Figure 199 shows how to specify the MAPVAL keyword.
Figure 199. Specifying the MAPVAL Keyword
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00010A
00020A R RECORD
00030A DATFLD1 L DATFMT(*MDY) DATSEP('/')
00040A MAPVAL(('01/01/40' *BLANK))
On output, if the field data equals '01/01/40', the field data is changed to all blanks. On input, if the field data is blank, the field data is changed to '01/01/40'.
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