Originally Posted by
Speedbird676
The PNR is technically the entire record and the alphanumeric string used to retrieve the record is the PNR Locator or Record Locator rather than the PNR itself.
http://en.wikipedia.org/wiki/Passenger_Name_Record
However, it is common practice to refer to the alphanumeric string as the PNR, Locator or Booking Reference.
True, but those who have to work with them on a day-by-day basis usually just refer to either the PNR or the "relock".
Dave