copyleft
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AI overview
Copyleft is a licensing approach that uses copyright law to ensure software (or other creative works) remains free and open for others to use, modify, and share. It matters because it creates a legal framework that prevents people from taking these freely available works and turning them into proprietary products, keeping them accessible to everyone.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Symbol.mark
- ©
- Symbol.name
- Copyleft symbol
- Symbol.unicode
- 🄯
via Wikipedia infobox
Article
17 sectionsContents
- History
- Copyleft principles
- Freedom
- Reciprocity
- Economic incentive
- Copyleft application
- Types and relation to other licenses
- Strong and weak copyleft
- Full and partial copyleft
- Share-alike
- Permissive licenses
- Debate and controversy
- "Viral" licensing
- Symbol
- See also
- References
- External links
265px|thumb|alt=Capital letter C flipped around its vertical axis, surrounded by a single line forming a circle.|Copyleft symbol
Copyleft is the legal technique of granting certain freedoms over copies of copyrighted works with the requirement that the same rights be preserved in derivative works. In this sense, freedoms refers to the use of the work for any purpose, and the ability to modify, copy, share, and redistribute the work, with or without a fee. Licenses which implement copyleft can be used to maintain copyright conditions for works ranging from computer software, to documents, art, and scientific discoveries. Similar approaches have been applied to certain patents.