Object-Oriented Design. CIS 375 Bruce R. Maxim UM-Dearborn. OOA and OOD. OO Design Layers. Responsibility layer (highest layer) contains data structure detail and algorithmic detail for each object's attributes and operations Message layer defines system interfaces (internal and external)
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Bruce R. Maxim
Support inter-object communicationSpecifying Operations
Attribute data (type/structure).
External input to object.
External output from object.
(0:1, 1:1, 0:many, 1:many)
Operation interface description.
Operation processing description.
Restriction and limitations.
Message connections.Object Specification