umlsequence-diagramvisual-paradigm
Is it legal a sequence diagram without lifeline?
i've my project and this is my Sequence Diagram.
Is it legal?
Can i start my sequence diagram like that?
Solution
The first message on the left is a found message (see §17.4.4.1 page 577 of formal/2017-12-05) and its use is perfectly legal.
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