To provide reference to a specific purchase order
| Position | Element | Name | Type | Min/Max | Repeat | |
|---|---|---|---|---|---|---|
| 1 | 324  | Purchase Order Number | Mandatory | Alphanumeric | 1/22 | AtMax 1 | 
| 2 | 328  | Release Number | Opt | Alphanumeric | 1/30 | AtMax 1 | 
| 3 | 327  | Change Order Sequence Number | Opt | Alphanumeric | 1/8 | AtMax 1 | 
| 4 | 373  | Date | Opt | Date | 8/8 | AtMax 1 | 
| 5 | 350  | Assigned Identification | Opt | Alphanumeric | 1/20 | AtMax 1 | 
| 6 | 367  | Contract Number | Opt | Alphanumeric | 1/30 | AtMax 1 | 
| 7 | 92  | Purchase Order Type Code | Opt | ID | 2/2 | AtMax 1 |