# What is MIRAGE made of ? (Outdated)

Four times in the model the file Variables.gms is used. Variables.gms contains all variable of the model and we use it to write concisely all the actions that must be perfom on all variables. For this purpose, we take advantage of the macro language provided by the \$batinclude command. Expect for a change in the model, this file must not be changed. It is always associated with other files: