Creating interaction operators

Interaction operators, which are included in UML 2.0, are used to group related elements in a sequence diagram. This includes the option of defining specific conditions under which each group of elements is to occur.

About this task

Each interaction operator has a type, which determines its behavior, for example Opt, Par, or Loop.

In addition, interaction operators can include a guard to specify specific conditions under which the path is to take.

Interaction operators can be nested where necessary.

To add an interaction operator to a diagram:

1. Click the Interaction Operator button on Diagram Tools.
2. Click the canvas for a default-size interaction operator, or click and drag to draw an interaction operator of a specific size.