An instance of class MH_C_OR_NAME comprises a directory name, an O/R address, or both. The name is considered present if, and only if, the MH_T_DIRECTORY_NAME attribute is present. The address comprises the attributes specific to the MH_C_OR_ADDRESS class and is considered present if, and only if, at least one of those attributes is present.
An O/R name's composition is context sensitive. At submission, the name, the address, or both may be present. At transfer, or delivery, the address is present and the name can (but need not) be present. Whether at submission, transfer or delivery, the MTS uses the name, if it is present, only if the address is absent or invalid.
The attribute specific to this class is listed in the following table.
Attribute Specific to MH_C_OR_NAME
| Attribute |
Value Syntax | Value Length | Value Number | Value Initially | 1988? |
| MH_T_ DIRECTORY_ NAME |
Object(DS_ C_NAME) |
- | 0 or 1 | - | 1988 |
This attribute contains the name assigned to the user or DL by the worldwide X.500 directory.