SEG4110 - Topic O - Object Relational Mapping9 Inventory System Tables 3 Order-To-SupplierA po-number (key)A2, A6i supplier-id (foreign-key)A5i date-orderedA2 Supplier-Order-Line-ItemA line-item-idA6ii po-number (foreign-key)A5i product-source-id (foreign-key)A5i number-orderedA2 date-expectedA2
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