| Attribute | Must | Description |
|---|---|---|
| Access-Category | X | The access control category of this attribute type |
| Attribute-ID | X | The internal attribute Id that this record governs |
| Attribute-Syntax | X | Identifies the data representation syntax |
| Common-Name | X | X.500 Common Name (DN of this object) |
| Extended-Chars-Allowed | =1 Extended characters allowed, =0 not allowed. | |
| Is-Single-Valued | X | Indicates if the att is single or multivalued |
| LDAP-Display-Name | LDAP display name for the attribute | |
| Link-ID | Identifies Links and Backlinks (DL=>Member & Mailbox=>Is-Member-Of) | |
| MAPI-ID | The MAPI ID of this attribute | |
| OID-Type | Specifies the Object ID type in the scripts. | |
| OM-Object-Class | The XAPIA OM Object class of this attribute (if it has one) | |
| OM-Syntax | X | The XAPIA OM Syntax of this attribute |
| Range-Lower | Minimum size for attribute value | |
| Range-Upper | Maximum size for attribute value | |
| Schema-Flags | The flags for the attribute (replicate to other site or not etc.) | |
| Search-Flags | TRUE will cause the DS to generate a fast search index. |