Share-alike

The Creative Commons icon for Share-Alike, a variant of the copyleft symbol

Share-alike (🄎) is a copyright licensing term, originally used by the Creative Commons project, to describe works or licenses that require copies or adaptations of the work to be released under the same or similar license as the original.[1] Copyleft licenses are free content or free software licenses with a share-alike condition.

Two currently-supported Creative Commons licenses have the ShareAlike condition: Creative Commons Attribution-ShareAlike (a copyleft, free content license) and Creative Commons Attribution-NonCommercial-ShareAlike (a proprietary license).

The term has also been used outside copyright law to refer to a similar plan for patent licensing.[2]

  1. ^ "Glossary". Archived from the original on 2012-02-22. Retrieved 2012-03-05.{{cite web}}: CS1 maint: unfit URL (link)
  2. ^ Davis, Ian (2011-08-08). "Share-Alike Patents". Archived from the original on 2012-04-03. Retrieved 2012-03-05.