1. The Data Definition Language ( DDL ) manages table and index structure. 2. These repositories all use the NDAR GUID as well as common data definitions . 3. ESE also extends transaction semantics from data manipulation operations to data definition operations. 4. It is responsible for creating and updating the DoDTR data definitions and business rules. 5. Using these data definitions , a range of software validation checks can be carried out. 6. These teams frequently used internal data definitions that were incompatible with other computer systems. 7. Data definition operations supported in this fashion include AddColumn, DeleteColumn, CreateIndex, DeleteIndex, CreateTable and DeleteTable.8. During systems design, therefore, data definitions are established which place limits on what constitutes valid data. 9. Thus a macro might generate numerous assembly language instructions or data definitions , based on the macro arguments. 10. Passing customized data types or objects requires both components to have knowledge of the custom data definition .
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