The element <materialSetRef> contains the reference to a material set (kit), and its connection to the relevant service bulletin. Each support equipment, supply or spare included in the set is detailed by use of the element <embeddedSupportEquipDescr>, <embeddedSupplyDescr> and <embeddedSpareDescr>, respectively. These elements must be given together with the element <materialSetRef>.The reference (<dmRef>) can be made either to:− a material set in a dedicated data module with IC 934 when material information is externalized from service bulletin core data moduleor− a material set in the service bulletin core data module with IC 930 when material information is included in service bulletin core data module.