partial function der_humidityRatio_xi extends TILMedia.BaseClasses.PartialGasObjectFunction; input SI.MassFraction[:] xi "Mass fractions of the first nc-1 components"; input TILMedia.Internals.TILMediaExternalObject gasPointer; input Real[:] der_xi "Derivative of Mass fractions of the first nc-1 components"; output Real der_humRatio "Content of condensing component aka humidity ratio"; end der_humidityRatio_xi;