REFERENCE(I_DERIV_AVAIL) TYPE THM_DES_VOL_DER
REFERENCE(DER_VOL) TYPE THM_DES_VOL_DER
REFERENCE(E_VOLUME_DERIVATIVE) TYPE THMHRT_HR-VOL_DERIVATIVE
REFERENCE(E_TOT_VOL) TYPE THM_DES_VOL_DER
REFERENCE(E_AVAIL_VOL) TYPE THM_DES_VOL_DER
REFERENCE(I_DES_VOL_DERIVATIVE) TYPE THMHRT_HR-VOL_DERIVATIVE