Table 47 describes the details of the Address Space Notifier Server Facet. This Facet requires the support of a hierarchy of Object Nodes that are notifiers and Nodes that are event sources. The hierarchy is commonly used as a way to organize a plant into areas that can be managed by different operators.

Table 47 – Address Space Notifier Server Facet

Group	Conformance Unit / Profile Title	Optional
Address Space Model	Address Space Notifier Hierarchy	False
Address Space Model	Address Space Source Hierarchy	False