PublicDomain is the state of a work whose CopyRight has either expired or explicitly waived by the author or copyright holder.

Links:
* [http://web.archive.org/web/20051216023621/http://www.ethicalpublicdomain.org/index.php/EPD/MakeExplicit Norm Megill on practical problems of Public Domain]

See also: PrimarilyPublicDomain