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Last modified by chrisby on 2025/01/11 10:03
From version 2.114
edited by chrisby
on 2025/01/08 13:36
Change comment: There is no comment for this version
To version 2.113
edited by chrisby
on 2025/01/08 13:35
Change comment: There is no comment for this version

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58 58  
59 59  This copyleft license ensures that when contributions are made to a copyleft project, or when copylefted code is reused directly 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 on rso that they can modify, build, and control the software themselves.
60 60  
61 +he FSF primarily advocates copyleft licenses like the AGPL, which ensure that any derivative works of AGPL-licensed software remain under the same license. Although “derivative work” is a legally ambiguous term, a common view is that any software relying on AGPL code to function is a derivative work. For example, if a project directly includes AGPL source code or depends on an AGPL library, it must also adopt the AGPL—preventing it from being proprietary.
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63 +A similar principle applies if software relies on an external AGPL service over a network. If that service is optional, the software is typically not considered a derivative work. However, if the service is essential and the software cannot function without it—even if it’s hosted elsewhere—the software is still considered a derivative work. These copyleft requirements ensure that modifications and enhancements remain open and that users can access, modify, and build upon the source code.
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61 61  **License Preferences**
62 62  
63 63  The OSI aims to maximize the contributions and impact of open source by being open to all open source licenses. Permissive licenses have become very popular in recent years, especially in commercial contexts, but the OSI is open to choosing copyleft licenses if developers want to ensure that derivative works remain open and free. The FSF, on the other hand, tolerates all open source licenses, but has a strong preference for copyleft licenses, believing that all software should be protected in this way.