XmlElement

An XML element encoded as a UTF-8 string.

Field	DataType	ValueRank
Length	Int32	Scalar
Value	Char	Array

NodeId

An identifier for a node in a UA server address space.

Field	DataType	ValueRank
NodeIdType	NodeIdType	Scalar
Reserved1	Bit	Scalar
TwoByte	TwoByteNodeId	Scalar
FourByte	FourByteNodeId	Scalar
Numeric	NumericNodeId	Scalar
String	StringNodeId	Scalar
Guid	GuidNodeId	Scalar
ByteString	ByteStringNodeId	Scalar

QualifiedName

A string qualified with a namespace index.

Field	DataType	ValueRank
NamespaceIndex	Int32	Scalar
Name	CharArray	Scalar

LocalizedText

A string qualified with a namespace index.

Field	DataType	ValueRank
LocaleSpecified	Bit	Scalar
TextSpecified	Bit	Scalar
Reserved1	Bit	Scalar
Locale	CharArray	Scalar
Text	CharArray	Scalar

NamingRuleType

This data type is an enumeration that identifies the NamingRule.

Enum String	Enum Value
Mandatory	1
Optional	2
Constraint	3

IdType

An enumeration that identifies the IdType of a NodeId.

Enum String	Enum Value	Description
Numeric	0	Numeric value
String	1	String value
Guid	2	Globally Unique Identifier
Opaque	3	Namespace specific format

NodeClass

An enumeration that identifies a NodeClass.

Enum String	Enum Value
Unspecified	0
Object	1
Variable	2
Method	4
ObjectType	8
VariableType	16
ReferenceType	32
DataType	64
View	128

Argument

Defines a method input or output argument specification.

It is for example used in the input and output argument Properties for methods.

Field	DataType	ValueRank	Description
Name	String	Scalar	The name of the argument
DataType	NodeId	Scalar	The NodeId of the DataType of this argument.
ValueRank	Int32	Scalar	Indicates whether the DataType is an array and how many dimensions the array has. More...
ArrayDimensions	UInt32	Array	Specifies the length of each dimension for an array dataType. More...
Description	LocalizedText	Scalar	A localised description of the argument.

ValueRank

Indicates whether the DataType is an array and how many dimensions the array has.

It may have the following values:

n > 1: The DataType is an array with the specified number of dimensions.
OneDimension (1): The DataType is an array with one dimension.
OneOrMoreDimensions (0): The dataType is an array with one or more dimensions.
Scalar (−1): The DataType is not an array.
Any (−2): The DataType can be a scalar or an array with any number of dimensions.
ScalarOrOneDimension (−3): The DataType can be a scalar or a one dimensional array.

Note: All DataTypes are considered to be scalar, even if they have array-like semantics like ByteString and String.

ArrayDimensions

Specifies the length of each dimension for an array dataType.

It is intended to describe the capability of the DataType, not the current size.

The number of elements shall be equal to the value of the valueRank. Shall be null if valueRank ≦ 0.

A value of 0 for an individual dimension indicates that the dimension has a variable length.

EnumValueType

A mapping between a value of an enumerated type and a name and description.

When this type is used in an array representing human readable representations of an enumeration, each Value shall be unique in that array.

Field	DataType	ValueRank	Description
Value	Int64	Scalar	The Integer representation of an Enumeration.
DisplayName	LocalizedText	Scalar	A human-readable representation of the Value of the Enumeration.
Description	LocalizedText	Scalar	A localized description of the enumeration value. More...

Description

A localized description of the enumeration value.

This field can contain an empty string if no description is available.

OptionSet

This abstract DataType is the base DataType for all DataTypes representing a bit mask.

All OptionSet DataTypes representing bit masks shall inherit from this DataType.

The DataType Nodes representing concrete subtypes of the OptionSet shall have an OptionSetValues Property.

Field	DataType	ValueRank	Description
Value	ByteString	Scalar	Array of bytes representing the bits in the option set. More...
ValidBits	ByteString	Scalar	Array of bytes with same size as value representing the valid bits in the value parameter. More...

Value

Array of bytes representing the bits in the option set.

The length of the ByteString depends on the number of bits.

ValidBits

Array of bytes with same size as value representing the valid bits in the value parameter.

When the Server returns the value to the Client, the ValidBits provides information of which bits in the bit mask have a meaning. When the Client passes the value to the Server, the ValidBits defines which bits should be written. Only those bits defined in ValidBits are changed in the bit mask, all others stay the same.

Union

This abstract DataType is the base DataType for all union DataTypes.

The DataType is a subtype of Structure DataType. All DataTypes inheriting from this DataType have special handling for the encoding as defined in Part 6 of the OPC UA Specification. All union DataTypes shall inherit from this DataType.

TimeZoneDataType

The local time that may or may not take daylight saving time into account.

Field	DataType	ValueRank	Description
Offset	Int16	Scalar	The offset in minutes from UtcTime.
DaylightSavingInOffset	Boolean	Scalar	If TRUE, daylight saving time (DST) is in effect and offset includes the DST correction. More...

DaylightSavingInOffset

If TRUE, daylight saving time (DST) is in effect and offset includes the DST correction.

If FALSE, the offset does not include the DST correction and DST may or may not have been in effect.

BuildInfo

Contains elements that describe the build information of the Server.

Field	DataType	ValueRank	Description
ProductUri	String	Scalar	URI that identifies the software.
ManufacturerName	String	Scalar	Name of the software manufacturer.
ProductName	String	Scalar	Name of the software.
SoftwareVersion	String	Scalar	Software version.
BuildNumber	String	Scalar	Build number.
BuildDate	DateTime	Scalar	Date and time of the build.

RedundancySupport

Defines the redundancy support of the Server.

Enum String	Enum Value	Description
None	0	There is no redundancy support.
Cold	1	The server supports cold redundancy as defined in Part 4 of the OPC UA Specification.
Warm	2	The server supports warm redundancy as defined in Part 4 of the OPC UA Specification.
Hot	3	The server supports hot redundancy as defined in Part 4 of the OPC UA Specification.
Transparent	4	The server supports transparent redundancy as defined in Part 4 of the OPC UA Specification.
HotAndMirrored	5	The server supports HotAndMirrored redundancy as defined in Part 4 of the OPC UA Specification.

ServerState

An enumeration that defines the execution state of the Server.

Enum String	Enum Value	Description
Running	0	The server is running normally. More...
Failed	1	A vendor-specific fatal error has occurred within the server. More...
NoConfiguration	2	The server is running but has no configuration information loaded and therefore does not transfer data.
Suspended	3	The server has been temporarily suspended by some vendor-specific method and is not receiving or sending data.
Shutdown	4	The server has shut down or is in the process of shutting down. More...
Test	5	The server is in Test Mode. More...
CommunicationFault	6	The server is running properly, but is having difficulty accessing data from its data sources. More...
Unknown	7	This state is used only to indicate that the OPC UA server does not know the state of underlying servers.

Running

The server is running normally.

This is the usual state for a server.

Failed

A vendor-specific fatal error has occurred within the server.

The server is no longer functioning. The recovery procedure from this situation is vendor-specific. Most Service requests should be expected to fail.

Shutdown

The server has shut down or is in the process of shutting down.

Depending on the implementation, this might or might not be visible to clients.

Test

The server is in Test Mode.

The outputs are disconnected from the real hardware, but the server will otherwise behave normally. Inputs may be real or may be simulated depending on the vendor implementation. StatusCode will generally be returned normally.

CommunicationFault

The server is running properly, but is having difficulty accessing data from its data sources.

This may be due to communication problems or some other problem preventing the underlying device, control system, etc. from returning valid data. It may be a complete failure, meaning that no data is available, or a partial failure, meaning that some data is still available. It is expected that items affected by the fault will individually return with a BAD FAILURE status code indication for the items.

RedundantServerDataType

Contains elements that describe the status of the Server.

Field	DataType	ValueRank	Description
ServerId	String	Scalar	The Id of the server (not the URI).
ServiceLevel	Byte	Scalar	The service level of the server.
ServerState	ServerState	Scalar	The current state of the server.

EndpointUrlListDataType

Structure representing a list of URLs of an Endpoint.

Field	DataType	ValueRank	Description
EndpointUrlList	String	Array	List of URLs of an Endpoint.

NetworkGroupDataType

Contains information on different network paths for one Server.

Field	DataType	ValueRank	Description
ServerUri	String	Scalar	URI of the Server represented by the network group.
NetworkPaths	EndpointUrlListDataType	Array	Array of different network paths to the server, for example provided by different network cards in a Server node. More...

NetworkPaths

Array of different network paths to the server, for example provided by different network cards in a Server node.

Each network path can have several Endpoints representing different protocol options for the same path.

SamplingIntervalDiagnosticsDataType

Contains diagnostic information about the sampling rates currently used by the Server.

Field	DataType	ValueRank
SamplingInterval	Double	Scalar
MonitoredItemCount	UInt32	Scalar
MaxMonitoredItemCount	UInt32	Scalar
DisabledMonitoredItemCount	UInt32	Scalar

ServerDiagnosticsSummaryDataType

Contains diagnostic summary information for the Server.

Field	DataType	ValueRank	Description
ServerViewCount	UInt32	Scalar	The number of server-created views in the server.
CurrentSessionCount	UInt32	Scalar	The number of client sessions currently established in the server.
CumulatedSessionCount	UInt32	Scalar	The cumulative number of client sessions that have been established in the server since the server was started (or restarted). More...
SecurityRejectedSessionCount	UInt32	Scalar	The number of client session establishment requests that were rejected due to security constraints since the server was started (or restarted).
RejectedSessionCount	UInt32	Scalar	The number of client session establishment requests that were rejected since the server was started (or restarted). More...
SessionTimeoutCount	UInt32	Scalar	The number of client sessions that were closed due to timeout since the server was started (or restarted).
SessionAbortCount	UInt32	Scalar	The number of client sessions that were closed due to errors since the server was started (or restarted).
CurrentSubscriptionCount	UInt32	Scalar	The number of subscriptions currently established in the server.
CumulatedSubscriptionCount	UInt32	Scalar	The cumulative number of subscriptions that have been established in the server since the server was started (or restarted). More...
PublishingIntervalCount	UInt32	Scalar	The number of publishing intervals currently supported in the server.
SecurityRejectedRequestsCount	UInt32	Scalar	The number of requests that were rejected due to security constraints since the server was started (or restarted). More...
RejectedRequestsCount	UInt32	Scalar	The number of requests that were rejected since the server was started (or restarted). More...

CumulatedSessionCount

The cumulative number of client sessions that have been established in the server since the server was started (or restarted).

This includes the currentSessionCount.

RejectedSessionCount

The number of client session establishment requests that were rejected since the server was started (or restarted).

This number includes the securityRejectedSessionCount.

CumulatedSubscriptionCount

The cumulative number of subscriptions that have been established in the server since the server was started (or restarted).

This includes the currentSubscriptionCount.

SecurityRejectedRequestsCount

The number of requests that were rejected due to security constraints since the server was started (or restarted).

The requests include all Services defined in Part 4 of the OPC UA Specification, also requests to create sessions.

RejectedRequestsCount

The number of requests that were rejected since the server was started (or restarted).

The requests include all Services defined in Part 4 of the OPC UA Specification, also requests to create sessions. This number includes the securityRejectedRequestsCount.

ServerStatusDataType

Contains elements that describe the status of the Server.

Field	DataType	ValueRank	Description
StartTime	DateTime	Scalar	Time (UTC) the server was started. More...
CurrentTime	DateTime	Scalar	The current time (UTC) as known by the server.
State	ServerState	Scalar	The current state of the server.
BuildInfo	BuildInfo	Scalar	Build information of the server.
SecondsTillShutdown	UInt32	Scalar	Approximate number of seconds until the server will be shut down. More...
ShutdownReason	LocalizedText	Scalar	An optional localized text indicating the reason for the shutdown. More...

StartTime

Time (UTC) the server was started.

This is constant for the server instance and is not reset when the server changes state. Each instance of a server should keep the time when the process started.

SecondsTillShutdown

Approximate number of seconds until the server will be shut down.

The value is only relevant once the state changes into SHUTDOWN.

ShutdownReason

An optional localized text indicating the reason for the shutdown.

The value is only relevant once the state changes into SHUTDOWN.

SessionDiagnosticsDataType

Contains diagnostic information about client sessions.

Most of the values represented in this structure provide information about the number of calls of a Service, the number of currently used MonitoredItems, etc. Those numbers need not provide the exact value; they need only provide the approximate number, so that the Server is not burdened with providing the exact numbers.

Field	DataType	ValueRank	Description
SessionId	NodeId	Scalar	Server-assigned identifier of the session.
SessionName	String	Scalar	The name of the session provided in the CreateSession request.
ClientDescription	ApplicationDescription	Scalar	The description provided by the client in the CreateSession request.
ServerUri	String	Scalar	The serverUri request in the CreateSession request.
EndpointUrl	String	Scalar	The endpointUrl passed by the client to the CreateSession request.
LocaleIds	String	Array	Array of LocaleIds specified by the client in the open session call.
ActualSessionTimeout	Double	Scalar	The requested session timeout specified by the client in the open session call.
MaxResponseMessageSize	UInt32	Scalar	The maximum size for the response message sent to the client.
ClientConnectionTime	DateTime	Scalar	The server timestamp when the client opens the session.
ClientLastContactTime	DateTime	Scalar	The server timestamp of the last request of the client in the context of the session.
CurrentSubscriptionsCount	UInt32	Scalar	The number of subscriptions currently used by the session.
CurrentMonitoredItemsCount	UInt32	Scalar	The number of MonitoredItems currently used by the session.
CurrentPublishRequestsInQueue	UInt32	Scalar	The number of publish timer expirations when there are data to be sent, but there are no publish requests for this session. More...
TotalRequestCount	ServiceCounterDataType	Scalar	Counter of allServices, identifying the number of received requests of any Services on the session.
UnauthorizedRequestCount	UInt32	Scalar	Counter of all Services, identifying the number of Service requests that were rejected due to authorization failure.
ReadCount	ServiceCounterDataType	Scalar	Counter of the Read Service, identifying the number of received requests of this Service on the session.
HistoryReadCount	ServiceCounterDataType	Scalar	Counter of the HistoryRead Service, identifying the number of received requests of this Service on the session.
WriteCount	ServiceCounterDataType	Scalar	Counter of the Write Service, identifying the number of received requests of this Service on the session.
HistoryUpdateCount	ServiceCounterDataType	Scalar	Counter of the HistoryUpdate Service, identifying the number of received requests of this Service on the session.
CallCount	ServiceCounterDataType	Scalar	Counter of the Call Service, identifying the number of received requests of this Service on the session.
CreateMonitoredItemsCount	ServiceCounterDataType	Scalar	Counter of the CreateMonitoredItems Service, identifying the number of received requests of this Service on the session.
ModifyMonitoredItemsCount	ServiceCounterDataType	Scalar	Counter of the ModifyMonitoredItems Service, identifying the number of received requests of this Service on the session.
SetMonitoringModeCount	ServiceCounterDataType	Scalar	Counter of the SetMonitoringMode Service, identifying the number of received requests of this Service on the session.
SetTriggeringCount	ServiceCounterDataType	Scalar	Counter of the SetTriggering Service, identifying the number of received requests of this Service on the session.
DeleteMonitoredItemsCount	ServiceCounterDataType	Scalar	Counter of the DeleteMonitoredItems Service, identifying the number of received requests of this Service on the session.
CreateSubscriptionCount	ServiceCounterDataType	Scalar	Counter of the CreateSubscription Service, identifying the number of received requests of this Service on the session.
ModifySubscriptionCount	ServiceCounterDataType	Scalar	Counter of the ModifySubscription Service, identifying the number of received requests of this Service on the session.
SetPublishingModeCount	ServiceCounterDataType	Scalar	Counter of the SetPublishingMode Service, identifying the number of received requests of this Service on the session.
PublishCount	ServiceCounterDataType	Scalar	Counter of the Publish Service, identifying the number of received requests of this Service on the session.
RepublishCount	ServiceCounterDataType	Scalar	Counter of the Republish Service, identifying the number of received requests of this Service on the session.
TransferSubscriptionsCount	ServiceCounterDataType	Scalar	Counter of the TransferSubscriptions Service, identifying the number of received requests of this Service on the session.
DeleteSubscriptionsCount	ServiceCounterDataType	Scalar	Counter of the DeleteSubscriptions Service, identifying the number of received requests of this Service on the session.
AddNodesCount	ServiceCounterDataType	Scalar	Counter of the AddNodes Service, identifying the number of received requests of this Service on the session.
AddReferencesCount	ServiceCounterDataType	Scalar	Counter of the AddReferences Service, identifying the number of received requests of this Service on the session.
DeleteNodesCount	ServiceCounterDataType	Scalar	Counter of the DeleteNodes Service, identifying the number of received requests of this Service on the session.
DeleteReferencesCount	ServiceCounterDataType	Scalar	Counter of the DeleteReferences Service, identifying the number of received requests of this Service on the session.
BrowseCount	ServiceCounterDataType	Scalar	Counter of the Browse Service, identifying the number of received requests of this Service on the session.
BrowseNextCount	ServiceCounterDataType	Scalar	Counter of the BrowseNext Service, identifying the number of received requests of this Service on the session.
TranslateBrowsePathsToNodeIdsCount	ServiceCounterDataType	Scalar	Counter of the TranslateBrowsePathsToNodeIds Service, identifying the number of received requests of this Service on the session.
QueryFirstCount	ServiceCounterDataType	Scalar	Counter of the QueryFirst Service, identifying the number of received requests of this Service on the session.
QueryNextCount	ServiceCounterDataType	Scalar	Counter of the QueryNext Service, identifying the number of received requests of this Service on the session.
RegisterNodesCount	ServiceCounterDataType	Scalar	Counter of the RegisterNodes Service, identifying the number of received requests of this Service on the session.
UnregisterNodesCount	ServiceCounterDataType	Scalar	Counter of the UnregisterNodesService, identifying the number of received requests of this Service on the session.

CurrentPublishRequestsInQueue

The number of publish timer expirations when there are data to be sent, but there are no publish requests for this session.

The value shall be 0 if there are no data to be sent or publish requests queued.

SessionSecurityDiagnosticsDataType

contains security-related diagnostic information about client sessions.

Because this information is security-related, it should not be made accessible to all users, but only to authorised users.

Field	DataType	ValueRank	Description
SessionId	NodeId	Scalar	Server-assigned identifier of the session.
ClientUserIdOfSession	String	Scalar	Name of authenticated user when creating the session.
ClientUserIdHistory	String	Array	Array containing the name of the authenticated user currently active (either from creating the session or from calling the ActivateSession Service) and the history of those names. More...
AuthenticationMechanism	String	Scalar	Type of authentication currently used by the session. The string shall be one of the UserIdentityTokenType enum.
Encoding	String	Scalar	Which encoding is used on the wire. More...
TransportProtocol	String	Scalar	Which transport protocol is used. More...
SecurityMode	MessageSecurityMode	Scalar	The message security mode used for the session.
SecurityPolicyUri	String	Scalar	The name of the security policy used for the session.
ClientCertificate	ByteString	Scalar	The application instance certificate provided by the client in the CreateSession request.

ClientUserIdHistory

Array containing the name of the authenticated user currently active (either from creating the session or from calling the ActivateSession Service) and the history of those names.

Each time the active user changes, an entry shall be made at the end of the array. The active user is always at the end of the array. Servers may restrict the size of this array, but shall support at least a size of 2.

Encoding

Which encoding is used on the wire.

The string shall be “XML” or “UA Binary”.

TransportProtocol

Which transport protocol is used.

The string shall be the scheme from the URL used to establish the session, for example “opc.tcp” or “https”.

ServiceCounterDataType

Contains diagnostic information about subscriptions.

Field	DataType	ValueRank	Description
TotalCount	UInt32	Scalar	The number of Service requests that have been received.
ErrorCount	UInt32	Scalar	The total number of Service requests that were rejected.

SubscriptionDiagnosticsDataType

Contains diagnostic information about subscriptions.

Field	DataType	ValueRank	Description
SessionId	NodeId	Scalar	Server-assigned identifier of the session the subscription belongs to.
SubscriptionId	UInt32	Scalar	Server-assigned identifier of the subscription.
Priority	Byte	Scalar	The priority the client assigned to the subscription.
PublishingInterval	Double	Scalar	The publishing interval of the subscription in milliseconds.
MaxKeepAliveCount	UInt32	Scalar	The maximum keep-alive count of the subscription.
MaxLifetimeCount	UInt32	Scalar	The maximum lifetime count of the subscription.
MaxNotificationsPerPublish	UInt32	Scalar	The maximum number of notifications per publish response.
PublishingEnabled	Boolean	Scalar	Whether publishing is enabled for the subscription.
ModifyCount	UInt32	Scalar	The number of ModifySubscription requests received for the subscription.
EnableCount	UInt32	Scalar	The number of times the subscription has been enabled.
DisableCount	UInt32	Scalar	The number of times the subscription has been disabled.
RepublishRequestCount	UInt32	Scalar	The number of Republish Service requests that have been received and processed for the subscription.
RepublishMessageRequestCount	UInt32	Scalar	The total number of messages that have been requested to be republished for the subscription. More...
RepublishMessageCount	UInt32	Scalar	The number of messages that have been successfully republished for the subscription.
TransferRequestCount	UInt32	Scalar	The total number of TransferSubscriptions Service requests that have been received for the subscription.
TransferredToAltClientCount	UInt32	Scalar	The number of times the subscription has been transferred to an alternate client.
TransferredToSameClientCount	UInt32	Scalar	The number of times the subscription has been transferred to an alternate session for the same client.
PublishRequestCount	UInt32	Scalar	The number of Publish Service requests that have been received and processed for the subscription.
DataChangeNotificationsCount	UInt32	Scalar	The number of data change Notifications sent by the subscription.
EventNotificationsCount	UInt32	Scalar	The number of Event Notifications sent by the subscription.
NotificationsCount	UInt32	Scalar	The total number of Notifications sent by the subscription.
LatePublishRequestCount	UInt32	Scalar	The number of times the subscription has entered the LATE State, i.e. the number of times the publish timer expires and there are unsent notifications.
CurrentKeepAliveCount	UInt32	Scalar	The number of times the subscription has entered the KEEPALIVE State.
CurrentLifetimeCount	UInt32	Scalar	The current lifetime count of the subscription.
UnacknowledgedMessageCount	UInt32	Scalar	The number of unacknowledged messages saved in the republish queue.
DiscardedMessageCount	UInt32	Scalar	The number of messages that were discarded before they were acknowledged.
MonitoredItemCount	UInt32	Scalar	The total number of monitored items of the subscription, including the disabled monitored items.
DisabledMonitoredItemCount	UInt32	Scalar	The number of disabled monitored items of the subscription.
MonitoringQueueOverflowCount	UInt32	Scalar	The number of times a monitored item dropped notifications because of a queue overflow.
NextSequenceNumber	UInt32	Scalar	Sequence number for the next notification message.
EventQueueOverFlowCount	UInt32	Scalar	The number of times a monitored item in the subscription has generated an Event of type EventQueueOverflowEventType.

RepublishMessageRequestCount

The total number of messages that have been requested to be republished for the subscription.

Note that due to the design of the Republish Service this number is always equal to the republishRequestCount.

ModelChangeStructureDataType

Contains elements that describe changes of the model.

Field	DataType	ValueRank	Description
Affected	NodeId	Scalar	NodeId of the Node that was changed. More...
AffectedType	NodeId	Scalar	If the affected Node was an object or Variable, affectedType contains the NodeId of the TypeDefinitionNode of the affected Node. Otherwise it is set to null.
Verb	Byte	Scalar	Describes the changes happening to the affected Node. More...

Affected

NodeId of the Node that was changed.

The client should assume that the affected Node has been created or deleted, had a Reference added or deleted, or the DataType has changed as described by the verb.

Verb

Describes the changes happening to the affected Node.

The verb is an 8-bit unsigned integer used as bit mask with the structure defined in the following table:

Field	Bit	Description
NodeAdded	0	Indicates the affected Node has been added.
NodeDeleted	1	Indicates the affected Node has been deleted.
ReferenceAdded	2	Indicates a Reference has been added. The affected Node may be either a SourceNode or TargetNode. Note that an added bidirectional Reference is reflected by two ChangeStructures.
ReferenceDeleted	3	Indicates a Reference has been deleted. The affected Node may be either a SourceNode or TargetNode. Note that a deleted bidirectional Reference is reflected by two ChangeStructures.
DataTypeChanged	4	This verb may be used only for affected Nodes that are Variables or VariableTypes. It indicates that the DataType Attribute has changed.
Reserved	5:7	Reserved for future use. Shall always be zero.

A verb may identify several changes on the affected Node at once. This feature should be used if event compression is used.

Note that all verbs shall always be considered in the context where the ModelChangeStructureDataType is used. A NodeDeleted may indicate that a Node was removed from a view but still exists in other Views.

SemanticChangeStructureDataType

Contains elements that describe a change of the model.

Field	DataType	ValueRank	Description
Affected	NodeId	Scalar	NodeId of the Node that owns the Property that has changed.
AffectedType	NodeId	Scalar	If the affected Node was an object or Variable, affectedType contains the NodeId of the TypeDefinitionNode of the affected Node. More...

AffectedType

If the affected Node was an object or Variable, affectedType contains the NodeId of the TypeDefinitionNode of the affected Node.

Otherwise it is set to null.