B13 Beginning Segment for Appointment Schedule
To transmit identifying numbers and other basic data relating to the Appointment Schedule transaction set
Reference information as defined for a particular Transaction Set or as specified by the Reference Identification Qualifier
B1301 is the appointment pickup or delivery request reference number. It is a number assigned by the party requesting the original appointment that uniquely identifies the request for a pickup or delivery appointment. It is not a unique appointment number.
Code identifying the Standard Carrier Alpha Code
B1302 is the Standard Carrier Alpha Code (SCAC) of the carrier who will be keeping the appointment.