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Copyleft is a distinguishing feature of some free software licenses, while other free-software licenses are not copyleft licenses because they do not require the licensee to distribute derivative works under the same license. There is an ongoing debate as to which class of license provides the greater degree of freedom.
The Server Side Public License (SSPL) is a source-available copyleft software license introduced by MongoDB Inc. in 2018. [2] [3]It includes most of the text and provisions of the GNU Affero General Public License version 3 (AGPL v3), [4] but modifies its provisions for software that is conveyed over a network—requiring that anyone who offers the functionality of SSPL-licensed software to ...
The most well known free software license that uses strong copyleft is the GNU General Public License. Free software licenses that use "weak" copyleft include the GNU Lesser General Public License and the Mozilla Public License. Examples of non-copyleft free software licenses include the X11 license, Apache license and the BSD licenses.
Note: this category differs substantially from Category:Free and open-source software licenses in that it is not limited to software, and not all free software licenses are copyleft (some are permissive, like those of BSD and MIT).
License compatibility is a legal framework that allows for pieces of software with different software licenses to be distributed together. The need for such a framework arises because the different licenses can contain contradictory requirements, rendering it impossible to legally combine source code from separately-licensed software in order to create and publish a new program.
Pages in category "Copyleft software licenses" ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; ...
Open-source record labels are record labels that release music under copyleft licenses, that is, licenses that allow free redistribution and may allow free modification of the tracks. They present free, libre , and open content , and present this a part of the freedoms of expression and speech , with the goal of opening up the possibilities of ...
For instance, copyleft licenses impose a duty on licensees to share their modifications to the work with the user or copy owner under some circumstances. No such duty would apply had the software in question been in the public domain .