This EventType is defined in OPC 10000-3. Its representation in the AddressSpace is formally defined in Table 34.

Table 34 – AuditCertificateEventType definition

Attribute		Value
BrowseName		AuditCertificateEventType
IsAbstract		True
References	NodeClass		BrowseName	DataType	TypeDefinition	ModellingRule
Subtype of the AuditSecurityEventType defined in 6.4.7, which means it inherits the InstanceDeclarations of that Node.
HasProperty	Variable		Certificate	ByteString	PropertyType	Mandatory
Conformance Units
Auditing Connections

This EventType inherits all Properties of the AuditSecurityEventType. Their semantic is defined in 6.4.4. The SourceName for Events of this type shall be "Security/Certificate".

Certificate is any certificate validated by a Server that encountered a validation issue (i.e. users, applications, etc.). Additional subtypes of this EventType will be defined representing the individual validation errors. This certificate can be matched to the Service that passed it (Session or SecureChannel Service Set) since the AuditEvents for these Services also included the Certificate.