What does BAG at the beginning of KLM Royal Dutch Airlines' Customer and Product Record mean?

As in:

--- BAG ---
CUSTOMER AND PRODUCT RECORD
1 LASTNAME/FIRSTNAME ...

Does it mean something like Beginning of Document?

I think that they are using standardized coding for this information; an outsider to the industry may speculate that some of the information in this record may be initially transferred to the airline from the travel agency in this or similar format.

Here is a scan of the item, with personal information redacted:

enter image description here

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What does BAG at the beginning of KLM Royal Dutch Airlines' Customer and Product Record mean? - Positive Asian girl putting ripe plums into bag while buying fruits with mother in local street bazaar

What does BAG at the beginning of KLM Royal Dutch Airlines' Customer and Product Record mean? - Man in mask choosing fresh groceries in store

What does BAG at the beginning of KLM Royal Dutch Airlines' Customer and Product Record mean? - Asian girl buying vegetables with mother in local street market

What is PNR number in KLM?

The Passenger Name Record (PNR) will provide you with information about the real-time status of your booking. You will be able to know if your KLM Royal Dutch tickets have been confirmed, or if you are on the waiting list.

Is KLM Royal Dutch a good airline?

KLM Royal Dutch Airlines is Certified as a 4-Star Airline for the quality of its airport and onboard product and staff service. Product rating includes seats, amenities, food & beverages, IFE, cleanliness etc, and service rating is for both cabin staff and ground staff.

What does KLM stand for Dutch airline?

KLM, abbreviation of Koninklijke Luchtvaartmaatschappij NV (Dutch: Royal Air Transportation Company), English: Royal Dutch Airlines, Dutch airline founded on Oct. 7, 1919, and flying its first scheduled service, between Amsterdam and London, on May 17, 1920.

Why is Royal Dutch called KLM?

Referred to as merely three letters, KLM stands for Koninklijke Luchtvaart Maatschappij, which in English translates to Royal Aviation Company. KLM was founded in 1919 by a group of Dutch businessmen who raised 1.2 million Dutch guilders, which is around half a million dollars today.

KLM Intern On A Mission - The journey of baggage

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Images: Sarah Chai, Kamaji Ogino, Michael Burrows, Kamaji Ogino