Artistic License

A software license used for certain free software packages, most notably the standard Perl implementation.

While most in the free software community recognise it as a free software license (as do most proponents of the alternative term open source software), it is often heavily criticised for being ambiguous, self-contradictory, and thus virtually impossible to interpret.

The text of the license is available at http://www.perl.com/pub/a/language/misc/Artistic.html