CheckDigits::M11_012(3User Contributed Perl DocumentatiCheckDigits::M11_012(3)NAME
CheckDigits::M11_012 - compute check digits for
Bundeswehrpersonenkennnummer (DE)
SYNOPSIS
use Algorithm::CheckDigits;
$bwpk = CheckDigits('bwpk_de');
if ($bwpk->is_valid('151058-D-20711')) {
# do something
}
$cn = $bwpk->complete('151058-D-2071');
# $cn = '151058-D-20711'
$cd = $bwpk->checkdigit('151058-D-20711');
# $cd = '1'
$bn = $bwpk->basenumber('151058-D-20711');
# $bn = '151058-D-2071';
DESCRIPTION
ALGORITHM
1. Beginning left all digits are weighted 2,3,4,5,6,7,1,6,7,2,3.
Letters are replaced according to the following table:
my %table_to = (
A => 12, B => 14, C => 16, D => 18, E => 20,
F => 22, G => 24, H => 26, I => 28, J => 6,
K => 8, L => 10, M => 12, N => 14, O => 16,
P => 18, Q => 20, R => 22, S => 4, T => 6,
U => 8, V => 10, W => 12, X => 14, Y => 16,
Z => 18,
);
2. The weighted digits are added.
3. The sum from step 2 is taken modulo 11.
4. The checksum is 11 minus the sum from step 3.
If the difference is 10, the checkdigit is 0.
If the difference is 11, the checkdigit is 1.
METHODS
is_valid($number)
Returns true only if $number consists solely of numbers, letters
and hyphens and the rightmost digit is a valid check digit
according to the algorithm given above.
Returns false otherwise,
complete($number)
The check digit for $number is computed and appended to the end of
$number.
Returns the complete number with check digit or '' if $number does
not consist solely of digits, hyphens and spaces.
basenumber($number)
Returns the basenumber of $number if $number has a valid check
digit.
Return '' otherwise.
checkdigit($number)
Returns the check digits of $number if $number has valid check
digits.
Return '' otherwise.
EXPORT
None by default.
AUTHOR
Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>
SEE ALSO
perl, CheckDigits, www.pruefziffernberechnung.de,
perl v5.14.1 2009-11-20 CheckDigits::M11_012(3)
