16.4 Diagrams

*Graphis Nodes

    The graphic nodes that can be included in structural diagrams are shown in Table 16.1 .

Table 16.1 - Graphic nodes included in use case diagrams

Node Type	Notation	Reference
Actor (default)	Customer	See Actor (from UseCases ) on page 612.
Actor (optional user-defined icon example)
Extend	Perform ATM Transaction «extend» extension points Selection extended (use case) extending (use case)	See Extend (from UseCases ) on page 615.
Extend (with Condition)	«extend» Condition: {customer selected HELP} extension point: Selection

   Table 16.1 - Graphic nodes included in use case diagrams Table 16.1 - Graphic nodes included in use case diagrams

Node Type	Notation	Reference
ExtensionPoint	extension points Selection extension point	See ExtensionPoint (from UseCases ) on page 617.
	extension points order created : in Created state order shipped : in Shipped state OrderStationery extension point
Include	Withdraw Card Identification «include» including use case included use case	See Include (from UseCases ) on page 619.

Node Type UseCase	Notation	Reference
Withdraw	See UseCase (from UseCases ) on page 620.
On-Line Help
Perform ATM Transaction extension points Selection
OrderStationery

*Examples

   use case

   Telephone Catalog

   Check Status

   

Salesperson

   actor

   Customer

   Fill Orders

   subject

   Establish Credit

   Supervisor

   Figure 16.10 - UseCase diagram with a rectangle representing the boundary of the subject

    The use case diagram in Figure 16.10 shows a set of use cases used by four actors of a physical system that is the subject of those use cases. The subject can be optionally represented by a rectangle as shown in this example. Figure 16.11 illustrates a package that owns a set of use cases.Note – A use case may be owned either by a package or by a classifier (typically the classifier specifying the subject).

   package ATMtopPkg

   1

   Administrator