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

```       CheckDigits::M10_008 - compute check digits for Sedol (GB)

```

#### SYNOPSIS

```         use Algorithm::CheckDigits;

\$sedol = CheckDigits('sedol');

if (\$sedol->is_valid('0123457')) {
# do something
}

\$cn = \$sedol->complete('012345');
# \$cn = '0123457'

\$cd = \$sedol->checkdigit('0123457');
# \$cd = '7'

\$bn = \$sedol->basenumber('0123457');
# \$bn = '012345'

```

#### DESCRIPTION

```   ALGORITHM
1.  Beginning left all numbers are weighted with 1,3,1,7,3,9 and 1 (checkdigit)

3.  The check digit is the difference of the sum from step 3 to the next multiple of 10.

METHODS
is_valid(\$number)
Returns true only if \$number consists solely of numbers and the last 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 concatenated to the end of \$number.

Returns the complete number with check digit or '' if \$number does not consist solely
of digits and spaces.

basenumber(\$number)
Returns the basenumber of \$number if \$number has a valid check digit.

Return '' otherwise.

checkdigit(\$number)
Returns the checkdigit of \$number if \$number has a valid check digit.

Return '' otherwise.

EXPORT
None by default.

```

#### AUTHOR

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

```

#### SEEALSO

```       perl, CheckDigits, www.pruefziffernberechnung.de.
```