Provided by: libalgorithm-checkdigits-perl_0.50-1_all

#### NAME

```       Algorithm::CheckDigits - Perl extension to generate and test check digits

```

#### SYNOPSIS

```         perl -MAlgorithm::CheckDigits -e Algorithm::CheckDigits::print_methods

or

use Algorithm::CheckDigits;

@ml = Algorithm::CheckDigits->method_list();

\$isbn = CheckDigits('ISBN');

if (\$isbn->is_valid('3-930673-48-7')) {
# do something
}

\$cn = \$isbn->complete('3-930673-48');     # \$cn = '3-930673-48-7'

\$cd = \$isbn->checkdigit('3-930673-48-7'); # \$cd = '7'

\$bn = \$isbn->basenumber('3-930673-48-7'); # \$bn = '3-930673-48'

```

#### ABSTRACT

```       This module provides a number of methods to test and generate check digits. For more
information have a look at the web site www.pruefziffernberechnung.de (german).

```

#### SUBROUTINES/METHODS

```   CheckDigits(\$method)
Returns an object of an appropriate Algorithm::CheckDigits class for the given algorithm.

Dies with an error message if called with an unknown algorithm.

See below for the available algorithms. Every object understands the following methods:

is_valid(\$number)
Returns true or false if \$number contains/contains no valid check digit.

complete(\$number)
Returns a string representation of \$number completed with the appropriate check digit.

checkdigit(\$number)
Extracts the check digit from \$number if \$number contains a valid check digit.

basenumber(\$number)
Extracts the basenumber from \$number if \$number contains a valid check digit.

Algorithm::CheckDigits::method_list()
Returns a list of known methods for check digit computation.

Algorithm::CheckDigits::print_methods()
Returns a list of known methods for check digit computation.

You may use the following to find out which methods your version of Algorithm::CheckDigits
provides and where to look for further information.

perl -MAlgorithm::CheckDigits -e Algorithm::CheckDigits::print_methods

CHECK SUM METHODS
At the moment these methods to compute check digits are provided: (vatrn - VAT Return
Number, in german ustid UmsatzSTeuer-ID)

m07-001
See Algorithm::CheckDigits::M07_001.

euronote, m09-001
European bank notes, see Algorithm::CheckDigits::M09_001.

amex, bahncard, diners, discover, enroute, eurocard, happydigits, isin, jcb, klubkarstadt,
mastercard, miles&more, visa, m09-001, imei, imeisv
See Algorithm::CheckDigits::M10_001.

siren, siret, m10-002
See Algorithm::CheckDigits::M10_002.

ismn, m10-003
See Algorithm::CheckDigits::M10_003.

ean, iln, isbn13, nve, 2aus5, m10-004
See Algorithm::CheckDigits::M10_004.

identcode_dp, leitcode_dp, m10-005
See Algorithm::CheckDigits::M10_005.

rentenversicherung, m10-006
See Algorithm::CheckDigits::M10_006.

sedol, m10-008
See Algorithm::CheckDigits::M10_008.

betriebsnummer, m10-009
See Algorithm::CheckDigits::M10_009.

postscheckkonti, m10-010
See Algorithm::CheckDigits::M10_010.

ups, m10-011
See Algorithm::CheckDigits::M10_011.

hkid, isbn, issn, nhs_gb, ustid_pt, vat_sl, wagonnr_br, m11-001
See Algorithm::CheckDigits::M11_001.

pzn, m11-002
See Algorithm::CheckDigits::M11_002.

pkz, m11-003
See Algorithm::CheckDigits::M11_003.

cpf, titulo_eleitor, m11-004
See Algorithm::CheckDigits::M11_004.

ccc_es, m11-006
See Algorithm::CheckDigits::M11_006.

ustid_fi, vatrn_fi, m11-007
See Algorithm::CheckDigits::M11_007.

ustid_dk, vatrn_dk, m11-008
See Algorithm::CheckDigits::M11_008.

nric_sg, m11-009
See Algorithm::CheckDigits::M11_009.

ahv_ch, m11-010
See Algorithm::CheckDigits::M11_010.

ustid_nl, vatrn_nl, m11-011
See Algorithm::CheckDigits::M11_011.

bwpk_de, m11-012
See Algorithm::CheckDigits::M11_012.

ustid_gr, vatrn_gr, m11-013
See Algorithm::CheckDigits::M11_013.

esr5_ch, m11-015
See Algorithm::CheckDigits::M11_015.

ustid_pl, vatrn_pl, m11-016
See Algorithm::CheckDigits::M11_016.

ecno, ec-no, einecs, elincs, m11-017
See Algorithm::CheckDigits::M11_017.

isan, m16-001
See Algorithm::CheckDigits::M16_001.

dni_es, m23-001
See Algorithm::CheckDigits::M23_001.

ustid_ie, vatrn_ie, m23-002
See Algorithm::CheckDigits::M23_002.

code_39, m43-001
See Algorithm::CheckDigits::M43_001.

ustid_lu, vatrn_lu, m89-001
See Algorithm::CheckDigits::M89_001.

ustid_be, vatrn_be, m97-001
See Algorithm::CheckDigits::M97_001.

iban, m97-002
See Algorithm::CheckDigits::M97_002.

upc, mbase-001
See Algorithm::CheckDigits::MBase_001.

blutbeutel, bzue_de, ustid_de, vatrn_de, mbase-002
See Algorithm::CheckDigits::MBase_002.

sici, mbase-003
See Algorithm::CheckDigits::MBase_003.

pa_de, mxx-001
See Algorithm::CheckDigits::MXX_001.

cas, mxx-002
See Algorithm::CheckDigits::MXX_002.

dem, mxx-003
Old german bank notes (DEM), see Algorithm::CheckDigits::MXX_003.

ustid_at, vatrn_at, mxx-004
See Algorithm::CheckDigits::MXX_004.

esr9_ch, mxx-005
See Algorithm::CheckDigits::MXX_005.

verhoeff, mxx-006
Verhoeff scheme, see Algorithm::CheckDigits::MXX_006 or Algorithm::Verhoeff

EXPORT
None by default.

```

#### SEEALSO

```       perl, www.pruefziffernberechnung.de.

```

#### AUTHOR

```       Mathias Weidner, <mathias@weidner.in-bad-schmiedeberg.de>

```

#### THANKS

```       Petri Oksanen made me aware that CheckDigits('IMEI') would invoke no test at all since
there was no entry for this in the methods hash.

```

```       Copyright 2004-2006 by Mathias Weidner