
Each updated object receives a new USN whenever a change is committed. This identifier does not change for the lifetime of the object and is used to refer to the object in later API calls.Įach of these objects also has an update sequence number (USN) that is changed whenever the object is modified on the service. The structures on the left side of the diagram ( User, Accounting, UserAttributes) are accessed via the UserStore service, while the ones on the right are accessed via the NoteStore service.Įach of the core NoteStore objects is identified by a globally unique identifier (GUID) that is assigned by the service when the object is first created.
