use Data::Dumper;
%ERRORS=('OK'=>0,'WARNING'=>1,'CRITICAL'=>2,'UNKNOWN'=>3,'DEPENDENT'=>4);
%ERRORS_TEXT = reverse %ERRORS;
print Dumper(\%ERRORS);
print Dumper(\%ERRORS_TEXT);
__END__
$VAR1 = {
          'WARNING' => 1,
          'CRITICAL' => 2,
          'OK' => 0,
          'DEPENDENT' => 4,
          'UNKNOWN' => 3
        };
$VAR1 = {
          '1' => 'WARNING',
          '4' => 'DEPENDENT',
          '0' => 'OK',
          '3' => 'UNKNOWN',
          '2' => 'CRITICAL'
        };