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Existing Movements
Free Art[edit]
There is no Free Art Definition, but the Free Art License is in the spirit of this definition.
Free Software[edit]
Cf. the Free Software Definition.
Internet Engineering Task Force[edit]
The Internet Engineering Task Force (IETF), which is the body governing the drafting and evolution of Internet protocols - without which the Internet, an unified interconnection of physically disparate networks, couldn't even exist -, has rules concerning the rights that are granted on its published documents. Although a subtle restriction on derivative works makes some of these documents not completely free, it is a good example of how Free Content's essential freedoms can be fruitfully applied to promote scientific and technical progress.
Open Knowledge[edit]
Cf. the Open Knowledge Definition.
Open Source[edit]
Cf. the Open Source Definition, but note the philosophical differences to the Free Software movement; also note that the term is, in spite of its definition, somewhat diluted, especially in contexts other than software.
Free/Libre Knowledge[edit]
Libre Knowledge is championed by Libre.org and others such as the Free Knowledge Institute.