Use this field-level keyword to activate the Dup key on the display station keyboard. Press the Dup key when the cursor is in this input-capable field. This indicates that data for this field is to be duplicated from the record sent in the previous input operation. The actual duplication is the responsibility of your program (see Programming for the Dup Key for Display Files later in this section).
Refer to Appendix F, System/36 Environment Considerations Using DDS, for special considerations when specifying the DUP keyword in files that are used in the System/36 environment.
The format of the keyword is:
DUP[(response-indicator ['text'])]
You cannot specify the DUP keyword on a floating-point field (F in position 35).
You should specify a response indicator for a numeric field defined with this keyword. Hex 1Cs for numeric fields will not be returned to your buffer, but hex F0s will be returned for the remaining field positions.
Option indicators are valid for this keyword.
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