Changes for page 3. Free Software and Open Source Software
Last modified by chrisby on 2025/01/11 10:03
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... ... @@ -47,14 +47,11 @@ 47 47 48 48 **Copyleft Licenses** 49 49 50 -To address theproblems with proprietary software, the FSF primarily promotes copyleft licenses, which require that any derivative worksof the softwarebe licensedunder the sametermsas the originalcode.The term "derivative work"islegallysomewhat vague,buthereis a commonunderstandingis:Ifthe AGPL code is essential forthesoftwaretowork, thenthesoftwareisconsidereda derivativeproduct. Forexample:50 +To address problems with proprietary software, the FSF promotes copyleft licenses, like the AGPL license, which require that any derivative works remain under the same license. The notion of “derivative work” is somewhat vague in legal terms, but a common interpretation is that software depending on AGPL code to function is a derivative work. 51 51 52 -* When a software needs AGPL source code directly its a derivate work. that means using a AGPL licensed library or directly AGPL code into the project makes it a proprietary product. 53 -* Another is when a software uses an external AGPL service via network. 54 - * If the AGPL service is not essential and an optional extension to the software, then it not considered a derivative work. 55 - * If the AGPL service is an essential or even a mandatry part of the software, then it is considered a derivative work. For example, A vendor could come up with the idea to use AGPL code for his propieatary product, but out sources it into a s seaprate service assessible via network, so his software does not use the source code, but does not work with it either. The proprietary product is closely coupled to the AGPL code. This attempt to circumvent the AGPL is prevented thorugh the license. 52 +For instance, if a project directly incorporates AGPL source code or relies on an AGPL library, it must adopt the AGPL license for its entire codebase. Similarly, when software calls an external AGPL service over a network, the software is typically not a derivative work if that service is purely optional. However, if the service is essential and the software won’t function without it, even if the AGPL code is hosted externally, the software is still considered a derivative work. Attempting to “bypass” the AGPL by outsourcing essential functions in a network service will not avoid the license requirements. 56 56 57 - This ensuresthat when contributionsare made to acopyleftproject,or whencopyleftcode isdirectly reusedin anotherproject, the resulting work mustbe released underthesamecopyleftlicense. Thisprevents vendors fromincorporating copyleft codeinto proprietaryproducts, andensuresthat anyderivativeworks remain open source.In addition, copyleftlicensesrequire that the source codebemade availableto usersso that theycan modify, build, and control the software themselves.54 +In summary, this copyleft license ensures that whenever AGPL code is reused, or when contributions are made to existing copyleft code, the resulting work must remain open source. Athe also guarantees that the source code is available so users can modify, build, and control the software themselves. 58 58 59 59 **License Preferences** 60 60