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Data Layer

NREC will implement the entities shown in Figure 3. The diagram shows the relationships (1:1, 1:M, or M:M) between the major entities of NREC's solution. The diagram also shows the tables used to store the data for each entity. For example, house information will be stored in the table called S_PROD_INT. It also shows external data being handled by the virtual business component named House Renovations.

Figure 3.  NREC Entity Relationship Diagram