interpretedDateOfBirth property

Date of birth of the document holder in "dd.MM.yyyy" format. Note that for ICAO type documents, this date is possibly based on the date in data group 1, which contains the MRZ. Dates within the MRZ only contain year information in two digits, and do not contain century information. Therefore the century information in the interpreted date is based on the current system date. The interpreter makes sure that the date of birth is always in the past. When the input MRZ date is incomplete (unknown day or unknown day and month, encoded using "<<" as per ICAO Doc 9303) the interpreter will use "00".