[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] refining mappings repeatable design decisions representing mapping and merging models defined example 2nd requirements gathering reuse and components and frameworks and objects at code level of mappings raising level run-time interoperability |