<?xml version="1.0" ?>
<!-- $Id$ -->
<notes>
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.
<h2>Diagram</h2>
<img src="uml-71.gif" alt="UML User Guide: Figure 7-1, p. 102" />
<h2>Diagram Source Code</h2>
<fmtcode ext="pic">
# 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
</fmtcode>
</notes>
