Sequence Diagram Example: External Actor

The following diagram, based on Figure 7-1 appearing on p. 102 of the UML User Guide, illustrates an interaction diagram with an external actor.

Diagram

UML User Guide: Figure 7-1, p. 102

Diagram Source Code

# UML User Guide Figure 7-1.
.PS

copy "sequence.pic";

actor(A,"");
object(T,":OTaker");
object(F,":OFulfill");
step();

message(A,T,"submitOrder");
message(T,F,"placeOrder");
message(F,A,"acknowledgeOrder");

step();
complete(A);
complete(T);
complete(F);

.PE

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