type TypeOfPrimaryEnergyCarrier = enumeration(BrownCoal "Brown Coal", BlackCoal "Black Coal", NaturalGas "Natural Gas", WindOnshore "Onshore Wind", WindOffshore "Offshore Wind", Solar "Solar", Hydro "Hydro", Nuclear "Nuclear", Oil "Oil", DistrictHeating "District Heating", Electricity "Electricity", Biomass "Biomass", Garbage "Garbage", Others "All other or unknown");