MIT Technology Review: Copyleft Hits a Snag
Dec 21, 2005, 19:00 (14 Talkback[s])
(Other stories by Michael Fitzgerald)
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"No one would confuse cyber-lawyer Lawrence Lessig with Homer
Simpson--symbol for all that is dumb about America. But Lessig, a
professor of law at Stanford University in Palo Alto, CA, has spent
a good deal of time lately trying to figure out how to resolve a
'doh!' moment of his own: realizing that the various intellectual
property licenses that he helped design over recent years to
encourage the sharing of intellectual property--a movement
collectively known as 'copyleft,' in contrast to copyright--may
actually prevent it.
"The problem is that the copyleft licenses, like the 'free
software' licenses from which they're drawn, require that
derivative works be licensed under identical terms..."