the works. By contrast, 15 the GNU General Public License is intended to guarantee your freedom to 16 share and change all versions of a program--to make sure it remains free 17 software for all its users. We, the Free Software Foundation, use the 18 GNU General Public License for most of our software; it applies also to 19 any other work released this way by its authors. You can apply it to 20 your programs, too. 21 22 When we speak of free software, we are referring to freedom, not 23 price. Our General Public Licenses are designed to make sure that you 24 have the freedom to distribute copies of free software (and charge for 25 them if you wish), that you receive source code or can get it if you 26 want it, that you can change the software or use pieces of it in new 27 free programs, and that you know you can do these things. 28 29 To protect your rights, we need to prevent others from denying you 30 these rights or asking you to surrender the rights. Therefore, you have 31 certain responsibilities if you distribute copies of the software, or if 32 you modify it: responsibilities to respect the freedom of others. 33 34 For example, if you distribute copies of such a program, whether 35 gratis or for a fee, you must pass on to the recipients the same 36 freedoms that you received. You must make sure that they, too, receive 37 or can get the source code. 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The systematic 54 pattern of such abuse occurs in the area of products for individuals to 55 use, which is precisely where it is most unacceptable. Therefore, we 56 have designed this version of the GPL to prohibit the practice for those 57 products. If such problems arise substantially in other domains, we 58 stand ready to extend this provision to those domains in future versions 59 of the GPL, as needed to protect the freedom of users. 60 61 Finally, every program is threatened constantly by software patents. 62 States should not allow patents to restrict development and use of 63 software on general-purpose computers, but in those that do, we wish to 64 avoid the special danger that patents applied to a free program could 65 make it effectively proprietary. To prevent this, the GPL assures that 66 patents cannot be used to render the program non-free. 67 68 The precise terms and conditions for copying, distribution and 69 modification follow. 70 71 TERMS AND CONDITIONS 72 73 0. Definitions. 74 75 "This License" refers to version 3 of the GNU General Public License. 76 77 "Copyright" also means copyright-like laws that apply to other kinds of 78 works, such as semiconductor masks. 79 80 "The Program" refers to any copyrightable work licensed under this 81 License. Each licensee is addressed as "you". "Licensees" and 82 "recipients" may be individuals or organizations. 83 84 To "modify" a work means to copy from or adapt all or part of the work 85 in a fashion requiring copyright permission, other than the making of an 86 exact copy. 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If additional permissions 350 apply only to part of the Program, that part may be used separately 351 under those permissions, but the entire Program remains governed by 352 this License without regard to the additional permissions. 353 354 When you convey a copy of a covered work, you may at your option 355 remove any additional permissions from that copy, or from any part of 356 it. (Additional permissions may be written to require their own 357 removal in certain cases when you modify the work.) 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If the Program as you 390 received it, or any part of it, contains a notice stating that it is 391 governed by this License along with a term that is a further 392 restriction, you may remove that term. If a license document contains 393 a further restriction but permits relicensing or conveying under this 394 License, you may add to a covered work material governed by the terms 395 of that license document, provided that the further restriction does 396 not survive such relicensing or conveying. 397 398 If you add terms to a covered work in accord with this section, you 399 must place, in the relevant source files, a statement of the 400 additional terms that apply to those files, or a notice indicating 401 where to find the applicable terms. 402 403 Additional terms, permissive or non-permissive, may be stated in the 404 form of a separately written license, or stated as exceptions; 405 the above requirements apply either way. 406 407 8. Termination. 408 409 You may not propagate or modify a covered work except as expressly 410 provided under this License. Any attempt otherwise to propagate or 411 modify it is void, and will automatically terminate your rights under 412 this License (including any patent licenses granted under the third 413 paragraph of section 11). 414 415 However, if you cease all violation of this License, then your 416 license from a particular copyright holder is reinstated (a) 417 provisionally, unless and until the copyright holder explicitly and 418 finally terminates your license, and (b) permanently, if the copyright 419 holder fails to notify you of the violation by some reasonable means 420 prior to 60 days after the cessation. 421 422 Moreover, your license from a particular copyright holder is 423 reinstated permanently if the copyright holder notifies you of the 424 violation by some reasonable means, this is the first time you have 425 received notice of violation of this License (for any work) from that 426 copyright holder, and you cure the violation prior to 30 days after 427 your receipt of the notice. 428 429 Termination of your rights under this section does not terminate the 430 licenses of parties who have received copies or rights from you under 431 this License. If your rights have been terminated and not permanently 432 reinstated, you do not qualify to receive new licenses for the same 433 material under section 10. 434 435 9. Acceptance Not Required for Having Copies. 436 437 You are not required to accept this License in order to receive or 438 run a copy of the Program. Ancillary propagation of a covered work 439 occurring solely as a consequence of using peer-to-peer transmission 440 to receive a copy likewise does not require acceptance. However, 441 nothing other than this License grants you permission to propagate or 442 modify any covered work. These actions infringe copyright if you do 443 not accept this License. Therefore, by modifying or propagating a 444 covered work, you indicate your acceptance of this License to do so. 445 446 10. Automatic Licensing of Downstream Recipients. 447 448 Each time you convey a covered work, the recipient automatically 449 receives a license from the original licensors, to run, modify and 450 propagate that work, subject to this License. You are not responsible 451 for enforcing compliance by third parties with this License. 452 453 An "entity transaction" is a transaction transferring control of an 454 organization, or substantially all assets of one, or subdividing an 455 organization, or merging organizations. If propagation of a covered 456 work results from an entity transaction, each party to that 457 transaction who receives a copy of the work also receives whatever 458 licenses to the work the party's predecessor in interest had or could 459 give under the previous paragraph, plus a right to possession of the 460 Corresponding Source of the work from the predecessor in interest, if 461 the predecessor has it or can get it with reasonable efforts. 462 463 You may not impose any further restrictions on the exercise of the 464 rights granted or affirmed under this License. For example, you may 465 not impose a license fee, royalty, or other charge for exercise of 466 rights granted under this License, and you may not initiate litigation 467 (including a cross-claim or counterclaim in a lawsuit) alleging that 468 any patent claim is infringed by making, using, selling, offering for 469 sale, or importing the Program or any portion of it. 470 471 11. Patents. 472 473 A "contributor" is a copyright holder who authorizes use under this 474 License of the Program or a work on which the Program is based. The 475 work thus licensed is called the contributor's "contributor version". 476 477 A contributor's "essential patent claims" are all patent claims 478 owned or controlled by the contributor, whether already acquired or 479 hereafter acquired, that would be infringed by some manner, permitted 480 by this License, of making, using, or selling its contributor version, 481 but do not include claims that would be infringed only as a 482 consequence of further modification of the contributor version. For 483 purposes of this definition, "control" includes the right to grant 484 patent sublicenses in a manner consistent with the requirements of 485 this License. 486 487 Each contributor grants you a non-exclusive, worldwide, royalty-free 488 patent license under the contributor's essential patent claims, to 489 make, use, sell, offer for sale, import and otherwise run, modify and 490 propagate the contents of its contributor version. 491 492 In the following three paragraphs, a "patent license" is any express 493 agreement or commitment, however denominated, not to enforce a patent 494 (such as an express permission to practice a patent or covenant not to 495 sue for patent infringement). To "grant" such a patent license to a 496 party means to make such an agreement or commitment not to enforce a 497 patent against the party. 498 499 If you convey a covered work, knowingly relying on a patent license, 500 and the Corresponding Source of the work is not available for anyone 501 to copy, free of charge and under the terms of this License, through a 502 publicly available network server or other readily accessible means, 503 then you must either (1) cause the Corresponding Source to be so 504 available, or (2) arrange to deprive yourself of the benefit of the 505 patent license for this particular work, or (3) arrange, in a manner 506 consistent with the requirements of this License, to extend the patent 507 license to downstream recipients. "Knowingly relying" means you have 508 actual knowledge that, but for the patent license, your conveying the 509 covered work in a country, or your recipient's use of the covered work 510 in a country, would infringe one or more identifiable patents in that 511 country that you have reason to believe are valid. 512 513 If, pursuant to or in connection with a single transaction or 514 arrangement, you convey, or propagate by procuring conveyance of, a 515 covered work, and grant a patent license to some of the parties 516 receiving the covered work authorizing them to use, propagate, modify 517 or convey a specific copy of the covered work, then the patent license 518 you grant is automatically extended to all recipients of the covered 519 work and works based on it. 520 521 A patent license is "discriminatory" if it does not include within 522 the scope of its coverage, prohibits the exercise of, or is 523 conditioned on the non-exercise of one or more of the rights that are 524 specifically granted under this License. You may not convey a covered 525 work if you are a party to an arrangement with a third party that is 526 in the business of distributing software, under which you make payment 527 to the third party based on the extent of your activity of conveying 528 the work, and under which the third party grants, to any of the 529 parties who would receive the covered work from you, a discriminatory 530 patent license (a) in connection with copies of the covered work 531 conveyed by you (or copies made from those copies), or (b) primarily 532 for and in connection with specific products or compilations that 533 contain the covered work, unless you entered into that arrangement, 534 or that patent license was granted, prior to 28 March 2007. 535 536 Nothing in this License shall be construed as excluding or limiting 537 any implied license or other defenses to infringement that may 538 otherwise be available to you under applicable patent law. 539 540 12. No Surrender of Others' Freedom. 541 542 If conditions are imposed on you (whether by court order, agreement or 543 otherwise) that contradict the conditions of this License, they do not 544 excuse you from the conditions of this License. If you cannot convey a 545 covered work so as to satisfy simultaneously your obligations under this 546 License and any other pertinent obligations, then as a consequence you may 547 not convey it at all. For example, if you agree to terms that obligate you 548 to collect a royalty for further conveying from those to whom you convey 549 the Program, the only way you could satisfy both those terms and this 550 License would be to refrain entirely from conveying the Program. 551 552 13. Use with the GNU Affero General Public License. 553 554 Notwithstanding any other provision of this License, you have 555 permission to link or combine any covered work with a work licensed 556 under version 3 of the GNU Affero General Public License into a single 557 combined work, and to convey the resulting work. The terms of this 558 License will continue to apply to the part which is the covered work, 559 but the special requirements of the GNU Affero General Public License, 560 section 13, concerning interaction through a network will apply to the 561 combination as such. 562 563 14. Revised Versions of this License. 564 565 The Free Software Foundation may publish revised and/or new versions of 566 the GNU General Public License from time to time. Such new versions will 567 be similar in spirit to the present version, but may differ in detail to 568 address new problems or concerns. 569 570 Each version is given a distinguishing version number. If the 571 Program specifies that a certain numbered version of the GNU General 572 Public License "or any later version" applies to it, you have the 573 option of following the terms and conditions either of that numbered 574 version or of any later version published by the Free Software 575 Foundation. If the Program does not specify a version number of the 576 GNU General Public License, you may choose any version ever published 577 by the Free Software Foundation. 578 579 If the Program specifies that a proxy can decide which future 580 versions of the GNU General Public License can be used, that proxy's 581 public statement of acceptance of a version permanently authorizes you 582 to choose that version for the Program. 583 584 Later license versions may give you additional or different 585 permissions. However, no additional obligations are imposed on any 586 author or copyright holder as a result of your choosing to follow a 587 later version. 588 589 15. Disclaimer of Warranty. 590 591 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 600 16. Limitation of Liability. 601 602 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 SUCH DAMAGES. 611 612 17. Interpretation of Sections 15 and 16. 613 614 If the disclaimer of warranty and limitation of liability provided 615 above cannot be given local legal effect according to their terms, 616 reviewing courts shall apply local law that most closely approximates 617 an absolute waiver of all civil liability in connection with the 618 Program, unless a warranty or assumption of liability accompanies a 619 copy of the Program in return for a fee. 620 621 END OF TERMS AND CONDITIONS 622 623 How to Apply These Terms to Your New Programs 624 625 If you develop a new program, and you want it to be of the greatest 626 possible use to the public, the best way to achieve this is to make it 627 free software which everyone can redistribute and change under these terms. 628 629 To do so, attach the following notices to the program. It is safest 630 to attach them to the start of each source file to most effectively 631 state the exclusion of warranty; and each file should have at least 632 the "copyright" line and a pointer to where the full notice is found. 633 634 <one line to give the program's name and a brief idea of what it does.> 635 Copyright (C) <year> <name of author> 636 637 This program is free software: you can redistribute it and/or modify 638 it under the terms of the GNU General Public License as published by 639 the Free Software Foundation, either version 3 of the License, or 640 (at your option) any later version. 641 642 This program is distributed in the hope that it will be useful, 643 but WITHOUT ANY WARRANTY; without even the implied warranty of 644 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 GNU General Public License for more details. 646 647 You should have received a copy of the GNU General Public License 648 along with this program. If not, see <http://www.gnu.org/licenses/>. 649 650 Also add information on how to contact you by electronic and paper mail. 651 652 If the program does terminal interaction, make it output a short 653 notice like this when it starts in an interactive mode: 654 655 <program> Copyright (C) <year> <name of author> 656 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 This is free software, and you are welcome to redistribute it 658 under certain conditions; type `show c' for details. 659 660 The hypothetical commands `show w' and `show c' should show the appropriate 661 parts of the General Public License. Of course, your program's commands 662 might be different; for a GUI interface, you would use an "about box". 663 664 You should also get your employer (if you work as a programmer) or school, 665 if any, to sign a "copyright disclaimer" for the program, if necessary. 666 For more information on this, and how to apply and follow the GNU GPL, see 667 <http://www.gnu.org/licenses/>. 668 669 The GNU General Public License does not permit incorporating your program 670 into proprietary programs. If your program is a subroutine library, you 671 may consider it more useful to permit linking proprietary applications with 672 the library. If this is what you want to do, use the GNU Lesser General 673 Public License instead of this License. But first, please read 674 <http://www.gnu.org/philosophy/why-not-lgpl.html>.