47
The
endpoints
of
the
message
icons
connect
with
the
vertical
lines
that connect with the entities at the top of the diagram. Messages are
drawn from the sender to the receiver.”
Gambar 2.17 Message
Gambar 2.18 Return Message
Gambar 2.19 Self-call
3. Destruction Events
Menurut
Booch,
et
al.
(2007,p.208),
”A
destruction
event
indicates
when
an
object
is
destroyed.
It
is
shown
as
an
X
at
the
end
of
a
lifeline”.
Gambar 2.20 Destruction Events
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