Knowledge Tree
Relations (1)
related 2.00 — strongly supporting 3 facts
Copyleft is a legal mechanism that utilizes [1] to ensure software remains free, effectively flipping the traditional purpose of [2]. While copyleft relies on [2] to function, it is noted that its application differs from other fields where [3] may not provide the same level of protection.
Facts (3)
Sources
Open-source license - Wikipedia en.wikipedia.org 1 fact
quoteRichard Stallman stated that "the central idea of copyleft is to use copyright law, but flip it over to serve the opposite of its usual purpose: instead of a means of privatizing software, [copyright] becomes a means of keeping software free."
Open Source Software: What is OSS? - Sonatype sonatype.com 1 fact
claimCopyleft is a method of using copyright law to require that software code and any derivatives built upon it be freely shared.
Open Hardware Licenses - P2P Foundation Wiki wiki.p2pfoundation.net 1 fact
claimCopyleft licenses like the GNU General Public License (GPL) and the Creative Commons Attribution-ShareAlike License (BY-SA) are popular in the field of free and open hardware, but they function differently than in software because hardware is generally not protected by copyright law.