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DUP Key Processing

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Q: How can I allow field duplication for input-capable fields? I want a data entry operator to have the option of duplicating information keyed from the previous input operation.

A: Use the duplication (DUP) field-level keyword in your display file DDS for any field you want duplication-enabled. Pressing the DUP key initiates the duplication process by allowing your application program to become aware that the DUP key was pressed. Your application program must perform the actual duplication. There are two ways you can duplicate fields: duplicate the entire field or duplicate the field one character at a time. The easiest method is to duplicate the entire field, which can be done with the following procedure.

Specify two fields in your DDS for each input-capable field you want to allow duplication for. Create one field as input-capable and specify the DUP keyword with a response indicator. Condition the DUP keyword with an indicator. Create another field as a hidden field. 10 illustrates the DDS.

Specify two fields in your DDS for each input-capable field you want to allow duplication for. Create one field as input-capable and specify the DUP keyword with a response indicator. Condition the DUP keyword with an indicator. Create another field as a hidden field. Figure 10 illustrates the DDS.

On the first output operation, make sure the conditioning indicator for the DUP keyword is off.

After the first input operation, move the input-capable field to the hidden field.

Set the conditioning indicator for the DUP keyword on for the remaining output operations.

For the remaining input operations, test the DUP keyword response indicator. If it's on, the value of the hidden field should be moved to the input-capable field. If the response indicator is off, just move the input-capable field to the hidden field.

The procedure for duplicating a field one character at a time is a little more complicated. You can find out how to perform this procedure in the DDS Reference manual.

-Matt Kofsky

DUP Key Processing

Figure 10 DDS Required for DUP Key Activation

 *.. 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6 ...+... 7 A R INFMT A INDTE 5 I 3 2 A 20 DUP(30) A INDTEH 5 2H
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