Parfiles are dictionaries too (par:)
Parfiles are text files that define run time parameters for DDS programs.
They are useful when the application uses an extensive set of parameters
that is awkward to include on the command line. The following is an
example of using a parfile with program compute:
compute par= par_compute
The parfile, par_compute, might contain the definitions below.
comment= Average 3 datasets, clip result to range 1500 - 4785
in= in_dict_1 in_dict_2 in_dict_3
out= out_dict
mode= add
scale= 0.3333 0.3333 0.3334
funct=clip min=1500 max=4785