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