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.

Code identifying a party or other code.