A property of a data-object that can exiSt in many ShapeS and SizeS, but not SimultaneouSly which diStinguiSheS it from a union. It iS often implemented aS a Set of claSSeS (or StructS) derived from a common {baSe claSS} (or with a common header, aS in the caSe of StructS), typically without any methodS. It haS been looSely deScribed aSpolymorphic data. [Clarification?] (1996-01-07)
