In our third installment on UML we'll show you how to use sequence diagrams ... a message to itself using a reflexive message, which the message marked as 2 in the diagram in Figure A illustrates.

Class and sequence diagrams ... an example of the UML that simulates the standard Java event-handling mechanism. When developing Java applications, it’s quite common to use a pattern similar ...

Specific usage scenarios are easy for users to describeand to use to form good acceptance tests. Figure 2 shows aparticular scenario, described using a UML sequence diagram. When anew heart rate is ...