Object Flow

An object flow on an activity diagram represents the relationship between an activity and the object that creates it (as an output) or uses it (as an input).

Rational Rose draws object flows as dashed arrows rather than solid arrows to distinguish them from ordinary transitions. Object flows look identical to dependencies that appear on other diagram types.

You do not need a transition if your diagram has two activities connected through an object and two corresponding object flows. The sample in Figure 51 on page 117 does not require a transition because the transition is redundant.

Figure 51 Object Flow Sample