"'Free software needs free documentation.' With this preamble, the Free Software Foundation released the GNU Free Documentation License (FDL) in March 2000. Even with a revision in November 2002, the license has had mixed reviews in the free and open source communities, especially when compared to the widespread enthusiasm for the GNU General Public License (GPL). Some accept the FDL with a few reservations, while others reject it as not being free enough. Both attitudes seem likely to persist at least until the license's next revision.
"Just as a software license defines how you can use source code and under what circumstances, so the FDL defines how you can use a document..."
