B1 Beginning Segment for Booking or Pick-up/Delivery

Mandatory

AtMax 1

To transmit identifying numbers, dates, and other basic data relating to the transaction set

Elements

Position	Element	Name		Type	Min/Max	Repeat

1	140	Standard Carrier Alpha Code	Opt	ID	2/4	Exact 1
2	145	Shipment Identification Number	Mandatory	Alphanumeric	1/30	Exact 1
3	373	Date	Opt	Date	8/8	Exact 1
4	558	Reservation Action Code	Opt	ID	1/1	Exact 1

ID140

NameStandard Carrier Alpha Code

LengthMin 2 / Max 4

Position1

RequirementOpt