.Annex60.BoundaryConditions.Types.SkyTemperatureCalculation .Annex60.BoundaryConditions.Types.SkyTemperatureCalculationEnumeration to define the method used to compute the sky temperature.
type SkyTemperatureCalculation = enumeration(HorizontalRadiation "Use horizontal irradiation", TemperaturesAndSkyCover "Use dry-bulb and dew-point temperatures and sky cover");