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A community model can be represented with different levels of detail to reflect different levels of detail in use cases, as shown in Table 3.1-1. The "Community detail" and "UML diagrams" columns in the table provide a mapping from the use case levels to community modeling concepts and the associated UML for ODP notation.

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This model can be further refined by adding the high-level interaction called Repository Access between the user and the system (level 2), as shown in Figure 4.3-1. This level can be further refined by adding detail to the interactions, specifying types of access to the Repository, namely Query, Identify and Aggregate Data (level 3). This is also depicted in the figure.

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Figure 4.3-1 Level 2 and Level 3 Use Cases

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