NDF_ACLEN( INDF, COMP, IAXIS, LENGTH, STATUS )
-- Determine the length of an NDF axis character component
NDF_ACRE( INDF, STATUS )
-- Ensure that an axis coordinate system exists for an NDF
NDF_AFORM( INDF, COMP, IAXIS, FORM, STATUS )
-- Obtain the storage form of an NDF axis array
NDF_ANORM( INDF, IAXIS, NORM, STATUS )
-- Obtain the logical value of an NDF axis normalisation flag
NDF_AREST( INDF, COMP, IAXIS, STATUS )
-- Reset an NDF axis component to an undefined state
NDF_ASNRM( NORM, INDF, IAXIS, STATUS )
-- Set a new value for an NDF axis normalisation flag
NDF_ASTAT( INDF, COMP, IAXIS, STATE, STATUS )
-- Determine the state of an NDF axis component (defined or undefined)
NDF_ASTYP( TYPE, INDF, COMP, IAXIS, STATUS )
-- Set a new numeric type for an NDF axis array
NDF_ATYPE( INDF, COMP, IAXIS, TYPE, STATUS )
-- Obtain the numeric type of an NDF axis array