Chapter 12 you may have noted the information required to rate the stories sent by contributors. Figure 15-1 shows the meta data model of the database needed for rate calculation and meta model update. Figure 15-1: Database rate meta data. The Contracts table contains all the values we need about contributors. Depending on item type, each contract defines the amount per unit. In this way, you have a rate per unit for each item type, and in this case study you have five items for each contract.
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