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:
## integer*2 indvar, indarr(5)
var_1:indvar
var_3:indarr(2)