Tool Mentor: Structuring the Use-Case Model Using Rational Rose
Purpose
This tool mentor describes how to use Rational Rose to document
relationships between actors and between use cases.
This section provides links to additional information related to this tool mentor.
Overview
The following is a summary of the steps you perform to document
relationships between actors and between use cases:
-
Document actor-generalizations
- Document
include-relationships between use cases
- Document
extend-relationships between use cases
- Document
use-case-generalizations
For detailed information about use-case diagrams, see:
1. Document
actor-generalizations
You can insert a generalization relationship between one business
actor and another business actor in a use-case diagram by using the
Generalization drawing tool from the use-case diagram toolbox. Once
you've created the relationship, you can describe it by adding text
to the documentation field of the Generalize Specification dialog.
2. Document
include-relationships between use cases
To create an includes relationship between two use cases in a use-case diagram, you first create
a dependency between the two use
cases, then assign an includes stereotype to the dependency. You use
the includes stereotype when one use case employs the functionality
of another use case. The use case being used typically contains
functionality that a number of other use cases may need or want.
Once you have created the dependency between use cases, you can describe the relationship by adding text to the Documentation field
of the Dependency Specification.
3. Document
extend-relationships between use cases
To create an extends relationship between two use cases in a use-case
diagram, you first create a dependency between the two use cases,
then assign an extends stereotype to the dependency. You use the
extends stereotype to express optional or conditional behavior for a
use case.
Once you have created the association between use cases, you can:
describe the relationship by adding text to the Documentation field
of the Dependency Specification.
4. Document use-case
generalizations
You can create a generalization relationship from one business use
case to another use case when one use case provides common
functionality (for example, when you have an abstract use case that
provides common functionality to concrete use cases).
Once you have created a generalization relationship between use
cases, you can describe the relationship by adding text to the
Documentation field of the Generalization Specification.
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