Sequence Diagram - Start Vehicle Black Box and White Box

This Sequence diagram describes the interaction of the Driver starting the vehicle. It makes use of the Interaction Use element indicated by the (ref) to make reference to another Sequence diagram. The diagram is intrinsically simple but these diagram can be augmented with a number of other elements and connectors which elaborate the details of other more complex interactions.

Enterprise Architect provides a convenient mechanism allowing the modeler to click-through to the referenced diagram in this case the Start Vehicle White Box diagram.

Elements in Enterprise Architect can appear in multiple diagrams allowing for expressive narratives to be built up in a model and providing a mechanism for modelers to create multiple views of the same element. The elements on a diagram can be located in the Browser window showing their structural relationship to other parts of the model. In this case both the Black and White Box views of the Start Vehicle interaction are located as children of the Start Vehicle Use Case making it easy to relate them to each other.