Knowledge Tree
Relations (1)
related 3.46 — strongly supporting 10 facts
Copyleft is a licensing mechanism that mandates the availability and distribution of source code for derivative works, as established in [1], [2], and [3]. This relationship is further defined by the requirement that any modifications to the original source code must be disclosed under the same license terms, as detailed in [4], [5], and [6].
Facts (10)
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 require derivative works to be distributed with the source code and under a similar license.
What Is Open Source Software? - IBM ibm.com 2 facts
claimThe GNU General Public License (GPL), innovated by Richard Stallman, is the first copyleft software license and requires that anyone who enhances the source code must publish their edited version freely to all.
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 Is Open Source Software Licensing? - Coursera coursera.org 2 facts
claimCopyleft licenses require users to make source code available, including any modifications made to the original software.
claimThe GNU General Public License is a strong copyleft license that requires users to distribute source code, including any modifications, under the original license terms.
What is OSS? - CircleCI circleci.com 2 facts
referenceThe GPL and EUPL licenses are classified as copyleft and require source code viewing, while the AGPLv3 is also classified as copyleft and requires source code viewing. The M.I.T. and Apache licenses are classified as non-copyleft and do not require source code viewing, and the Mozilla Public License (MPL) is classified as quasi-copyleft and does not require source code viewing.
claimCopyleft licenses require the attachment of license text and the disclosure of modified source code, ensuring that any modified or extended versions of the program remain free.
Legal aspects of Open Source Software: What makes it different ... en.havelpartners.blog 1 fact
claimCopyleft licenses can be restrictive for commercial entities because the requirement to make the source code of all modifications available often conflicts with business strategies and intellectual property protection.
Understanding Open-source Licenses: Key factors to Consider leanix.net 1 fact
claimCopyleft licenses, also known as "viral" licenses, require that if a user modifies open-source software and distributes the modified version, the user must also distribute the source code of those modifications under the same license.