Definition[edit | edit source]
A Commons Attribution-ShareAlike license (CC-BY-SA) allows others to remix, tweak, and build upon the licensor's work even for commercial purposes, as long as they credit the licensor and license their new creations under the identical terms.
Overview[edit | edit source]
This license is often compared to "copyleft" free and open source software licenses. All new works based on the licensor's will carry the same license, so any derivatives will also allow commercial use. This is the license used by Wikipedia, and is recommended for materials that would benefit from incorporating content from Wikipedia and similarly licensed projects.