D-floating-point-base

    OpenVMS usage:floating_point
    type:         D_floating
    access:       read only
    mechanism:    by value

    Base. The D-floating-point-base argument is a D-floating number
    containing the base.

 longword-integer-exponent

    OpenVMS usage:longword_signed
    type:         longword (signed)
    access:       read only
    mechanism:    by value

    Exponent. The longword-integer-exponent argument is a signed
    longword that contains the signed longword integer exponent.