debian man page for algorithm::checkdigits::m11_012

CheckDigits::M11_012(3pm)				User Contributed Perl Documentation				 CheckDigits::M11_012(3pm)

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 and hyphens and the two digits in the middle are valid check digits according
	   to the algorithm given above.

	   Returns false otherwise,

       complete($number)
	   The check digit for $number is computed and inserted into the middle 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 v5.10.0							    2008-05-17						 CheckDigits::M11_012(3pm)