In a sequence diagram, is it possibly to have multiple hnotes at the same vertical level?

Question

I would like a separate hnote over each participant in a sequence diagram, to define the initial states of each participant.  Is it possible to have these at the same vertical level?

Answer 1

I'm interested with same functionality, is there any answer for it?

Answer 2

Unfortunatly, this is not possible today.

However, we may add this new feature in some future.
About the syntax, we are think about using an initial character (like / ) that would suggest to
the layout engine to not break the line.

This would allow:

@startuml
note over Alice : initial state of Alice
/ note over Bob : initial state of Alice
Bob -> Alice : hello
@enduml

This syntax seems flexible enough to allow simultaneous messaging:
@startuml
Alice -> Bob : hello
/ Bob -> Caty : hello also
@enduml

However, those modifications require some refactoring of the layout engine (especially the last one).
We will post a news here when multiples note will be working.

Any sugestion about the syntax ?

Thanks
 

Answer 3

This has been implemented in V7973 :

@startuml
note over Alice : initial state of Alice
/ note over Bob : initial state of Bob
Bob -> Alice : hello
@enduml

 

Comments

I'm using the sequence diagrams to model event-based systems, where a single event can go to multiple recipients / threads. This would benefit much from the possibility of simultaneous messaging.

Would it be a feasible addition anytime soon?

Regards, Ville