46
Menurut
Booch,
et
al. (2007,
p.206),
“In
sequence
diagrams,
the
entities
of
interest
(which
are
the
same
as
for
object
diagrams)
are
written horizontally across the top of the diagram. A dashed vertical
line,
called
the
lifeline,
is
drawn
below
each
object.
These
indicate
the existence of the object.”
Object3
Gambar 2.15 Object dan lifeline
Gambar 2.16
Timeline
2. Messages
Menurut Booch, et al. (2007,pp.206-207), “Messages (which may
denote events or the invocation of operations) are shownhorizontally.
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