CODEWITHSUNDEEP
umlsequencediagramsequence-diagram
steame
steame

Reputation: 61

Is there any difference between these response messages in sequence diagram

Is there any difference between the response messages in the following sequence diagrams?

enter image description here

enter image description here

Moreover: Should a sequence diagram be accurate in exposing actors' messages or could it abstract from certain problems which could make the diagram more complex?

More specifically: could a return message be like the one shown here, where it summarises what another piece of the diagram should show instead?

Upvotes: 0

Views: 1569

Answers (1)

qwerty_so
qwerty_so

Reputation: 36313

The rectangles on the life lines show activity of the object. So in the first diagram the object will have some pause between receipt and reply while in the lower one it's straight busy. That might or might not be interesting and depends on the context where you show that diagram.

You can send messages from actor (instances) which is ok to show where the message comes from. It will be obvious that the actor is not really sending the message but it will come from some (unspecific) object being triggered by the actor. However, the way the message is rendered is not ok. Either you let it come of the actor's rectangle below or you let it start completele from mesage endpoint (black bullet).

Upvotes: 2

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