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LANSA SAA/CUA Overview

LANSA supports the concepts of SAA (Systems Application Architecture) and the panel design and user interaction concepts prescribed by the CUA (Common User Access) guidelines.

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It does not necessarily adhere to the recommendations made in the IBM i document "Defining AS/400 Compatible Displays using Data Description Specifications Newsletter" (GC21-8163) and other IBM i publications.

Some of the reasons for this are:

    • LANSA supports action bars, pull-downs and pop up windows.
    • LANSA supports number or cursor selection.
    • In some areas the recommendations do not conform to the SAA/CUA guidelines. For instance, messages should appear above the function key area, not below it.
    • The use of SAA/CUA standards requires a firm commitment at the corporate level.
    • The full use of SAA/CUA guidelines may meet resistance from some EDP practitioners as they may feel that in many respects the SAA/CUA guidelines are too restrictive.
    • The use of some of the features available within the SAA/CUA guidelines such as action bars, pull-downs, pop up windows and the prompt key may significantly change the way application systems are designed. Different architectural methods are generally used for SAA/CUA application systems that use these facilities.