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1 GNU AFFERO GENERAL PUBLIC LICENSE 2 Version 3, 19 November 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 Affero General Public License is a free, copyleft license for 11software and other kinds of works, specifically designed to ensure 12cooperation with the community in the case of network server software. 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, 16our General Public Licenses are 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. 19 20 When we speak of free software, we are referring to freedom, not 21price. Our General Public Licenses are designed to make sure that you 22have the freedom to distribute copies of free software (and charge for 23them if you wish), that you receive source code or can get it if you 24want it, that you can change the software or use pieces of it in new 25free programs, and that you know you can do these things. 26 27 Developers that use our General Public Licenses protect your rights 28with two steps: (1) assert copyright on the software, and (2) offer 29you this License which gives you legal permission to copy, distribute 30and/or modify the software. 31 32 A secondary benefit of defending all users' freedom is that 33improvements made in alternate versions of the program, if they 34receive widespread use, become available for other developers to 35incorporate. Many developers of free software are heartened and 36encouraged by the resulting cooperation. However, in the case of 37software used on network servers, this result may fail to come about. 38The GNU General Public License permits making a modified version and 39letting the public access it on a server without ever releasing its 40source code to the public. 41 42 The GNU Affero General Public License is designed specifically to 43ensure that, in such cases, the modified source code becomes available 44to the community. It requires the operator of a network server to 45provide the source code of the modified version running there to the 46users of that server. Therefore, public use of a modified version, on 47a publicly accessible server, gives the public access to the source 48code of the modified version. 49 50 An older license, called the Affero General Public License and 51published by Affero, was designed to accomplish similar goals. This is 52a different license, not a version of the Affero GPL, but Affero has 53released a new version of the Affero GPL which permits relicensing under 54this license. 55 56 The precise terms and conditions for copying, distribution and 57modification follow. 58 59 TERMS AND CONDITIONS 60 61 0. Definitions. 62 63 "This License" refers to version 3 of the GNU Affero General Public License. 64 65 "Copyright" also means copyright-like laws that apply to other kinds of 66works, such as semiconductor masks. 67 68 "The Program" refers to any copyrightable work licensed under this 69License. Each licensee is addressed as "you". "Licensees" and 70"recipients" may be individuals or organizations. 71 72 To "modify" a work means to copy from or adapt all or part of the work 73in a fashion requiring copyright permission, other than the making of an 74exact copy. The resulting work is called a "modified version" of the 75earlier work or a work "based on" the earlier work. 76 77 A "covered work" means either the unmodified Program or a work based 78on the Program. 79 80 To "propagate" a work means to do anything with it that, without 81permission, would make you directly or secondarily liable for 82infringement under applicable copyright law, except executing it on a 83computer or modifying a private copy. Propagation includes copying, 84distribution (with or without modification), making available to the 85public, and in some countries other activities as well. 86 87 To "convey" a work means any kind of propagation that enables other 88parties to make or receive copies. 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Automatic Licensing of Downstream Recipients. 435 436 Each time you convey a covered work, the recipient automatically 437receives a license from the original licensors, to run, modify and 438propagate that work, subject to this License. You are not responsible 439for enforcing compliance by third parties with this License. 440 441 An "entity transaction" is a transaction transferring control of an 442organization, or substantially all assets of one, or subdividing an 443organization, or merging organizations. If propagation of a covered 444work results from an entity transaction, each party to that 445transaction who receives a copy of the work also receives whatever 446licenses to the work the party's predecessor in interest had or could 447give under the previous paragraph, plus a right to possession of the 448Corresponding Source of the work from the predecessor in interest, if 449the predecessor has it or can get it with reasonable efforts. 450 451 You may not impose any further restrictions on the exercise of the 452rights granted or affirmed under this License. For example, you may 453not impose a license fee, royalty, or other charge for exercise of 454rights granted under this License, and you may not initiate litigation 455(including a cross-claim or counterclaim in a lawsuit) alleging that 456any patent claim is infringed by making, using, selling, offering for 457sale, or importing the Program or any portion of it. 458 459 11. Patents. 460 461 A "contributor" is a copyright holder who authorizes use under this 462License of the Program or a work on which the Program is based. The 463work thus licensed is called the contributor's "contributor version". 464 465 A contributor's "essential patent claims" are all patent claims 466owned or controlled by the contributor, whether already acquired or 467hereafter acquired, that would be infringed by some manner, permitted 468by this License, of making, using, or selling its contributor version, 469but do not include claims that would be infringed only as a 470consequence of further modification of the contributor version. For 471purposes of this definition, "control" includes the right to grant 472patent sublicenses in a manner consistent with the requirements of 473this License. 474 475 Each contributor grants you a non-exclusive, worldwide, royalty-free 476patent license under the contributor's essential patent claims, to 477make, use, sell, offer for sale, import and otherwise run, modify and 478propagate the contents of its contributor version. 479 480 In the following three paragraphs, a "patent license" is any express 481agreement or commitment, however denominated, not to enforce a patent 482(such as an express permission to practice a patent or covenant not to 483sue for patent infringement). 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"Knowingly relying" means you have 496actual knowledge that, but for the patent license, your conveying the 497covered work in a country, or your recipient's use of the covered work 498in a country, would infringe one or more identifiable patents in that 499country that you have reason to believe are valid. 500 501 If, pursuant to or in connection with a single transaction or 502arrangement, you convey, or propagate by procuring conveyance of, a 503covered work, and grant a patent license to some of the parties 504receiving the covered work authorizing them to use, propagate, modify 505or convey a specific copy of the covered work, then the patent license 506you grant is automatically extended to all recipients of the covered 507work and works based on it. 508 509 A patent license is "discriminatory" if it does not include within 510the scope of its coverage, prohibits the exercise of, or is 511conditioned on the non-exercise of one or more of the rights that are 512specifically granted under this License. You may not convey a covered 513work if you are a party to an arrangement with a third party that is 514in the business of distributing software, under which you make payment 515to the third party based on the extent of your activity of conveying 516the work, and under which the third party grants, to any of the 517parties who would receive the covered work from you, a discriminatory 518patent license (a) in connection with copies of the covered work 519conveyed by you (or copies made from those copies), or (b) primarily 520for and in connection with specific products or compilations that 521contain the covered work, unless you entered into that arrangement, 522or that patent license was granted, prior to 28 March 2007. 523 524 Nothing in this License shall be construed as excluding or limiting 525any implied license or other defenses to infringement that may 526otherwise be available to you under applicable patent law. 527 528 12. No Surrender of Others' Freedom. 529 530 If conditions are imposed on you (whether by court order, agreement or 531otherwise) that contradict the conditions of this License, they do not 532excuse you from the conditions of this License. If you cannot convey a 533covered work so as to satisfy simultaneously your obligations under this 534License and any other pertinent obligations, then as a consequence you may 535not convey it at all. For example, if you agree to terms that obligate you 536to collect a royalty for further conveying from those to whom you convey 537the Program, the only way you could satisfy both those terms and this 538License would be to refrain entirely from conveying the Program. 539 540 13. Remote Network Interaction; Use with the GNU General Public License. 541 542 Notwithstanding any other provision of this License, if you modify the 543Program, your modified version must prominently offer all users 544interacting with it remotely through a computer network (if your version 545supports such interaction) an opportunity to receive the Corresponding 546Source of your version by providing access to the Corresponding Source 547from a network server at no charge, through some standard or customary 548means of facilitating copying of software. This Corresponding Source 549shall include the Corresponding Source for any work covered by version 3 550of the GNU General Public License that is incorporated pursuant to the 551following paragraph. 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 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 work with which it is combined will remain governed by version 5593 of the GNU General Public License. 560 561 14. Revised Versions of this License. 562 563 The Free Software Foundation may publish revised and/or new versions of 564the GNU Affero General Public License from time to time. Such new versions 565will be similar in spirit to the present version, but may differ in detail to 566address new problems or concerns. 567 568 Each version is given a distinguishing version number. If the 569Program specifies that a certain numbered version of the GNU Affero General 570Public License "or any later version" applies to it, you have the 571option of following the terms and conditions either of that numbered 572version or of any later version published by the Free Software 573Foundation. If the Program does not specify a version number of the 574GNU Affero General Public License, you may choose any version ever published 575by the Free Software Foundation. 576 577 If the Program specifies that a proxy can decide which future 578versions of the GNU Affero General Public License can be used, that proxy's 579public statement of acceptance of a version permanently authorizes you 580to choose that version for the Program. 581 582 Later license versions may give you additional or different 583permissions. However, no additional obligations are imposed on any 584author or copyright holder as a result of your choosing to follow a 585later version. 586 587 15. Disclaimer of Warranty. 588 589 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 598 16. Limitation of Liability. 599 600 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608SUCH DAMAGES. 609 610 17. Interpretation of Sections 15 and 16. 611 612 If the disclaimer of warranty and limitation of liability provided 613above cannot be given local legal effect according to their terms, 614reviewing courts shall apply local law that most closely approximates 615an absolute waiver of all civil liability in connection with the 616Program, unless a warranty or assumption of liability accompanies a 617copy of the Program in return for a fee. 618 619 END OF TERMS AND CONDITIONS 620 621 How to Apply These Terms to Your New Programs 622 623 If you develop a new program, and you want it to be of the greatest 624possible use to the public, the best way to achieve this is to make it 625free software which everyone can redistribute and change under these terms. 626 627 To do so, attach the following notices to the program. It is safest 628to attach them to the start of each source file to most effectively 629state the exclusion of warranty; and each file should have at least 630the "copyright" line and a pointer to where the full notice is found. 631 632 <one line to give the program's name and a brief idea of what it does.> 633 Copyright (C) <year> <name of author> 634 635 This program is free software: you can redistribute it and/or modify 636 it under the terms of the GNU Affero General Public License as published by 637 the Free Software Foundation, either version 3 of the License, or 638 (at your option) any later version. 639 640 This program is distributed in the hope that it will be useful, 641 but WITHOUT ANY WARRANTY; without even the implied warranty of 642 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 GNU Affero General Public License for more details. 644 645 You should have received a copy of the GNU Affero General Public License 646 along with this program. If not, see <http://www.gnu.org/licenses/>. 647 648Also add information on how to contact you by electronic and paper mail. 649 650 If your software can interact with users remotely through a computer 651network, you should also make sure that it provides a way for users to 652get its source. For example, if your program is a web application, its 653interface could display a "Source" link that leads users to an archive 654of the code. There are many ways you could offer source, and different 655solutions will be better for different programs; see section 13 for the 656specific requirements. 657 658 You should also get your employer (if you work as a programmer) or school, 659if any, to sign a "copyright disclaimer" for the program, if necessary. 660For more information on this, and how to apply and follow the GNU AGPL, see 661<http://www.gnu.org/licenses/>.