Using Indicator Variables
The syntax for referring to an indicator variable is the same as for a simple variable, except that an indicator variable is always associated with a host variable:
host_variable:indicator_variable
Syntax Note:
The indicator variable can be a simple variable, an array element or a structure member that yields a short integer. For example:
## short ind_var, *ind_ptr, ind_arr[5];
var_1:ind_var
var_2:*ind_ptr
var_3:ind_arr[2]