1Algorithm::CheckDigits:U:sMe1r1_C0o1n1t(r3i)buted Perl DAolcguomreintthamt:i:oCnheckDigits::M11_011(3)
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NAME

6       CheckDigits::M11_011 - compute check digits for VAT Registration Number
7       (NL)
8

SYNOPSIS

10         use Algorithm::CheckDigits;
11
12         $ustid = CheckDigits('ustid_nl');
13
14         if ($ustid->is_valid('123456782')) {
15               # do something
16         }
17         if ($ustid->is_valid('123456782B04')) {
18               # do something
19         }
20
21         $cn = $ustid->complete('12345678');
22         # $cn = '123456782'
23         $cn = $ustid->complete('12345678.B04');
24         # $cn = '123456782B04'
25
26         $cd = $ustid->checkdigit('123456782');
27         # $cd = '2'
28         $cd = $ustid->checkdigit('123456782B04');
29         # $cd = '2'
30
31         $bn = $ustid->basenumber('123456782');
32         # $bn = '12345678';
33         $bn = $ustid->basenumber('123456782B04');
34         # $bn = '12345678.B04';
35

DESCRIPTION

37       This VATRN has 12 "digits", the third last must be a B, the fourth last
38       is the checkdigit. I don't know anything about the meaning of the last
39       two digits.
40
41       You may use the whole VATRN or only the first eight digits to compute
42       the checkdigit with this module.
43
44   ALGORITHM
45       1.  Beginning right with the digit before the checkdigit all digits are
46           weighted with their position. I.e. the digit before the checkdigit
47           is multiplied with 2, the next with 3 and so on.
48
49       2.  The weighted digits are added.
50
51       3.  The sum from step 2 is taken modulo 11.
52
53       4.  If the sum from step 3 is 10, the number is discarded.
54
55   METHODS
56       is_valid($number)
57           Returns true only if the first eight positions of $number consist
58           solely of digits (maybe followed by 'B' and to further digits) and
59           the eighth digit is a valid check digit according to the algorithm
60           given above.
61
62           Returns false otherwise,
63
64       complete($number)
65           The check digit for $number is computed and inserted at position
66           eight of $number.
67
68           Returns the complete number with check digit or '' if $number does
69           not consist solely of digits a dot and maybe 'B' at the ninth
70           position.
71
72       basenumber($number)
73           Returns the basenumber of $number if $number has a valid check
74           digit.
75
76           Return '' otherwise.
77
78       checkdigit($number)
79           Returns the check digits of $number if $number has valid check
80           digits.
81
82           Return '' otherwise.
83
84   EXPORT
85       None by default.
86

SEE ALSO

88       perl, CheckDigits, www.pruefziffernberechnung.de,
89

AUTHOR

91       Mathias Weidner, "<mamawe@cpan.org>"
92

94       Copyright 2004-2020 by Mathias Weidner
95
96       This library is free software; you can redistribute it and/or modify it
97       under the same terms as Perl itself.
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101perl v5.34.0                      2022-01-20Algorithm::CheckDigits::M11_011(3)
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