UML (Uniform Modeling Language) model, 636–656
activity diagram for, 649–650
collaboration diagram for, 652–653
component diagram for, 653–654
customizing shapes in, 641
deployment diagram for, 654–655
extending, 656
Model Explorer for, 637–640
overview of, 636–637
sequence diagram for, 647–649
starting steps in, 641–643
statechart diagram for, 650–652
static structure diagram for, 645–647
use case diagram for, 643–645
Union command, 722–723
Usability, 4
Use case diagram for UML model, 643–645