Query File. Provides a simpler version of the OPNQRYF command. Uses a 'fill in
the blanks' solution to the QRYSLT parameter. Can be used for simple
select/sort functions or to provide a 'leg up' on generating a full OPNQRYF
command. The BLDQRYSLT command is useful in CL programs to allow a simpler
approach to the QRYSLT parameter in the same manner. BLDQRYSLT returns a
variable which is then specified as the QRYSLT value for OPNQRYF.