Knowledge Tree
Relations (1)
related 3.00 — strongly supporting 7 facts
Copyleft is a licensing mechanism specifically designed to prevent the conversion of open source code into proprietary software [1], [2], and it creates legal obligations that can force organizations to release proprietary software under open source terms [3]. Furthermore, copyleft licenses are defined by their restrictive relationship with proprietary software, either by prohibiting its creation from derivative works [4], [5] or by offering specific integration flexibilities [6], [7].
Facts (7)
Sources
Open-source license - Wikipedia en.wikipedia.org 2 facts
claimCopyleft licenses require that derivative works include source code under a similar license, whereas permissive licenses do not, allowing the code to be used within proprietary software.
claimCopyleft licenses offer protection against proprietary software consuming code without contributing changes back to the original project.
Understanding Open-source Licenses: Key factors to Consider leanix.net 1 fact
claimThe Eclipse Public License (EPL) is categorized as a weak copyleft license, which allows for flexibility in integrating with proprietary software.
Open-source software - Wikipedia en.wikipedia.org 1 fact
claimRichard Stallman created the concept of copyleft to prevent his work from being used in proprietary software, allowing the use of his work by anyone under specific terms.
Understanding Open-Source Software Licensing - Kemp IT Law kempitlaw.com 1 fact
claimCopyleft licenses, such as GPL and LGPL, require that derivative works be released under the same license, which can potentially impact proprietary software.
What Is Open Source Software? - IBM ibm.com 1 fact
claimOpen source software creators originated 'copyleft,' a licensing mechanism that permits limitless public usage, alteration, and redistribution of source code, but prevents others from making works based on the code into proprietary, copyrighted software.
What are Open Source Licenses and How Do They Work? blackduck.com 1 fact
claimFailure to adhere to the obligations of a reciprocal (copyleft) license can result in an organization being legally obligated to release their own proprietary software under that same open source license.