Why does this become a class diagram instead of a state diagram

Question

This creates a standard horizontal/vertical state change diagram:

@startuml
Hide Empty Description
Bob --> Alice : hello
Alice --> Bob : bye
@enduml

If I want to add a description line to one of the states like this:

@startuml
Hide Empty Description
Bob --> Alice : hello
Bob : Test
Alice --> Bob : bye
@enduml

Why does it turn into a class diagram like this:

How do I force this to be a state machine diagram and not a class diagram?

Comments

Hello M.

And if you want explicitly a state machine diagram, you can add 'state' keyword as:

@startuml
Hide Empty Description
Bob -> Alice : hello
state Bob : Test
Alice -> Bob : bye
@enduml

Regards,
Th.

---

Thank you very much, that worked perfectly.

I had tried:

State Bob --> Alice : Hello

But that generated an error.

---

Hello A.,

You can not mix definition and link...

@startuml
Hide Empty Description
state Bob
Bob -> Alice : hello
Bob : Test
Alice -> Bob : bye
@enduml

Regards,
Th.

Answer 1

Hello,

Your first diagram is a sequence diagram, not a state diagram. I modify your sample with 2 proposals (click on drawing to show the code)

Comments

Thanks for the answer.