This chapter describes each model element that can be created
within a use case diagram. Note that some sub-model elements of
model elements on the diagram may not actually themselves appear on
There is a close relationship between this material and
the properties tab of the details pane (see
Section 13.3, “Properties Tab”). That section covers
properties in general, in this chapter they are linked to
specific model elements.
Figure 17.1, “Typical model elements on a use case diagram.” shows a use
case diagram with all typical model elements displayed.
Figure 17.1. Typical model elements on a use case diagram.
17.1.1. ArgoUML Limitations Concerning Use Case
Use case diagrams are now well supported within
ArgoUML. There still are some minor limitations though,
especially with extension points.
Earlier versions of ArgoUML (0.9 and earlier)
implemented extend and include relationships by using a
stereotyped dependency relationship. Although such diagrams
will show correctly on the diagram, they will not link
correctly to the use cases, and should be replaced by
proper extend and include relationships using the current