function h_TX_der import ThermofluidStream.Media.myMedia.Interfaces.Choices; extends Modelica.Icons.Function; input SI.Temperature T "Temperature"; input MassFraction X[nX] "Independent Mass fractions of gas mixture"; input Boolean exclEnthForm = excludeEnthalpyOfFormation "If true, enthalpy of formation Hf is not included in specific enthalpy h"; input ThermofluidStream.Media.myMedia.Interfaces.Choices.ReferenceEnthalpy refChoice = referenceChoice "Choice of reference enthalpy"; input SI.SpecificEnthalpy h_off = h_offset "User defined offset for reference enthalpy, if referenceChoice = UserDefined"; input Real dT "Temperature derivative"; input Real dX[nX] "Independent mass fraction derivative"; output Real h_der "Specific enthalpy at temperature T"; end h_TX_der;