| Synonym | Encoding |
|---|---|
| 0000 | UNKNOWN |
| 0010 | Lecture |
| 0018 | Annotation |
| 0020 | Other ORP type |
| 0023 | Event |
| 0024 | Film |
| 0025 | Image |
| 0026 | InteractiveResource |
| 0027 | Model |
| 0028 | PhysicalObject |
| 0030 | Sound |
| 0033 | Audiovisual |
| 0042 | Virtual Appliance |
| 0048 | Research Object |
| 0049 | Research Activity |