Sunday, February 8, 2009

Criticism Main article: Copyleft A subset of free licenses are sometimes referred to as viral copyright licenses, this applies to licences that

Criticism

A subset of free licenses are sometimes referred to as viral copyright licenses, this applies to licences that contain a clause stating that any works derived from a free work must themselves be free when distributed, usually under the same licence. This requirement is criticized as legally constraining and therefore rendering the use of the "free" appellation inappropriate.

An example of one of these "viral licences" is the GNU General Public Licence, which is often applied to computer programs. The viral nature of these licences are seen as applying the ideology of the original licensor on subsequent redistributors.


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