The GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free documentation, designed by the Free Software Foundation (FSF) for the GNU Project. It is similar to the GNU General Public License, giving readers the rights to copy, redistribute, and modify a work and requires all copies and derivatives to be available under the same license. Copies may also be sold commercially, but, if produced in larger quantities (greater than 100), the original document or source code must be made available to the work's recipient.
The GFDL was designed for manuals, textbooks, other reference and instructional materials, and documentation which often accompanies GNU software. However, it can be used for any text-based work, regardless of subject matter. For example, the free online encyclopedia Wikipedia used to use the GFDL for all of its text.
Read more about GNU Free Documentation License: History, Conditions, Enforcement, Criticism, Other Free Content Licenses, List of Projects That Use The GFDL
Famous quotes containing the words free and/or license:
“Let those who desire a secure homeland conquer it. Let those who do not conquer it live under the whip and in exile, watched over like wild animals, cast from one country to another, concealing the death of their souls with a beggar’s smile from the scorn of free men.”
—José Martí (1853–1895)
“My attitude toward punctuation is that it ought to be as conventional as possible. The game of golf would lose a good deal if croquet mallets and billiard cues were allowed on the putting green. You ought to be able to show that you can do it a good deal better than anyone else with the regular tools before you have a license to bring in your own improvements.”
—Ernest Hemingway (1899–1961)