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open source license wikipedia 211 captures 04 jan 2004 22 aug 2026 sep oct nov 06 2021 2022 2023 success fail about this capture timestamps the wayback machine http web archive org web 20221006173807 http en wikipedia org wiki open_source_license open source license from wikipedia the free encyclopedia redirected from open source license jump to navigation jump to search software license allowing source code to be used modified and shared an open source license is a type of license for computer software and other products that allows the source code blueprint or design to be used modified and or shared under defined terms and conditions 1 2 this allows end users and commercial companies to review and modify the source code blueprint or design for their own customization curiosity or troubleshooting needs open source licensed software is mostly available free of charge though this does not necessarily have to be the case 3 licenses which only permit non commercial redistribution or modification of the source code for personal use only are generally not considered as open source licenses 3 however open source licenses may have some restrictions particularly regarding the expression of respect to the origin of software such as a requirement to preserve the name of the authors and a copyright statement within the code or a requirement to redistribute the licensed software only under the same license as in a copyleft license there have been debates about whether open source licenses which permit copyholders to use transfer and modify software have adequate consideration to be viewed by the courts as legally enforceable contracts 4 while some academics have argued that open source licenses are not contracts because there is no consideration others have argued that the significant societal value provided by the role that open source licenses play in promoting software development and improvement by facilitating access to source code offers adequate consideration 4 one popular set of open source software licenses are those approved by the open source initiative osi based on their open source definition osd open source licenses dictate the terms and conditions that come with the use of open source software oss open source licenses serve as a legal agreement between open source author and user authors make oss available for free but with certain requirements the user must follow generally open source license terms kick in upon distribution of your software if you only use an open source component for an internal tool for example you probably won t be bound by requirements that would otherwise apply contents 1 comparisons 2 public domain 3 see also 4 references 5 external links comparisons edit the free software foundation has related but distinct criteria for evaluating whether or not a license qualifies software as free software most free software licenses are also considered open source software licenses 5 in the same way the debian project has its own criteria the debian free software guidelines on which the open source definition is based in the interpretation of the fsf open source license criteria focus on the availability of the source code and the ability to modify and share it while free software licenses focuses on the user s freedom to use the program to modify it and to share it 6 source available licenses ensure source code availability but do not necessarily meet the user freedom criteria to be classified as free software or open source software public domain edit main article public domain software see also public domain equivalent license around 2004 lawyer lawrence rosen argued in the essay why the public domain isn t a license that software could not truly be waived into the public domain and can t therefore be interpreted as very permissive open source license 7 a position which faced opposition by daniel j bernstein and others 8 in 2012 the dispute was finally resolved when rosen accepted the cc0 as an open source license while admitting that contrary to his previous claims copyright can be waived away backed by ninth circuit decisions 9 see also edit beerware comparison of free and open source software licenses free software license jacobsen v katzer a ruling which states that legal copyrights can have 0 value and thereby supports all licenses both commercial and open source list of free content licenses multi licensing open source model open source software proprietary software software license open source license litigation list of free and open source software licenses list of copyleft software licenses list of permissive software licenses references edit brief definition of open source licenses open source initiative retrieved april 25 2013 popp dr karl michael 2015 best practices for commercial use of open source software norderstedt germany books on demand isbn 978 3738619096 a b haumba eric nelson 2018 open licensing models for strengthening access to information opportunities for authors ymca library uganda textbook academic and non fiction authors association utana isbn 9789970428052 a b hillman robert o rourke maureen january 2009 rethinking consideration in the electronic age hastings law journal 61 2009 313 14 328 35 stallman richard 18 november 2016 why open source misses the point of free software the gnu project retrieved 1 october 2018 relationship between the free software movement and open source movement free software foundation inc lawrence rosen 2004 05 25 why the public domain isn t a license rosenlaw com retrieved 2016 02 22 placing documents into the public domain by daniel j bernstein on cr yp to most rights can be voluntarily abandoned waived by the owner of the rights legislators can go to extra effort to create rights that can t be abandoned but usually they don t do this in particular you can voluntarily abandon your united states copyrights it is well settled that rights gained under the copyright act may be abandoned but abandonment of a right must be manifested by some overt act indicating an intention to abandon that right see hampton v paramount pictures corp 279 f 2d 100 104 9th cir 1960 2004 lawrence rosen 2012 03 08 license review license discuss cc0 incompliant with osd on patents was mxm compared to cc0 opensource org archived from the original on 2016 03 12 retrieved 2016 02 22 the case you referenced in your email hampton v paramount pictures 279 f 2d 100 9th cir cal 1960 stands for the proposition that at least in the ninth circuit a person can indeed abandon his copyrights counter to what i wrote in my article but it takes the equivalent of a manifest license to do so for the record i have already voted 1 to approve the cc0 public domain dedication and fallback license as osd compliant i admit that i have argued for years against the public domain as an open source license but in retrospect considering the minimal risk to developers and users relying on such software and the evident popularity of that license i changed my mind one can t stand in the way of a fire hose of free public domain software even if it doesn t come with a better foss license that i trust more external links edit the open source initiative an online version of lawrence rosen s book open source licensing software freedom and intellectual property law isbn 0 13 148787 6 understanding open source software by red hat s mark webbink esq an overview of copyright and open source v t e software distribution licenses beerware floating licensing free and open source free open source freely redistributable proprietary public domain source available compensation models adware commercial software retail software crippleware crowdfunding freemium freeware pay what you want careware donationware open core model postcardware shareware nagware trialware delivery methods digital distribution file sharing on premises pre installed product bundling retail software sneakernet software as a service deceptive and or illicit unwanted software bundling malware spyware trojan horse worm ransomware scareware shovelware vaporware list software release life cycle abandonware end of life long term support software maintenance software maintainer software publisher copy protection digital rights management software protection dongle hardware restrictions license manager product activation product key software copyright software patent torrent poisoning v t e free and open source software general alternative terms for free software comparison of open source and closed source software comparison of source code hosting facilities free software free software project directories gratis versus libre long term support open source software open source software development outline timeline software packages audio bioinformatics codecs configuration management drivers graphics wireless geophysics health mathematics office suites operating systems programming languages routing television video games web applications e commerce android apps ios apps commercial trademarked formerly proprietary formerly open source community free software movement history open source software movement events organisations free software movement of india free software foundation licenses afl apache apsl artistic beerware bsd creative commons cddl epl free software foundation gnu gpl gnu lgpl isc mit mpl python python software foundation license shared source initiative sleepycat unlicense wtfpl zlib types and standards comparison of licenses contributor license agreement copyleft debian free software guidelines definition of free cultural works free license the free software definition the open source definition open source license permissive software license public domain viral license challenges digital rights management hardware restrictions license proliferation mozilla software rebranding proprietary device drivers proprietary firmware proprietary software sco linux controversies software patents software security trusted computing related topics forking gnu manifesto microsoft open specification promise open core model open source hardware shared source initiative source available software the cathedral and the bazaar revolution os portal category retrieved from https en wikipedia org w index php title open source_license oldid 1103880050 categories free and open source software licenses terms of service free culture movement hidden categories articles with short description short description is different from wikidata navigation menu personal tools not logged in talk contributions create account log in namespaces article talk english views read edit view history more search navigation main page contents current events random article about wikipedia contact us donate contribute help learn to edit community portal recent changes upload file tools what links here related changes upload file special pages permanent link page information cite this page wikidata item print export download as pdf printable 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