Some Countries has 2 letter type of document passports.

In my application some Maldivians and other poeple are using it too. and we are scanning the passport, but it shows unrecognised document formate, buts its correct as per ICAO Doc 9303 standard allows countries to define custom 2-character document types (e.g. PR, PC, ID, etc.) . In there passport PRMDVLastName<

Start by tracing the MRZ document-type validation entry point and the existing passport-format tests; no file or test path is named in the issue. Reproduce the Maldivian example with the two-character PR type, then confirm that valid ICAO Doc 9303 custom document types are accepted without regressing existing validation.

Written by the indexing model from the issue text.