44
Menurut
Booch,
et
al.
(2007,
p.592)
association
adalah “A
relationship denoting a semantic connection between two
classes.”
2. Generalization
Menurut
Booch,
et
al. (2007, p.59)
generalization
dipakai
untuk
menunjukkan,
“Inheritance
thus implies a
generalization/specialization hierarchy, wherein a subclass
specializes the more general structure
or
behavior
of
its
superclasses.”
3. Aggregation
Menurut Booch, et al. (2007, p.592 ) aggregation adalah,
“A
whole/part relationship where one object is composed of one
or more other objects, each of which is considered a part of
the whole.”
4. Composition
Menurut
Booch,
et
al.
(2007,
p.593)
composition adalah,
“A
whole/part relationship where one object is composed of one
or more other objects, each of which is considered a part of
the whole. This relationship
is
a
strong form of aggregation
in
that
the
lifetimes
of
the
whole
and
its
parts
are
dependent.”
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