In MPS I have defined a template:
template reduce_Car
Input Car
parameters
color : String
<TF [<Car>???</Car>] TF>
Now I wanted to use the defined parameter "color" in my template?
You access parameters through genContext. So wrap the text to replace with a property macro
<TF [<Car>$[red]</Car>] TF>
and down in the Inspector for the property macro access the parameter as 'genContext.color'