Swedish personal identity number: a birth date, then a dash, or a plus sign when the holder is over a hundred, then four digits. The separator is mandatory and the date is validated, which together keep it apart from any other run of digits.
Label: SE_PERSONNUMMER
(?<!\w)(?:\d{2})?\d{2}(?:0[1-9]|1[0-2])(?:0[1-9]|[12]\d|3[01])[-+]\d{4}(?!\w)The record shows 900101-1234 for that patient. → 900101-1234He is listed as 19900101-1234 in the old system. → 19900101-1234The code 901301-1234 has no such monthReference 9001011234Tags: se, government-id, identity