Chapter 5: Object Interaction
	Text Box		Adds a text box to the diagram.
	Note		Adds a note to the diagram.
	Anchor Note to Item		Connects a note to an item in the diagram.
	Object		Adds a new object to the diagram.
	Object Message		Draws a message between two objects.
	Message to Self		Draws a reflexive message.
	Return Message		Shows a return from a procedure call.
	Destruction Marker		Shows when an object is destroyed.
	Procedure Call		Draws a procedure call between two objects.
	Asynchronous Message		Draws an asynchronous message between two objects.

Collaboration Diagrams

Like Sequence diagrams, Collaboration diagrams are used to show the flow through a specific scenario of a use case. While Sequence diagrams are ordered by time, Collaboration diagrams focus more on the relationships between the objects. Figure 5.4 is the Collaboration diagram for John Doe purchasing a ticket for flight #1020.

Figure 5.4: Collaboration diagram for John purchasing a ticket

As you can see, the information that was in the Sequence diagram in Figure 5.3 is still here in the Collaboration diagram, but this diagram gives us a different view of the flow. In this diagram, it's easier to see the relationships between the objects. However, it's a little more difficult to see the sequencing information.

For this reason, you may want to create both a Sequence and a Collaboration diagram for a scenario. Although they serve the same purpose and contain the same information, each gives you a slightly different view. In Rose, you can create a Sequence diagram from a Collaboration diagram (or vice−versa) either by pressing F5 or selecting Browse → Create (Sequence/Collaboration) Diagram.

166