| http://www.w3.org/ns/prov#value | - The GNU General Public License (GPL), developed by Richard Stallman at MIT in the 1980s is an example of such license. ???The GNU Free Documentation License is a form of copyleft intended for use on a manual, textbook or other document to assure everyone the effective freedom to copy and redistribute it, with or without modifications, either commercially or non-commercially.??? [3] The GPL allow w
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