Substantial Similarity:The standard used to determine whether one work infringes the copyright of another, based on an assessment of the degree of similarity between the two works.
Abstraction-Filtration-Comparison Test: A three-step analysis used to determine substantial similarity, which involves abstracting the unprotected elements of a work, filtering out the unprotected elements, and then comparing the remaining protected expression.
Derivative Work:A work based upon one or more preexisting works, such as a translation, musical arrangement, dramatization, fictionalization, motion picture version, sound recording, art reproduction, abridgment, condensation, or any other form in which a work may be recast, transformed, or adapted.