In the second step, a design is created to meet the needs that have been identified. During the actual design process, information begins to fall into groups of related data that can be incorporated by the DBA into dictionary elements, records, schemas, subschemas, and logical records. At the same time, activities combine into predictable functions (for example, update, modify, delete) that logically work together and begin to form a step-by-step design.
When developing a design, the application and development group must consider the external/functional specifications and the internal/technical specifications. The external/functional specifications reflect the user's view of the application, indicating what functions will be performed by the application; the internal/technical specifications reflect the developer's view of the application, indicating how the application will operate. Each of these considerations is discussed separately below.
For the purposes of this manual, the discussion of the specifications assumes that the database has already been designed and that subschema views and other site-specific information have been obtained from the DBA.
|
Copyright © 2013 CA.
All rights reserved.
|
|