Input Standards | |||
| Optional/Optional | |||
| 1st Indicator Undefined | |||
| Undefined | |||
| 2nd Indicator Undefined | |||
| Undefined | |||
| Subfields (R=Repeatable NR=Nonrepeatable) | Input Standards | ||
| ‡a | Classification number (R) | Mandatory/Mandatory | |
| ‡b | Item number (NR) | Required if applicable/Optional | |
| ‡c | Copy information (NR) | Required if applicable/Optional | |