9 Standard EventTypes 
9.25 AuditDeleteReferencesEventType
This is a subtype of AuditNodeManagementEventType and is used for Events generated from calling the DeleteReferences Service defined in OPC 10000-4.
Online versions of OPC UA specifications and information models.
This is a subtype of AuditNodeManagementEventType and is used for Events generated from calling the DeleteReferences Service defined in OPC 10000-4.