Originally Posted by
Safak
Sometimes I do OLCI and save the mobile pass then also receiving a printed BP. If you happen to have a QR code for the same flight, did you try to compare it with the barcode? Maybe they're mapping QR code data into barcode - some sort of transformation?
"Unfortunately" I did already compare with the QR code in the app - it's identical, except for the "source of boarding pass issuance" field (O for ticket counter, M for mobile). That field is in the standardized part & you can (with a little effort) find the specification with google.
(unfortunately because no further information or hints from there...)