This EventTypeis defined in OPC 10000-3. Its representation in the AddressSpaceis formally defined in Table 26.

Table 26– AuditChannelEventType Definition

Attribute	Value
BrowseName	AuditChannelEventType
IsAbstract	True
References	NodeClass	BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the AuditSecurityEventType defined in 6.4.4, which means it inherits the InstanceDeclarations of that Node.
HasSubtype	ObjectType	AuditOpenSecureChannelEventType	Defined in 6.4.6
HasProperty	Variable	SecureChannelId	String	PropertyType	Mandatory

This EventTypeinherits all Propertiesof the AuditSecurityEventType. Their semantic is defined in 6.4.4. The SourceNode Propertyfor Eventsof this type shall be assigned to the Server Object. The SourceNamefor Eventsof this type shall be “SecureChannel/” and the Servicethat generates the Event(e.g. SecureChannel/OpenSecureChannelor SecureChannel/CloseSecureChannel). If the ClientUserId is not available for a CloseSecureChannelcall, then this parameter shall be set to ”System/CloseSecureChannel”.

The SecureChannelIdshall uniquely identify the SecureChannel. The application shall use the same identifier in all AuditEventsrelated to the Session Service Set (AuditCreateSessionEventType, AuditActivateSessionEventType and their subtypes) and the SecureChannel Service Set (AuditChannelEventType and its subtypes).