REFERENCE(NONKEYFIELDS) TYPE GRPCRTA_S_PROLOG-NONKEYFIELDS OPTIONAL
REFERENCE(E_KEYFIELDS) TYPE GRPCRTA_S_PROLOG-KEYFIELDS
REFERENCE(E_KEYVALUES) TYPE GRPCRTA_S_PROLOG-KEYVALUES
REFERENCE(I_KEYFIELDS) TYPE GRPCRTA_S_PROLOG-KEYFIELDS OPTIONAL