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| Attribute | Multi-valued? | Required? | Notes |
|---|---|---|---|
| Address | Yes | No | See note  below. |
| AdHocAttribute | Yes | No | |
| EmailAddress | Yes | No | See note below. |
| Identifier | Yes | No | Does not automatically include the unique key (SORID). See note below. |
| Name | Yes | No | At least one Name must be returned, and exactly one Name must be flagged primary. See note below. |
| OrgIdentity.affiliation | No | No | Possible values may vary by CO; see CoExtendedType::definedTypes |
| OrgIdentity.title | No | No | |
| OrgIdentity.o | No | No | |
| OrgIdentity.ou | No | No | |
| OrgIdentity.valid_from | No | No | Must be in UTC time, and database format, eg via strftime("%F %T", ...) |
| OrgIdentity.valid_through | No | No | Must be in UTC time, and database format, eg via strftime("%F %T", ...) |
| TelephoneNumber | Yes | No | See note below. |
| Url | Yes | No | See note below. Available from Registry v3.1.0. |
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