Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] idempotence identity projection implementation versus model IMS Information Principle, The 2nd 3rd 4th 5th INSERT expansion instantiation 2nd intended interpretation intension intersect 2nd INTERSECT irreducibility key relvar IS_EMPTY 2nd isolation 2nd |