This standard Object Node is the browse entry point for EventType Nodes. Figure 7 illustrates the structure beneath this Node showing some of the standard EventTypes defined in Clause 6. Only Organizes References are used to relate Objects and ObjectTypes to the "EventTypes" standard Object. The "EventTypes" Object shall not reference any other NodeClasses.

image010.png

Figure 7 – EventTypes organization

The intention of the "EventTypes" Object is that all EventTypes of the Server are either directly or indirectly accessible browsing HierarchicalReferences starting from this Node. It is required that the Server expose all its EventTypes, so a client can usefully subscribe to Events.

The "EventTypes" Object is formally defined in Table 104.

Table 104 – EventTypes definition

Attribute

Value

BrowseName

EventTypes

References

NodeClass

BrowseName

Comment

HasTypeDefinition

ObjectType

FolderType

Defined in 6.6

Organizes

ObjectType

BaseEventType

Defined in 6.4.2

Conformance Units

Address Space Events 2