Prior art is a concept in patent law used to determine the patentability of an invention, in particular whether an invention meets the novelty and the inventive step or non-obviousness criteria for patentability.
Background is a 1953 British domestic drama film dealing with the effects of divorce, directed by Daniel Birt and starring Valerie Hobson, Philip Friend and Norman Wooland.
In Schenkerian analysis, a structural level is a representation of a piece of music at a different level of abstraction, with levels typically including foreground, middleground, and background.
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