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The EventHandlerWithFieldConversion pattern performs the conversion from the external representation of the WebInput fields (the field values as seen by the user) to the internal representation (the values stored in the database). If a FLD displayed as FLD triple is specified for a field, the associated conversion function specified by the ...input FNC continuation triple is called.
When the EventHandlerWithFieldConversion pattern is used, remember to add the target field of the FLD displayed as FLD triple to the WebInput variable.
The pattern also calls functions denoted by the FLD computed by FNC triple to initialize field values.
Online documentation - Websydian v6.5