Identifying number for Purchase Order assigned by the orderer/purchaser.

XPO01 is the preassigned purchase order number. If a range of purchase order numbers is to be transmitted, use XPO01 for the first number and XPO02 as the ending number.

Identifying number for Purchase Order assigned by the orderer/purchaser.

Code designating the system/method of code structure used for Identification Code (67).

XPO03 and XPO04 specify the location that the purchase order numbers apply to.

If either XPO03 or XPO04 is present, then the other is required.

Code identifying a party.