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Both the UML use cases and the ODP community concept can be used to capture business requirements.

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The similarities and differences are summarized in Table 4.2-1 below.

ODP community concept

Use case concept

Community contract

None

Community Objective

Use Case purpose

Role (of a User)

Actor

Role (of a System)

System

Community Behavior

  • A set of actions performed by a System Role (in response to User Role invocations)
  • A Service offered by the System

Use Case

Policies

None

Enterprise Object

  • Fulfills a role in a community
  • Supports community behavior, e.g., artifact created/exchanged/used by user/system

None

Table 4.2-1 ODP Community concept and Use Case models – High Level Comparison

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  • A Domain Analysis Model (information viewpoint/CIM cell), through the information artifacts used and exchanged between roles in the community
  • Service interfaces and Service role/relationships (computational viewpoint/CIM)), via community roles
  • Collaboration specifications (computational viewpoint/PIM cell), via community roles and interactions, as for example shown in Figure 4.1-1.
  • PIM service interfaces (computational/PIM cell), through services offered by community roles filled by systems and identified, for example, as part of the UML analysis and design as discussed in section 3.2 - Use Case Realization.

It is through this traceability mechanism that each of the detailed use cases can be subsequently linked to the NCI Enterprise Services. A UML diagram outlining relationships between use case and community modeling concepts is found on the main page of this report.

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