NDF_CGET( INDF, COMP, VALUE, STATUS )
-- Obtain the value of an NDF character component
NDF_CPUT( VALUE, INDF, COMP, STATUS )
-- Assign a value to an NDF character component
NDF_MAP( INDF, COMP, TYPE, MMOD, PNTR, EL, STATUS )
-- Obtain mapped access to an array component of an NDF
NDF_MAPQL( INDF, PNTR, EL, BAD, STATUS )
-- Map the quality component of an NDF as an array of logical values
NDF_MAPZ( INDF, COMP, TYPE, MMOD, RPNTR, IPNTR, EL, STATUS )
-- Obtain complex mapped access to an array component of an NDF
NDF_QMASK( QUAL, BADBIT )
-- Combine an NDF quality value with a bad-bits mask to give a logical result
NDF_UNMAP( INDF, COMP, STATUS )
-- Unmap an NDF or a mapped NDF array