H-floating-point-base
    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by value
    Base. The H-floating-point-base argument is an H-floating number
    containing the base.
 H-floating-point-exponent
    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by value
    Exponent. The H-floating-point-exponent argument is an H-floating
    number that contains the H-floating exponent.