The QUALIFIED keyword controls how the record formats for the file are specified in your RPG source.
If this keyword is specified, the record formats must be qualified with the file name when they are specified in the RPG source; for example format FMT1 in qualified file FILE1 must be specified as FILE1.FMT1. The record format names can be the same as other names used within the RPG source.
If this keyword is not specified, the record formats must not be qualified with the file name; format FMT1 is specified as FMT1. The record format names must be unique names within the RPG source.