The purpose of this feature is to allow multiple automatic executions of COPERT, by externally providing input data and subsequently receiving results in an external file. Moreover, third party applications (like Matlab or custom software) will be able to execute COPERT via the Command Line Interface to perform automated tasks.
Calculation methodology will follow the COPERT functionalities allowing for emission factor and emission calculation as well as energy consumption calculation. Advanced features of the model can only be run by using the windows version of the tool.
More info can be found here.