There are five MDUP object classes and their associated object identifiers (see the following table).
Note: The third and fourth columns of the following table contain the contents octets of the BER encoding of the object identifier. MDUP object identifiers stem from the root {joint-iso-ccitt(2) mhs-motis(6) arch(5) oc(1)}.
Object Identifiers for MDUP Object Classes
| Object Identifier BER |
| Package | Object Class | Decimal | Hexadecimal |
| MDUP | DS_O_MHS_ DISTRIBUTION_LIST |
86, 5, 1, 0 | \x56\x05\x01\x00 |
| MDUP | DS_O_MHS_MESSAGE_ STORE |
86, 5, 1, 1 | \x56\x05\x01\x01 |
| MDUP | DS_O_MHS_MESSAGE_ TRANS_AG |
86, 5, 1, 2 | \x56\x05\x01\x02 |
| MDUP | DS_O_MHS_USER | 86, 5, 1, 3 | \x56\x05\x01\x03 |
| MDUP | DS_O_MHS_USER_AG | 86, 5, 1, 4 | \x56\x05\x01\x04 |