package FooConstants;
## ISA exporter and so on...

use constant TYPE_BAR => 'bar';
use constant TYPE_BAZ => 'baz';

## etc...


##</code><code>##

// Note-- Java code. Heresy! Heresy!
public interface FooConstants {

    public static final String TYPE_BAR = "bar";
    public static final String TYPE_BAZ = "baz";

    //... etc...
}