Mercurial > libervia-backend
annotate COPYING @ 3950:8f87ff449a34
doc: new doc giving an overview on how e2ee is working in Libervia/XMPP:
the doc explain pubsub e2ee for now
rel 380
| author | Goffi <goffi@goffi.org> |
|---|---|
| date | Sat, 15 Oct 2022 20:38:33 +0200 |
| parents | 2a072735e459 |
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| rev | line source |
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1 GNU AFFERO GENERAL PUBLIC LICENSE |
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2 Version 3, 19 November 2007 |
| 0 | 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 | |
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10 The GNU Affero General Public License is a free, copyleft license for |
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11 software and other kinds of works, specifically designed to ensure |
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12 cooperation with the community in the case of network server software. |
| 0 | 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, | |
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16 our General Public Licenses are intended to guarantee your freedom to |
| 0 | 17 share and change all versions of a program--to make sure it remains free |
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18 software for all its users. |
| 0 | 19 |
| 20 When we speak of free software, we are referring to freedom, not | |
| 21 price. Our General Public Licenses are designed to make sure that you | |
| 22 have the freedom to distribute copies of free software (and charge for | |
| 23 them if you wish), that you receive source code or can get it if you | |
| 24 want it, that you can change the software or use pieces of it in new | |
| 25 free programs, and that you know you can do these things. | |
| 26 | |
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27 Developers that use our General Public Licenses protect your rights |
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28 with two steps: (1) assert copyright on the software, and (2) offer |
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29 you this License which gives you legal permission to copy, distribute |
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30 and/or modify the software. |
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32 A secondary benefit of defending all users' freedom is that |
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33 improvements made in alternate versions of the program, if they |
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34 receive widespread use, become available for other developers to |
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35 incorporate. Many developers of free software are heartened and |
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36 encouraged by the resulting cooperation. However, in the case of |
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37 software used on network servers, this result may fail to come about. |
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38 The GNU General Public License permits making a modified version and |
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39 letting the public access it on a server without ever releasing its |
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40 source code to the public. |
| 0 | 41 |
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42 The GNU Affero General Public License is designed specifically to |
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43 ensure that, in such cases, the modified source code becomes available |
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44 to the community. It requires the operator of a network server to |
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45 provide the source code of the modified version running there to the |
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46 users of that server. Therefore, public use of a modified version, on |
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47 a publicly accessible server, gives the public access to the source |
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48 code of the modified version. |
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50 An older license, called the Affero General Public License and |
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51 published by Affero, was designed to accomplish similar goals. This is |
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52 a different license, not a version of the Affero GPL, but Affero has |
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53 released a new version of the Affero GPL which permits relicensing under |
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54 this license. |
| 0 | 55 |
| 56 The precise terms and conditions for copying, distribution and | |
| 57 modification follow. | |
| 58 | |
| 59 TERMS AND CONDITIONS | |
| 60 | |
| 61 0. Definitions. | |
| 62 | |
|
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63 "This License" refers to version 3 of the GNU Affero General Public License. |
| 0 | 64 |
| 65 "Copyright" also means copyright-like laws that apply to other kinds of | |
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| 331 7. Additional Terms. | |
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| 369 | |
| 370 f) Requiring indemnification of licensors and authors of that | |
| 371 material by anyone who conveys the material (or modified versions of | |
| 372 it) with contractual assumptions of liability to the recipient, for | |
| 373 any liability that these contractual assumptions directly impose on | |
| 374 those licensors and authors. | |
| 375 | |
| 376 All other non-permissive additional terms are considered "further | |
| 377 restrictions" within the meaning of section 10. If the Program as you | |
| 378 received it, or any part of it, contains a notice stating that it is | |
| 379 governed by this License along with a term that is a further | |
| 380 restriction, you may remove that term. If a license document contains | |
| 381 a further restriction but permits relicensing or conveying under this | |
| 382 License, you may add to a covered work material governed by the terms | |
| 383 of that license document, provided that the further restriction does | |
| 384 not survive such relicensing or conveying. | |
| 385 | |
| 386 If you add terms to a covered work in accord with this section, you | |
| 387 must place, in the relevant source files, a statement of the | |
| 388 additional terms that apply to those files, or a notice indicating | |
| 389 where to find the applicable terms. | |
| 390 | |
| 391 Additional terms, permissive or non-permissive, may be stated in the | |
| 392 form of a separately written license, or stated as exceptions; | |
| 393 the above requirements apply either way. | |
| 394 | |
| 395 8. Termination. | |
| 396 | |
| 397 You may not propagate or modify a covered work except as expressly | |
| 398 provided under this License. Any attempt otherwise to propagate or | |
| 399 modify it is void, and will automatically terminate your rights under | |
| 400 this License (including any patent licenses granted under the third | |
| 401 paragraph of section 11). | |
| 402 | |
| 403 However, if you cease all violation of this License, then your | |
| 404 license from a particular copyright holder is reinstated (a) | |
| 405 provisionally, unless and until the copyright holder explicitly and | |
| 406 finally terminates your license, and (b) permanently, if the copyright | |
| 407 holder fails to notify you of the violation by some reasonable means | |
| 408 prior to 60 days after the cessation. | |
| 409 | |
| 410 Moreover, your license from a particular copyright holder is | |
| 411 reinstated permanently if the copyright holder notifies you of the | |
| 412 violation by some reasonable means, this is the first time you have | |
| 413 received notice of violation of this License (for any work) from that | |
| 414 copyright holder, and you cure the violation prior to 30 days after | |
| 415 your receipt of the notice. | |
| 416 | |
| 417 Termination of your rights under this section does not terminate the | |
| 418 licenses of parties who have received copies or rights from you under | |
| 419 this License. If your rights have been terminated and not permanently | |
| 420 reinstated, you do not qualify to receive new licenses for the same | |
| 421 material under section 10. | |
| 422 | |
| 423 9. Acceptance Not Required for Having Copies. | |
| 424 | |
| 425 You are not required to accept this License in order to receive or | |
| 426 run a copy of the Program. Ancillary propagation of a covered work | |
| 427 occurring solely as a consequence of using peer-to-peer transmission | |
| 428 to receive a copy likewise does not require acceptance. However, | |
| 429 nothing other than this License grants you permission to propagate or | |
| 430 modify any covered work. These actions infringe copyright if you do | |
| 431 not accept this License. Therefore, by modifying or propagating a | |
| 432 covered work, you indicate your acceptance of this License to do so. | |
| 433 | |
| 434 10. Automatic Licensing of Downstream Recipients. | |
| 435 | |
| 436 Each time you convey a covered work, the recipient automatically | |
| 437 receives a license from the original licensors, to run, modify and | |
| 438 propagate that work, subject to this License. You are not responsible | |
| 439 for enforcing compliance by third parties with this License. | |
| 440 | |
| 441 An "entity transaction" is a transaction transferring control of an | |
| 442 organization, or substantially all assets of one, or subdividing an | |
| 443 organization, or merging organizations. If propagation of a covered | |
| 444 work results from an entity transaction, each party to that | |
| 445 transaction who receives a copy of the work also receives whatever | |
| 446 licenses to the work the party's predecessor in interest had or could | |
| 447 give under the previous paragraph, plus a right to possession of the | |
| 448 Corresponding Source of the work from the predecessor in interest, if | |
| 449 the predecessor has it or can get it with reasonable efforts. | |
| 450 | |
| 451 You may not impose any further restrictions on the exercise of the | |
| 452 rights granted or affirmed under this License. For example, you may | |
| 453 not impose a license fee, royalty, or other charge for exercise of | |
| 454 rights granted under this License, and you may not initiate litigation | |
| 455 (including a cross-claim or counterclaim in a lawsuit) alleging that | |
| 456 any patent claim is infringed by making, using, selling, offering for | |
| 457 sale, 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 | |
| 462 License of the Program or a work on which the Program is based. The | |
| 463 work thus licensed is called the contributor's "contributor version". | |
| 464 | |
| 465 A contributor's "essential patent claims" are all patent claims | |
| 466 owned or controlled by the contributor, whether already acquired or | |
| 467 hereafter acquired, that would be infringed by some manner, permitted | |
| 468 by this License, of making, using, or selling its contributor version, | |
| 469 but do not include claims that would be infringed only as a | |
| 470 consequence of further modification of the contributor version. For | |
| 471 purposes of this definition, "control" includes the right to grant | |
| 472 patent sublicenses in a manner consistent with the requirements of | |
| 473 this License. | |
| 474 | |
| 475 Each contributor grants you a non-exclusive, worldwide, royalty-free | |
| 476 patent license under the contributor's essential patent claims, to | |
| 477 make, use, sell, offer for sale, import and otherwise run, modify and | |
| 478 propagate the contents of its contributor version. | |
| 479 | |
| 480 In the following three paragraphs, a "patent license" is any express | |
| 481 agreement or commitment, however denominated, not to enforce a patent | |
| 482 (such as an express permission to practice a patent or covenant not to | |
| 483 sue for patent infringement). To "grant" such a patent license to a | |
| 484 party means to make such an agreement or commitment not to enforce a | |
| 485 patent against the party. | |
| 486 | |
| 487 If you convey a covered work, knowingly relying on a patent license, | |
| 488 and the Corresponding Source of the work is not available for anyone | |
| 489 to copy, free of charge and under the terms of this License, through a | |
| 490 publicly available network server or other readily accessible means, | |
| 491 then you must either (1) cause the Corresponding Source to be so | |
| 492 available, or (2) arrange to deprive yourself of the benefit of the | |
| 493 patent license for this particular work, or (3) arrange, in a manner | |
| 494 consistent with the requirements of this License, to extend the patent | |
| 495 license to downstream recipients. "Knowingly relying" means you have | |
| 496 actual knowledge that, but for the patent license, your conveying the | |
| 497 covered work in a country, or your recipient's use of the covered work | |
| 498 in a country, would infringe one or more identifiable patents in that | |
| 499 country that you have reason to believe are valid. | |
| 500 | |
| 501 If, pursuant to or in connection with a single transaction or | |
| 502 arrangement, you convey, or propagate by procuring conveyance of, a | |
| 503 covered work, and grant a patent license to some of the parties | |
| 504 receiving the covered work authorizing them to use, propagate, modify | |
| 505 or convey a specific copy of the covered work, then the patent license | |
| 506 you grant is automatically extended to all recipients of the covered | |
| 507 work and works based on it. | |
| 508 | |
| 509 A patent license is "discriminatory" if it does not include within | |
| 510 the scope of its coverage, prohibits the exercise of, or is | |
| 511 conditioned on the non-exercise of one or more of the rights that are | |
| 512 specifically granted under this License. You may not convey a covered | |
| 513 work if you are a party to an arrangement with a third party that is | |
| 514 in the business of distributing software, under which you make payment | |
| 515 to the third party based on the extent of your activity of conveying | |
| 516 the work, and under which the third party grants, to any of the | |
| 517 parties who would receive the covered work from you, a discriminatory | |
| 518 patent license (a) in connection with copies of the covered work | |
| 519 conveyed by you (or copies made from those copies), or (b) primarily | |
| 520 for and in connection with specific products or compilations that | |
| 521 contain the covered work, unless you entered into that arrangement, | |
| 522 or that patent license was granted, prior to 28 March 2007. | |
| 523 | |
| 524 Nothing in this License shall be construed as excluding or limiting | |
| 525 any implied license or other defenses to infringement that may | |
| 526 otherwise 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 | |
| 531 otherwise) that contradict the conditions of this License, they do not | |
| 532 excuse you from the conditions of this License. If you cannot convey a | |
| 533 covered work so as to satisfy simultaneously your obligations under this | |
| 534 License and any other pertinent obligations, then as a consequence you may | |
| 535 not convey it at all. For example, if you agree to terms that obligate you | |
| 536 to collect a royalty for further conveying from those to whom you convey | |
| 537 the Program, the only way you could satisfy both those terms and this | |
| 538 License would be to refrain entirely from conveying the Program. | |
| 539 | |
|
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540 13. Remote Network Interaction; Use with the GNU General Public License. |
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541 |
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542 Notwithstanding any other provision of this License, if you modify the |
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543 Program, your modified version must prominently offer all users |
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544 interacting with it remotely through a computer network (if your version |
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545 supports such interaction) an opportunity to receive the Corresponding |
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546 Source of your version by providing access to the Corresponding Source |
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547 from a network server at no charge, through some standard or customary |
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548 means of facilitating copying of software. This Corresponding Source |
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549 shall include the Corresponding Source for any work covered by version 3 |
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550 of the GNU General Public License that is incorporated pursuant to the |
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551 following paragraph. |
| 0 | 552 |
| 553 Notwithstanding any other provision of this License, you have | |
| 554 permission to link or combine any covered work with a work licensed | |
|
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555 under version 3 of the GNU General Public License into a single |
| 0 | 556 combined work, and to convey the resulting work. The terms of this |
| 557 License will continue to apply to the part which is the covered work, | |
|
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558 but the work with which it is combined will remain governed by version |
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559 3 of the GNU General Public License. |
| 0 | 560 |
| 561 14. Revised Versions of this License. | |
| 562 | |
| 563 The Free Software Foundation may publish revised and/or new versions of | |
|
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564 the GNU Affero General Public License from time to time. Such new versions |
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565 will be similar in spirit to the present version, but may differ in detail to |
| 0 | 566 address new problems or concerns. |
| 567 | |
| 568 Each version is given a distinguishing version number. If the | |
|
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569 Program specifies that a certain numbered version of the GNU Affero General |
| 0 | 570 Public License "or any later version" applies to it, you have the |
| 571 option of following the terms and conditions either of that numbered | |
| 572 version or of any later version published by the Free Software | |
| 573 Foundation. If the Program does not specify a version number of the | |
|
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574 GNU Affero General Public License, you may choose any version ever published |
| 0 | 575 by the Free Software Foundation. |
| 576 | |
| 577 If the Program specifies that a proxy can decide which future | |
|
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578 versions of the GNU Affero General Public License can be used, that proxy's |
| 0 | 579 public statement of acceptance of a version permanently authorizes you |
| 580 to choose that version for the Program. | |
| 581 | |
| 582 Later license versions may give you additional or different | |
| 583 permissions. However, no additional obligations are imposed on any | |
| 584 author or copyright holder as a result of your choosing to follow a | |
| 585 later version. | |
| 586 | |
| 587 15. Disclaimer of Warranty. | |
| 588 | |
| 589 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY | |
| 590 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT | |
| 591 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY | |
| 592 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, | |
| 593 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 594 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM | |
| 595 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF | |
| 596 ALL 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 | |
| 601 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS | |
| 602 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY | |
| 603 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE | |
| 604 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF | |
| 605 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD | |
| 606 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), | |
| 607 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF | |
| 608 SUCH DAMAGES. | |
| 609 | |
| 610 17. Interpretation of Sections 15 and 16. | |
| 611 | |
| 612 If the disclaimer of warranty and limitation of liability provided | |
| 613 above cannot be given local legal effect according to their terms, | |
| 614 reviewing courts shall apply local law that most closely approximates | |
| 615 an absolute waiver of all civil liability in connection with the | |
| 616 Program, unless a warranty or assumption of liability accompanies a | |
| 617 copy 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 | |
| 624 possible use to the public, the best way to achieve this is to make it | |
| 625 free 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 | |
| 628 to attach them to the start of each source file to most effectively | |
| 629 state the exclusion of warranty; and each file should have at least | |
| 630 the "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 | |
|
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636 it under the terms of the GNU Affero General Public License as published by |
| 0 | 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 | |
|
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643 GNU Affero General Public License for more details. |
| 0 | 644 |
|
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645 You should have received a copy of the GNU Affero General Public License |
| 0 | 646 along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 647 | |
| 648 Also add information on how to contact you by electronic and paper mail. | |
| 649 | |
|
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650 If your software can interact with users remotely through a computer |
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651 network, you should also make sure that it provides a way for users to |
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652 get its source. For example, if your program is a web application, its |
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653 interface could display a "Source" link that leads users to an archive |
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654 of the code. There are many ways you could offer source, and different |
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655 solutions will be better for different programs; see section 13 for the |
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656 specific requirements. |
| 0 | 657 |
| 658 You should also get your employer (if you work as a programmer) or school, | |
| 659 if any, to sign a "copyright disclaimer" for the program, if necessary. | |
|
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660 For more information on this, and how to apply and follow the GNU AGPL, see |
| 0 | 661 <http://www.gnu.org/licenses/>. |