As a prototyping tool, ADSA enables the user to have an online preview of what the application looks like and what it can do. These walk-throughs can begin at an early stage in the design, before any process code needs to be written. To compile a prototype and create the appropriate load modules, ADSA only needs the dictionary definitions of any global records associated with an application; if no global records are specified, then no other definitions are necessary. To execute a prototype, only rudimentary dialogs and maps are required. Prototypes are readily modified and, therefore, can respond quickly to the needs of the user as the application design is being developed. Once the final design is approved, the existing prototype is enhanced with the requisite dialog code, and the completed application can be executed.
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