...
## easily updated                   ##

our @ISA= qw(Exporter);
our @EXPORT=qw($NPR_TO_DAC $NPR_TO_ADC);

use constant CONST => 2;
...

##</code><code>##

#! /usr/bin/perl

package definitions;

require Exporter;
use base 'Exporter';
use strict;
use warnings;

#################
## definitions ##


our @EXPORT=qw($NPR_TO_DAC $NPR_TO_ADC);

use constant CONST => 2;
use constant CONST2 => 3;
print CONST;
1;