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Patents. 696 697 A "contributor" is a copyright holder who authorizes use under this 698 License of the Program or a work on which the Program is based. The 699 work thus licensed is called the contributor's "contributor version". 700 701 A contributor's "essential patent claims" are all patent claims 702 owned or controlled by the contributor, whether already acquired or 703 hereafter acquired, that would be infringed by some manner, permitted 704 by this License, of making, using, or selling its contributor version, 705 but do not include claims that would be infringed only as a 706 consequence of further modification of the contributor version. For 707 purposes of this definition, "control" includes the right to grant 708 patent sublicenses in a manner consistent with the requirements of 709 this License. 710 711 Each contributor grants you a non-exclusive, worldwide, royalty-free 712 patent license under the contributor's essential patent claims, to 713 make, use, sell, offer for sale, import and otherwise run, modify and 714 propagate the contents of its contributor version. 715 716 In the following three paragraphs, a "patent license" is any express 717 agreement or commitment, however denominated, not to enforce a patent 718 (such as an express permission to practice a patent or covenant not to 719 sue for patent infringement). To "grant" such a patent license to a 720 party means to make such an agreement or commitment not to enforce a 721 patent against the party. 722 723 If you convey a covered work, knowingly relying on a patent license, 724 and the Corresponding Source of the work is not available for anyone 725 to copy, free of charge and under the terms of this License, through a 726 publicly available network server or other readily accessible means, 727 then you must either (1) cause the Corresponding Source to be so 728 available, or (2) arrange to deprive yourself of the benefit of the 729 patent license for this particular work, or (3) arrange, in a manner 730 consistent with the requirements of this License, to extend the patent 731 license to downstream recipients. "Knowingly relying" means you have 732 actual knowledge that, but for the patent license, your conveying the 733 covered work in a country, or your recipient's use of the covered work 734 in a country, would infringe one or more identifiable patents in that 735 country that you have reason to believe are valid. 736 737 If, pursuant to or in connection with a single transaction or 738 arrangement, you convey, or propagate by procuring conveyance of, a 739 covered work, and grant a patent license to some of the parties 740 receiving the covered work authorizing them to use, propagate, modify 741 or convey a specific copy of the covered work, then the patent license 742 you grant is automatically extended to all recipients of the covered 743 work and works based on it. 744 745 A patent license is "discriminatory" if it does not include within 746 the scope of its coverage, prohibits the exercise of, or is 747 conditioned on the non-exercise of one or more of the rights that are 748 specifically granted under this License. You may not convey a covered 749 work if you are a party to an arrangement with a third party that is 750 in the business of distributing software, under which you make payment 751 to the third party based on the extent of your activity of conveying 752 the work, and under which the third party grants, to any of the 753 parties who would receive the covered work from you, a discriminatory 754 patent license (a) in connection with copies of the covered work 755 conveyed by you (or copies made from those copies), or (b) primarily 756 for and in connection with specific products or compilations that 757 contain the covered work, unless you entered into that arrangement, 758 or that patent license was granted, prior to 28 March 2007. 759 760 Nothing in this License shall be construed as excluding or limiting 761 any implied license or other defenses to infringement that may 762 otherwise be available to you under applicable patent law. 763 764 12. No Surrender of Others' Freedom. 765 766 If conditions are imposed on you (whether by court order, agreement or 767 otherwise) that contradict the conditions of this License, they do not 768 excuse you from the conditions of this License. If you cannot convey a 769 covered work so as to satisfy simultaneously your obligations under this 770 License and any other pertinent obligations, then as a consequence you may 771 not convey it at all. For example, if you agree to terms that obligate you 772 to collect a royalty for further conveying from those to whom you convey 773 the Program, the only way you could satisfy both those terms and this 774 License would be to refrain entirely from conveying the Program. 775 776 13. Remote Network Interaction; Use with the GNU General Public License. 777 778 Notwithstanding any other provision of this License, if you modify the 779 Program, your modified version must prominently offer all users 780 interacting with it remotely through a computer network (if your version 781 supports such interaction) an opportunity to receive the Corresponding 782 Source of your version by providing access to the Corresponding Source 783 from a network server at no charge, through some standard or customary 784 means of facilitating copying of software. This Corresponding Source 785 shall include the Corresponding Source for any work covered by version 3 786 of the GNU General Public License that is incorporated pursuant to the 787 following paragraph. 788 789 Notwithstanding any other provision of this License, you have 790 permission to link or combine any covered work with a work licensed 791 under version 3 of the GNU General Public License into a single 792 combined work, and to convey the resulting work. The terms of this 793 License will continue to apply to the part which is the covered work, 794 but the work with which it is combined will remain governed by version 795 3 of the GNU General Public License. 796 797 14. Revised Versions of this License. 798 799 The Free Software Foundation may publish revised and/or new versions of 800 the GNU Affero General Public License from time to time. Such new versions 801 will be similar in spirit to the present version, but may differ in detail to 802 address new problems or concerns. 803 804 Each version is given a distinguishing version number. If the 805 Program specifies that a certain numbered version of the GNU Affero General 806 Public License "or any later version" applies to it, you have the 807 option of following the terms and conditions either of that numbered 808 version or of any later version published by the Free Software 809 Foundation. If the Program does not specify a version number of the 810 GNU Affero General Public License, you may choose any version ever published 811 by the Free Software Foundation. 812 813 If the Program specifies that a proxy can decide which future 814 versions of the GNU Affero General Public License can be used, that proxy's 815 public statement of acceptance of a version permanently authorizes you 816 to choose that version for the Program. 817 818 Later license versions may give you additional or different 819 permissions. However, no additional obligations are imposed on any 820 author or copyright holder as a result of your choosing to follow a 821 later version. 822 823 15. Disclaimer of Warranty. 824 825 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 826 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 827 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 828 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 829 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 830 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 831 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 832 ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 833 834 16. Limitation of Liability. 835 836 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 837 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 838 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 839 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 840 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 841 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 842 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 843 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 844 SUCH DAMAGES. 845 846 17. Interpretation of Sections 15 and 16. 847 848 If the disclaimer of warranty and limitation of liability provided 849 above cannot be given local legal effect according to their terms, 850 reviewing courts shall apply local law that most closely approximates 851 an absolute waiver of all civil liability in connection with the 852 Program, unless a warranty or assumption of liability accompanies a 853 copy of the Program in return for a fee. 854 855 END OF TERMS AND CONDITIONS 856 857 How to Apply These Terms to Your New Programs 858 859 If you develop a new program, and you want it to be of the greatest 860 possible use to the public, the best way to achieve this is to make it 861 free software which everyone can redistribute and change under these terms. 862 863 To do so, attach the following notices to the program. It is safest 864 to attach them to the start of each source file to most effectively 865 state the exclusion of warranty; and each file should have at least 866 the "copyright" line and a pointer to where the full notice is found. 867 868 <one line to give the program's name and a brief idea of what it does.> 869 Copyright (C) <year> <name of author> 870 871 This program is free software: you can redistribute it and/or modify 872 it under the terms of the GNU Affero General Public License as published by 873 the Free Software Foundation, either version 3 of the License, or 874 (at your option) any later version. 875 876 This program is distributed in the hope that it will be useful, 877 but WITHOUT ANY WARRANTY; without even the implied warranty of 878 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 879 GNU Affero General Public License for more details. 880 881 You should have received a copy of the GNU Affero General Public License 882 along with this program. If not, see <http://www.gnu.org/licenses/>. 883 884 Also add information on how to contact you by electronic and paper mail. 885 886 If your software can interact with users remotely through a computer 887 network, you should also make sure that it provides a way for users to 888 get its source. For example, if your program is a web application, its 889 interface could display a "Source" link that leads users to an archive 890 of the code. There are many ways you could offer source, and different 891 solutions will be better for different programs; see section 13 for the 892 specific requirements. 893 894 You should also get your employer (if you work as a programmer) or school, 895 if any, to sign a "copyright disclaimer" for the program, if necessary. 896 For more information on this, and how to apply and follow the GNU AGPL, see 897 <http://www.gnu.org/licenses/>.