Derivative work - Wikipedia, the free encyclopedia - 0 views
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Caitlyn Reedy on 26 Oct 09"Copyright infringement liability for a later work arises only if the later work embodies a substantial amount of protected expression taken from the earlier, underlying work. The later work must take enough protected expression (it does not matter how much unprotected material is taken, for the latter is open to the public) for the later work to be "substantially similar" to the earlier work."