ty also sets up the naming OS attribute and this attribute represents an identi- fier for the steward of the entity. There is a unique naming OS for each entity published on CCV. Alias name list: The attribute is a list of name-value pairs for the entity. The name refers to the type of alias and the value component holds the alias itself. User label: It is an optional attribute that represents the "user friendly" name for the entity. Owner: It is an optional attribute that is used to identify the owner of the entity. Vendor extensions: This attribute is used by vendors to further qualify and extend the entity characteristics. MTOSI provides steps to discover new network entities such as managed elements and topological links in cases where two different suppliers are providing the net- work inventory management OS and the network discovery/activation OS. Another interesting feature in MTOSI is backward and forward compatibility. Backward compatibility: This feature allows a new version of a client os to be rolled out in a way that does not break existing server OSs. An older ver- sion of a message can be sent to a client os (by server OS) that understands the new version and still have the message successfully processed. Forward compatibility: This feature allows a new version of a server os to be rolled out in a way that does not break existing client OSs. The server os can send a newer version of an instance and still have the instance successfully processed. MTOSI allows a client OS to perform multiple operations on multiple objects using a single request to a server OS. In this approach, the transactional logic is delegated to the server OS facilitating in performance tasks like configuration of a managed element and all associated equipment and ports. Also the same operation can be Standard Interfaces performed on a large number of objects of the same type in an efficient manner. These requests may contain multiple actions and/or objects and the requests may be of long duration. 25.3 MTOSI Notifications In t