B1 Beginning Segment for Booking or Pickup/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	Mandatory	ID	2/4	AtMax 1
2	145	Shipment Identification Number	Opt	Alphanumeric	1/30	AtMax 1
3	373	Date	Opt	Date	8/8	AtMax 1
4	558	Reservation Action Code	Opt	ID	1/1	AtMax 1
5	1073	Yes/No Condition or Response Code	Opt	ID	1/1	AtMax 1
6	1658	Shipment or Work Assignment Decline Reason Code	Opt	ID	3/3	AtMax 1

ID140

NameStandard Carrier Alpha Code

LengthMin 2 / Max 4

Position1

RequirementMandatory