Identity

Each type is identical to itself. Two types are identical if they originate from the same type declaration. Following example demonstrates this:

TYPE
   Rec1 = RECORD a, b: CARDINAL END;
   Rec2 = Rec1;
   Rec3 = Rec1;
   Rec4 = RECORD a, b: CARDINAL END;

Rec2 and Rec3 are identical because they are both derived from Rec1. While Rec4 has the same structure as Rec1 it is not identical to Rec1, Rec2, or Rec3.