148 Internet of Things
The given diagram above can help us to use UML to explain the dynamic nature of a system,
the structural allocation, and interaction between the objects. The given diagram has a start and
end point, similar to any other activity diagram. Then, on the top-level view, you will be able
to see the interactions and interactions utilities by the use of rectangular boxes. This diagram
works as complete stand-alone sequence diagram that consists of the three main actors: the
inspector, the assistant, and the middleware reporting system. Once the sequence of actions is
executed, the flow state arms out and either reciprocates the last interaction or turns on into a
new interaction and then completes the flow.
TIMING DIAGRAM
These diagrams are utilized to portray the relations among the objects when the center of attention
rests with time. However, we don’t have any interest in how the objects interact or can change each
other. Instead, we would like to portray how the objects and actors can act together with a linear
time axis. In this, a lifeline will be used to represent each individual participant. This line will be
responsible for forming steps as the individual participants will be transiting from one state to
another. The time duration of events and the changes took place will have the main focus.
0102030405060708090 100 110 120 130 140 150 160 170 180 190
{d..d*3}
{d..d*3}
OK {t..t+3}
Wait Access
UserAccount systemUser Account Accepted
Code
Wait Card
ldle
Start
No Card
Has Card
ldle ldle
WaitCard
Wait
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Internet_of_Things_CH06_pp141-170.indd 148 9/3/2019 10:14:18 AM
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