| 'KR' | Keyed File I/O Emulates BBx® | 
To switch the Keyed file I/O module to BBx® emulation mode.
The KEP( ) function returns the key of the record prior to the next record to be read. KEY( ) functions do not switch keys.
Off - See normal behaviour for the KEYED directive.
KEP( ) Return Prior Record's Key
KEYED Create Single/Multi-Keyed File
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