I_T_MEAN_HEAD STRUCTURE RSDMSC_MEAN_HEAD
I_T_MEAN_HEAD STRUCTURE RSDMSC_MEAN_HEAD OPTIONAL
E_T_MEAN_HEAD STRUCTURE RSDMSC_MEAN_HEAD OPTIONAL
E_T_MEAN_HEAD STRUCTURE RSDMSC_MEAN_HEAD
I_T_MEAN_DTL STRUCTURE RSDMSC_MEAN_HEAD OPTIONAL