# stdnum.si.ddv

ID za DDV (Davčna številka, Slovenian VAT number).

The DDV number (Davčna številka) is used for VAT (DDV, Davek na dodano vrednost) purposes and consist of 8 digits of which the last is a check digit.

    >>> validate('SI 5022 3054')
    '50223054'
    >>> validate('SI 50223055')  # invalid check digits
    Traceback (most recent call last):
        ...
    InvalidChecksum: ...

`stdnum.si.ddv.``calc_check_digit`(number)

  Calculate the check digit. The number passed should not have the check digit included.

`stdnum.si.ddv.``compact`(number)

  Convert the number to the minimal representation. This strips the number of any valid separators and removes surrounding whitespace.

`stdnum.si.ddv.``is_valid`(number)

  Check if the number is a valid VAT number.

`stdnum.si.ddv.``validate`(number)

  Check if the number is a valid VAT number. This checks the length, formatting and check digit.