Initial and final nodes
start is the initial node, a filled circle. stop is the activity final, a bull’s-eye, ending the whole activity.
end is the flow final, a circled X, ending only its own flow.
diagram activity "Control nodes"
start
fork {
action "Audit"
end
} and {
action "Respond"
}
stop
Syntax
start
stop
end
start must be first in the flow. Statements after stop or end are unreachable and an error.
Specification
UML 2.5.1, 15.3.4 (p. 391).