An extend use case can change any aspect of the base use case and in several places. Look at it this way; if I use MSWord to open the base use case, turn on track-changes and then edit it to represent changes I want to make usually but not limited to additional functionality the extending use case represents those tracked changes. Include usecase is shared can be resuse but extend class relationship can't shared or reuse. Post New Answer. Answers were Sorted based on User's Feedback Difference: 'uses', 'extends', 'includes'..
To rename a drawing, double-click to select the default name such as Drawing1 at the top of the drawing and then type a new name over it. In the dialog box, select the blank template. Under Template Categories , click Software and Database. In the tree view, right-click the package or subsystem in which you want to include a use case diagram, then point to New , and then click Use Case Diagram. An icon representing the diagram is added to the tree view. To indicate a System Boundary in a use case diagram.
Drag Use Case shapes from the Use Case stencil and place them inside the system boundary, and then drag Actor shapes to the outside of the system boundary. Use Communicates shapes to indicate relationships between use cases and actors.
To indicate a relationship between an actor and a use case. Glue one endpoint of the Communicates shape to a connection point on an Actor shape. Double-click the Communicates shape, then, under Association , click the end you want to edit, and then click Properties. Right-click the Communicates shape and click Shape Display Options. Under End options , select End navigability , and then click OK.
Use Uses and Extends shapes to indicate the relationships between use cases. To indicate a uses relationship between two use cases. In a use case diagram, drag a Uses relationship shape onto the drawing page. Glue the Uses endpoint without an arrowhead to a connection point on the Use Case shape that uses the behavior of the other use case. Glue the Uses endpoint with an arrowhead to a connection point on the use case being used.
Add property values, and then click OK. To indicate an extends relationship between two use cases. Glue the Extends endpoint without an arrowhead to a connection point on the use case providing the extension. Glue the Extends endpoint with an arrowhead to a connection point on the base use case. Add the property values, and then click OK.
Double-click any shape except the System Boundary shape to open its UML Properties dialog box where you can add a name, attributes, operations, and other property values. In the tree view, right-click the package or subsystem in which you want to include a use case diagram, point to New , and then click Use Case Diagram.
To indicate a system boundary in a use case diagram. Network, software, database. Create a UML use case diagram. Defining the system boundary determines what is considered external or internal to the system. An association illustrates the participation of the actor in the use case. Create a new use case diagram On the File tab, point to New. Select Create. Add a subsystem to the use case diagram Drag a Subsystem shape onto the drawing page. A number of other UML sources define abstract use case as including use case, while in fact it has to be the other way around: including use case is abstract use case.
See discussion of the definition of abstract use cases. Include relationship between use cases is shown by a dashed arrow with an open arrowhead from the including base use case to the included common part use case. The arrow is labeled with the keyword «include». Large and complex Checkout use case has several use cases extracted, each smaller use case describing some logical unit of behavior. Note, that including Checkout use case becomes incomplete by itself and requires included use cases to be complete.
This site received many requests related to which use case relationship should be used in which situation. I combined several key points from UML 2. Also, take a look at related discussion in the next paragraph. I was baffled while creating some use case diagrams and answering some questions of this website users, all with a similar problem and no obvious solution using UML 2.
0コメント