The user can use business system defaults to define a field or special edit pattern for the entire model. These edit patterns are assigned a unique name and are available for any screen in the specified business system.
Special edit patterns can format system fields which are either derived from system information or used to display status information. These fields include scroll amounts and indicators, system timestamp, and other system values.
Field edit patterns format variables contained within the views, which are mapped onto the screen. The variables may be values from a supplied work set, but they are still variables within the view. Being provided as part of the IEF_Supplied group does not make them system variables. Also, some system variables (such as the command field) are copied into IEF_Supplied variables which can be used in the view, but when placed on the screen are placed as system fields.
Generally, named edit patterns are a means to define a common picture format for different types of data fields. If a consistent format is desired for a date or time, for example, then the edit pattern can be defined as a business system default and given a name to uniquely identify it. This named edit pattern is then added to the choices of edit patterns that are presented to the user when a field is placed on the screen in the screen designer.
Also, named edit patterns allow you to implement changes more easily. If it is necessary to alter the standard presentation format of some particular data item, and named edit patterns are used, only the definition in the business system defaults needs to be changed.
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