Changes for page 3. Free Software and Open Source Software
Last modified by chrisby on 2025/01/11 10:03
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... ... @@ -47,11 +47,11 @@ 47 47 48 48 **Copyleft Licenses** 49 49 50 -To address problems with proprietary software, the FSF promotes copyleft licenses, such as the AGPL,which require that any derivative worksremain under the samelicense. The term "derivative work" is somewhat vaguein legal terms, buta common interpretationisthatsoftware that dependsonAGPL code to function is aderivative work.50 +To address the problems with proprietary software, the FSF primarily promotes copyleft licenses, which require that any derivative works of the software be licensed under the same terms as the original code. The term "derivative work" is legally somewhat vague, but here is a common understanding: 51 51 52 - Forexample, if a project directly incorporates AGPL source code or relies on an AGPL library, it must adopt theAGPL licensefor its entire code base.Similarly, ifsoftwarecallsanexternal AGPLserviceover a network, the softwareis usually not aderivativework. However,if the serviceis essentialandthe softwarewon't workwithoutit,even ifthe AGPL code is hostedexternally, thesoftwareisstill considered a derivative work. Attemptingto "workaround"theAGPLby outsourcing essentialfunctions in a network service will notavoid the licenserequirements.52 +* When a software uses the source code directly in order to build, that means using a AGPL lilibrary 53 53 54 - Insummary,copyleftlicenseslike theAGPLensurehatwhenevercode is reused orcontributionsaremade to existing copyleft code,the resultingworkmustremain open source.Theselicensesalsorequire that the source code be made availableuponrequest,so thatuserscan modify, build, and control the software themselvesif they wish.54 +This ensures that when contributions are made to a copyleft project, or when copyleft code is directly reused in another project, the resulting work must be released under the same copyleft license. This prevents vendors from incorporating copyleft code into proprietary products, and ensures that any derivative works remain open source. In addition, copyleft licenses require that the source code be made available to users so that they can modify, build, and control the software themselves. 55 55 56 56 **License Preferences** 57 57