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What is the difference between permissive and copyleft licenses?
Under a copyleft license, users must do these things under the same license as the original software. They cannot, for example, take a GPL-licensed piece of software and release it under a proprietary license. By contrast, permissive licenses do not restrict the licenses under which these acts can be done.
What is true for permissive FOSS license?
Permissive vs. In general, permissive licenses only require users to include two things in any redistribution of the licensed software: the original copyright notice and a copy of the license text. Copyleft licenses have this condition as well.
What is permissive license?
A permissive software license, sometimes also called BSD-like or BSD-style license, is a free-software license with only minimal restrictions on how the software can be used, modified, and redistributed, usually including a warranty disclaimer.
What is a strong copyleft license?
Copyleft licences are broadly divided into two ‘strengths’: strong and weak. Strong copyleft conditions dictate that when a piece of software contains some of your code, the software as a whole must be distributed under your licence, if it is distributed at all.
Which is the most restrictive license?
One of the most common restrictive licenses is the GNU GPL (General Public License). Its cousin, the AGPL (Affero General Public License), is also becoming more popular, as it closes the SaaS loophole found in the GPL.
What’s the difference between a copyleft and a permissive license?
Both copyleft and permissive licenses license allow users to freely copy, distribute, and change the software that use them. To this extent, both are considered free licenses. The main difference — and the source of the debate — is the conditions under which users of the software can do these things.
Which is the best copyleft license for software?
For example, for software libraries, the FSF suggests using the Lesser GPL, which is often described as a weak copyleft license, because it allows interaction with proprietary software.
Is the GPL a free or permissive license?
Calling for an end to “GPL purism,” and dismissing the GPL as “not a free license,” the site calls on readers to use permissive licenses instead, describing them as “truly OSS [Open Source Software] licenses and urging readers to “Join the Fight!” Occupy GPL! itself is unlikely to have a future.
Why do so many people want to use copyleft?
Copyleft supporters are concerned with ensuring that their work remains available to everyone. Many, too, prefer not to see someone else profit from their efforts, a few going so far as to refer to proprietary licensing as exploitive and ethically or morally wrong.