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QOpcUa Namespace

The QOpcUa namespace contains miscellaneous identifiers used throughout the Qt OPC UA library. More...

Header: #include <QOpcUa>


namespace NodeIds


flags AccessLevel
enum class AccessLevelBit { None, CurrentRead, CurrentWrite, HistoryRead, HistoryWrite, …, TimestampWrite }
enum class AxisScale { Linear, Log, Ln }
enum class ErrorCategory { NoError, NodeError, AttributeError, PermissionError, ArgumentError, …, UnspecifiedError }
flags EventNotifier
enum class EventNotifierBit { None, SubscribeToEvents, HistoryRead, HistoryWrite }
enum class NodeAttribute { None, NodeId, NodeClass, BrowseName, DisplayName, …, UserExecutable }
flags NodeAttributes
enum class NodeClass { Undefined, Object, Variable, Method, ObjectType, …, View }
flags NodeClasses
enum class ReferenceTypeId { Unspecified, References, NonHierarchicalReferences, HierarchicalReferences, HasChild, …, AliasFor }
enum Types { Boolean, Int32, UInt32, Double, Float, …, Undefined }
enum UaStatusCode { Good, BadUnexpectedError, BadInternalError, BadOutOfMemory, BadResourceUnavailable, …, BadMaxConnectionsReached }
flags WriteMask
enum class WriteMaskBit { None, AccessLevel, ArrayDimensions, BrowseName, ContainsNoLoops, …, ValueForVariableType }


QOpcUa::ErrorCategory errorCategory(QOpcUa::UaStatusCode statusCode)
bool isSecurePolicy(const QString &securityPolicy)
bool isSuccessStatus(QOpcUa::UaStatusCode statusCode)
QOpcUa::Types metaTypeToQOpcUaType(QMetaType::Type type)
QString namespace0Id(QOpcUa::NodeIds::Namespace0 id)
QOpcUa::NodeIds::Namespace0 namespace0IdFromNodeId(const QString &nodeId)
QString namespace0IdName(QOpcUa::NodeIds::Namespace0 id)
bool nodeIdEquals(const QString &first, const QString &second)
QString nodeIdFromByteString(quint16 ns, const QByteArray &identifier)
QString nodeIdFromGuid(quint16 ns, const QUuid &identifier)
QString nodeIdFromInteger(quint16 ns, quint32 identifier)
QString nodeIdFromReferenceType(QOpcUa::ReferenceTypeId referenceType)
QString nodeIdFromString(quint16 ns, const QString &identifier)
bool nodeIdStringSplit(const QString &nodeIdString, quint16 *nsIndex, QString *identifier, char *identifierType)
size_t qHash(const QOpcUa::NodeAttribute &attr)
QString statusToString(QOpcUa::UaStatusCode statusCode)

Detailed Description


namespace QOpcUa::NodeIds

Type Documentation

enum class QOpcUa::AccessLevelBit
flags QOpcUa::AccessLevel

This enum contains all possible bits for the AccessLevel and UserAccessLevel node attributes defined in OPC-UA part 3, Table 8.

Constant Value Description
QOpcUa::AccessLevelBit::None 0 No read access to the Value attribute is permitted.
QOpcUa::AccessLevelBit::CurrentRead (1 << 0) The current value can be read.
QOpcUa::AccessLevelBit::CurrentWrite (1 << 1) The current value can be written.
QOpcUa::AccessLevelBit::HistoryRead (1 << 2) The history of the value is readable.
QOpcUa::AccessLevelBit::HistoryWrite (1 << 3) The history of the value is writable.
QOpcUa::AccessLevelBit::SemanticChange (1 << 4) The property variable generates SemanticChangeEvents.
QOpcUa::AccessLevelBit::StatusWrite (1 << 5) The status code of the value is writable.
QOpcUa::AccessLevelBit::TimestampWrite (1 << 6) The SourceTimestamp is writable.

The AccessLevel type is a typedef for QFlags<AccessLevelBit>. It stores an OR combination of AccessLevelBit values.

enum class QOpcUa::AxisScale

The AxisScale enum as defined by OPC-UA part 8, 5.6.7.

Constant Value
QOpcUa::AxisScale::Linear 0
QOpcUa::AxisScale::Log 1
QOpcUa::AxisScale::Ln 2

enum class QOpcUa::ErrorCategory

This enum contains simplified categories for OPC UA errors.

Constant Value Description
QOpcUa::ErrorCategory::NoError 0 The operation has been successful.
QOpcUa::ErrorCategory::NodeError 1 There is a problem with the node, e. g. it does not exist.
QOpcUa::ErrorCategory::AttributeError 2 The attributes to operate on where invalid.
QOpcUa::ErrorCategory::PermissionError 3 The user did not have the permission to perform the operation.
QOpcUa::ErrorCategory::ArgumentError 4 The arguments supplied by the user were invalid or incomplete.
QOpcUa::ErrorCategory::TypeError 5 There has been a type mismatch for a write operation.
QOpcUa::ErrorCategory::ConnectionError 6 Communication with the server did not work as expected.
QOpcUa::ErrorCategory::UnspecifiedError 7 Any error that is not categorized. The detailed status code must be checked.

enum class QOpcUa::EventNotifierBit
flags QOpcUa::EventNotifier

This enum contains all possible bits for the EventNotifier node attribute defined in OPC-UA part 3, Table 6.

Constant Value Description
QOpcUa::EventNotifierBit::None 0 The node can't be used to interact with events.
QOpcUa::EventNotifierBit::SubscribeToEvents (1 << 0) A client can subscribe to events.
QOpcUa::EventNotifierBit::HistoryRead (1 << 2) A client can read the event history.
QOpcUa::EventNotifierBit::HistoryWrite (1 << 3) A client can write the event history.

The EventNotifier type is a typedef for QFlags<EventNotifierBit>. It stores an OR combination of EventNotifierBit values.

enum class QOpcUa::NodeAttribute
flags QOpcUa::NodeAttributes

This enum contains the 22 node attributes defined in OPC-UA part 4, 5.

Constant Value Description
QOpcUa::NodeAttribute::None 0 No node attribute.
QOpcUa::NodeAttribute::NodeId (1 << 0) Mandatory for all nodes. Contains the node's id in the OPC UA address space.
QOpcUa::NodeAttribute::NodeClass (1 << 1) Mandatory for all nodes. Contains the node id describing the node class of the node.
QOpcUa::NodeAttribute::BrowseName (1 << 2) Mandatory for all nodes. Contains a non-localized human readable name of the node.
QOpcUa::NodeAttribute::DisplayName (1 << 3) Mandatory for all nodes. Contains a localized human readable name for display purposes.
QOpcUa::NodeAttribute::Description (1 << 4) Contains a localized human readable description of the node.
QOpcUa::NodeAttribute::WriteMask (1 << 5) Contains a bit mask. Each bit corresponds to a writable attribute (OPC-UA part 3, Table 3).
QOpcUa::NodeAttribute::UserWriteMask (1 << 6) Same as WriteMask but for the current user.
QOpcUa::NodeAttribute::IsAbstract (1 << 7) True if the node is an abstract type which means that no nodes of this type shall exist.
QOpcUa::NodeAttribute::Symmetric (1 << 8) True if a reference's meaning is the same seen from both ends.
QOpcUa::NodeAttribute::InverseName (1 << 9) The localized inverse name of a reference (for example "HasSubtype" has the InverseName "SubtypeOf").
QOpcUa::NodeAttribute::ContainsNoLoops (1 << 10) True if there is no way to get back to a node following forward references in the current view.
QOpcUa::NodeAttribute::EventNotifier (1 << 11) Contains a bit mask used to indicate if subscribing to events and access to historic events is supported (OPC-UA part 3, Table 5).
QOpcUa::NodeAttribute::Value (1 << 12) The value of a Variable node.
QOpcUa::NodeAttribute::DataType (1 << 13) The NodeId of the Value attribute's data type (for example "ns=0;i=13" for DateTime, see https://opcfoundation.org/UA/schemas/1.03/NodeIds.csv).
QOpcUa::NodeAttribute::ValueRank (1 << 14) Contains information about the structure of the Value attribute (scalar/array) (OPC-UA part 3, Table 8).
QOpcUa::NodeAttribute::ArrayDimensions (1 << 15) An array containing the length for each dimension of a multi-dimensional array.
QOpcUa::NodeAttribute::AccessLevel (1 << 16) Contains a bit mask. Each bit corresponds to an access capability (OPC-UA part 3, Table 8).
QOpcUa::NodeAttribute::UserAccessLevel (1 << 17) Same as AccessLevel, but for the current user.
QOpcUa::NodeAttribute::MinimumSamplingInterval (1 << 18) Contains the shortest possible interval in which the server is able to sample the value.
QOpcUa::NodeAttribute::Historizing (1 << 19) True if historical data is collected.
QOpcUa::NodeAttribute::Executable (1 << 20) True if the node is currently executable. Only relevant for Method nodes.
QOpcUa::NodeAttribute::UserExecutable (1 << 21) Same as Executable, but for the current user.

The NodeAttributes type is a typedef for QFlags<NodeAttribute>. It stores an OR combination of NodeAttribute values.

enum class QOpcUa::NodeClass
flags QOpcUa::NodeClasses

This enum specifies the class a node belongs to. OPC-UA specifies a fixed set of eight different classes.

Constant Value Description
QOpcUa::NodeClass::Undefined 0 The node class is not known. This is the case before the NodeClass attribute has been read on the server.
QOpcUa::NodeClass::Object 1 An Object node.
QOpcUa::NodeClass::Variable 2 A Variable node.
QOpcUa::NodeClass::Method 4 A Method node.
QOpcUa::NodeClass::ObjectType 8 An ObjectType node.
QOpcUa::NodeClass::VariableType 16 A VariableType node.
QOpcUa::NodeClass::ReferenceType 32 A ReferenceType node.
QOpcUa::NodeClass::DataType 64 A DataType node.
QOpcUa::NodeClass::View 128 A View node.

The NodeClasses type is a typedef for QFlags<NodeClass>. It stores an OR combination of NodeClass values.

enum class QOpcUa::ReferenceTypeId

This enum contains the reference types specified in OPC-UA part 3, 7. They are used to filter for a certain reference type in QOpcUaNode::browseChildren and for the reference type information in QOpcUaReferenceDescription.

Constant Value Description
QOpcUa::ReferenceTypeId::Unspecified 0 Not a valid reference type.
QOpcUa::ReferenceTypeId::References 31 The abstract base type for all references.
QOpcUa::ReferenceTypeId::NonHierarchicalReferences 32 The abstract base type for all non-hierarchical references.
QOpcUa::ReferenceTypeId::HierarchicalReferences 33 The abstract base type for all hierarchical references.
QOpcUa::ReferenceTypeId::HasChild 34 The abstract base type for all non-looping hierarchical references.
QOpcUa::ReferenceTypeId::Organizes 35 The type for hierarchical references that are used to organize nodes.
QOpcUa::ReferenceTypeId::HasEventSource 36 The type for non-looping hierarchical references that are used to organize event sources.
QOpcUa::ReferenceTypeId::HasModellingRule 37 The type for references from instance declarations to modelling rule nodes.
QOpcUa::ReferenceTypeId::HasEncoding 38 The type for references from data type nodes to to data type encoding nodes.
QOpcUa::ReferenceTypeId::HasDescription 39 The type for references from data type encoding nodes to data type description nodes.
QOpcUa::ReferenceTypeId::HasTypeDefinition 40 The type for references from a instance node to its type definition node.
QOpcUa::ReferenceTypeId::GeneratesEvent 41 The type for references from a node to an event type that is raised by node.
QOpcUa::ReferenceTypeId::Aggregates 44 The type for non-looping hierarchical references that are used to aggregate nodes into complex types.
QOpcUa::ReferenceTypeId::HasSubtype 45 The type for non-looping hierarchical references that are used to define sub types.
QOpcUa::ReferenceTypeId::HasProperty 46 The type for non-looping hierarchical reference from a node to its property.
QOpcUa::ReferenceTypeId::HasComponent 47 The type for non-looping hierarchical reference from a node to its component.
QOpcUa::ReferenceTypeId::HasNotifier 48 The type for non-looping hierarchical references that are used to indicate how events propagate from node to node.
QOpcUa::ReferenceTypeId::HasOrderedComponent 49 The type for non-looping hierarchical reference from a node to its component when the order of references matters.
QOpcUa::ReferenceTypeId::FromState 51 The type for a reference to the state before a transition.
QOpcUa::ReferenceTypeId::ToState 52 The type for a reference to the state after a transition.
QOpcUa::ReferenceTypeId::HasCause 53 The type for a reference to a method that can cause a transition to occur.
QOpcUa::ReferenceTypeId::HasEffect 54 The type for a reference to an event that may be raised when a transition occurs.
QOpcUa::ReferenceTypeId::HasHistoricalConfiguration 56 The type for a reference to the historical configuration for a data variable.
QOpcUa::ReferenceTypeId::HasSubStateMachine 117 The type for a reference to a substate for a state.
QOpcUa::ReferenceTypeId::HasArgumentDescription 129 The type for a reference to an argument description
QOpcUa::ReferenceTypeId::HasOptionalInputArgumentDescription 131 The type for a reference to an optional input argument description
QOpcUa::ReferenceTypeId::AlwaysGeneratesEvent 3065 The type for references from a node to an event type that is always raised by node.
QOpcUa::ReferenceTypeId::HasTrueSubState 9004 The type for references from a TRUE super state node to a subordinate state node.
QOpcUa::ReferenceTypeId::HasFalseSubState 9005 The type for references from a FALSE super state node to a subordinate state node.
QOpcUa::ReferenceTypeId::HasCondition 9006 The type for references from a ConditionSource node to a Condition.
QOpcUa::ReferenceTypeId::HasPubSubConnection 14476 The type for a reference to a PubSub connection
QOpcUa::ReferenceTypeId::DataSetToWriter 14936 The type for a reference to a data set writer
QOpcUa::ReferenceTypeId::HasGuard 15112 The type for a reference to a guard
QOpcUa::ReferenceTypeId::HasDataSetWriter 15296 The type for a reference to a data set writer
QOpcUa::ReferenceTypeId::HasDataSetReader 15297 The type for a reference to data set reader
QOpcUa::ReferenceTypeId::HasAlarmSuppressionGroup 16361 The type for a reference to an alarm suppression group
QOpcUa::ReferenceTypeId::AlarmGroupMember 16362 The type for a reference to an alarm group member
QOpcUa::ReferenceTypeId::HasEffectDisable 17276 The type for a reference to an alarm which is disabled by a transition
QOpcUa::ReferenceTypeId::HasDictionaryEntry 17597 The type for a reference to a dictionary entry
QOpcUa::ReferenceTypeId::HasInterface 17603 The type for a reference to an interface
QOpcUa::ReferenceTypeId::HasAddIn 17604 The type for a reference to an addin
QOpcUa::ReferenceTypeId::HasEffectEnable 17983 The type for a reference to an alarm which is enabled by a transition
QOpcUa::ReferenceTypeId::HasEffectSuppressed 17984 The type for a reference to an alarm which is suppressed by a transition
QOpcUa::ReferenceTypeId::HasEffectUnsuppressed 17985 The type for a reference to an alarm which is unsuppressed by a transition
QOpcUa::ReferenceTypeId::HasWriterGroup 18804 The type for a reference to a writer group
QOpcUa::ReferenceTypeId::HasReaderGroup 18805 The type for a reference to a reader group
QOpcUa::ReferenceTypeId::AliasFor 23469 The type for a reference to the node represented by an alias


This is QPair<QVariant, QOpcUa::Types>.

enum QOpcUa::Types

Enumerates the types supported by Qt OPC UA.

Constant Value Description
QOpcUa::Boolean 0  
QOpcUa::Int32 1  
QOpcUa::UInt32 2  
QOpcUa::Double 3  
QOpcUa::Float 4  
QOpcUa::String 5  
QOpcUa::LocalizedText 6  
QOpcUa::DateTime 7  
QOpcUa::UInt16 8  
QOpcUa::Int16 9  
QOpcUa::UInt64 10  
QOpcUa::Int64 11  
QOpcUa::Byte 12  
QOpcUa::SByte 13  
QOpcUa::ByteString 14  
QOpcUa::XmlElement 15  
QOpcUa::NodeId 16  
QOpcUa::Guid 17  
QOpcUa::QualifiedName 18 A name qualified by an OPC UA namespace index.
QOpcUa::StatusCode 19  
QOpcUa::ExtensionObject 20 A data structure which contains a serialized object.
QOpcUa::Range 21 A range composed from the two double values low and high.
QOpcUa::EUInformation 22 The unit of measurement for an analog value.
QOpcUa::ComplexNumber 23 The OPC UA ComplexNumber type.
QOpcUa::DoubleComplexNumber 24 The OPC UA DoubleComplexNumber type.
QOpcUa::AxisInformation 25 Information about an axis.
QOpcUa::XV 26 A float value with a double precision position on an axis.
QOpcUa::ExpandedNodeId 27 A node id with additional namespace URI and server index.
QOpcUa::Argument 28 The OPC UA Argument type.
QOpcUa::Undefined 0xFFFFFFFF  

enum QOpcUa::UaStatusCode

Enumerates all status codes from https://opcfoundation.org/UA/schemas/1.03/Opc.Ua.StatusCodes.csv

Constant Value
QOpcUa::Good 0
QOpcUa::BadUnexpectedError 0x80010000
QOpcUa::BadInternalError 0x80020000
QOpcUa::BadOutOfMemory 0x80030000
QOpcUa::BadResourceUnavailable 0x80040000
QOpcUa::BadCommunicationError 0x80050000
QOpcUa::BadEncodingError 0x80060000
QOpcUa::BadDecodingError 0x80070000
QOpcUa::BadEncodingLimitsExceeded 0x80080000
QOpcUa::BadRequestTooLarge 0x80B80000
QOpcUa::BadResponseTooLarge 0x80B90000
QOpcUa::BadUnknownResponse 0x80090000
QOpcUa::BadTimeout 0x800A0000
QOpcUa::BadServiceUnsupported 0x800B0000
QOpcUa::BadShutdown 0x800C0000
QOpcUa::BadServerNotConnected 0x800D0000
QOpcUa::BadServerHalted 0x800E0000
QOpcUa::BadNothingToDo 0x800F0000
QOpcUa::BadTooManyOperations 0x80100000
QOpcUa::BadTooManyMonitoredItems 0x80DB0000
QOpcUa::BadDataTypeIdUnknown 0x80110000
QOpcUa::BadCertificateInvalid 0x80120000
QOpcUa::BadSecurityChecksFailed 0x80130000
QOpcUa::BadCertificateTimeInvalid 0x80140000
QOpcUa::BadCertificateIssuerTimeInvalid 0x80150000
QOpcUa::BadCertificateHostNameInvalid 0x80160000
QOpcUa::BadCertificateUriInvalid 0x80170000
QOpcUa::BadCertificateUseNotAllowed 0x80180000
QOpcUa::BadCertificateIssuerUseNotAllowed 0x80190000
QOpcUa::BadCertificateUntrusted 0x801A0000
QOpcUa::BadCertificateRevocationUnknown 0x801B0000
QOpcUa::BadCertificateIssuerRevocationUnknown 0x801C0000
QOpcUa::BadCertificateRevoked 0x801D0000
QOpcUa::BadCertificateIssuerRevoked 0x801E0000
QOpcUa::BadCertificateChainIncomplete 0x810D0000
QOpcUa::BadUserAccessDenied 0x801F0000
QOpcUa::BadIdentityTokenInvalid 0x80200000
QOpcUa::BadIdentityTokenRejected 0x80210000
QOpcUa::BadSecureChannelIdInvalid 0x80220000
QOpcUa::BadInvalidTimestamp 0x80230000
QOpcUa::BadNonceInvalid 0x80240000
QOpcUa::BadSessionIdInvalid 0x80250000
QOpcUa::BadSessionClosed 0x80260000
QOpcUa::BadSessionNotActivated 0x80270000
QOpcUa::BadSubscriptionIdInvalid 0x80280000
QOpcUa::BadRequestHeaderInvalid 0x802A0000
QOpcUa::BadTimestampsToReturnInvalid 0x802B0000
QOpcUa::BadRequestCancelledByClient 0x802C0000
QOpcUa::BadTooManyArguments 0x80E50000
QOpcUa::GoodSubscriptionTransferred 0x002D0000
QOpcUa::GoodCompletesAsynchronously 0x002E0000
QOpcUa::GoodOverload 0x002F0000
QOpcUa::GoodClamped 0x00300000
QOpcUa::BadNoCommunication 0x80310000
QOpcUa::BadWaitingForInitialData 0x80320000
QOpcUa::BadNodeIdInvalid 0x80330000
QOpcUa::BadNodeIdUnknown 0x80340000
QOpcUa::BadAttributeIdInvalid 0x80350000
QOpcUa::BadIndexRangeInvalid 0x80360000
QOpcUa::BadIndexRangeNoData 0x80370000
QOpcUa::BadDataEncodingInvalid 0x80380000
QOpcUa::BadDataEncodingUnsupported 0x80390000
QOpcUa::BadNotReadable 0x803A0000
QOpcUa::BadNotWritable 0x803B0000
QOpcUa::BadOutOfRange 0x803C0000
QOpcUa::BadNotSupported 0x803D0000
QOpcUa::BadNotFound 0x803E0000
QOpcUa::BadObjectDeleted 0x803F0000
QOpcUa::BadNotImplemented 0x80400000
QOpcUa::BadMonitoringModeInvalid 0x80410000
QOpcUa::BadMonitoredItemIdInvalid 0x80420000
QOpcUa::BadMonitoredItemFilterInvalid 0x80430000
QOpcUa::BadMonitoredItemFilterUnsupported 0x80440000
QOpcUa::BadFilterNotAllowed 0x80450000
QOpcUa::BadStructureMissing 0x80460000
QOpcUa::BadEventFilterInvalid 0x80470000
QOpcUa::BadContentFilterInvalid 0x80480000
QOpcUa::BadFilterOperatorInvalid 0x80C10000
QOpcUa::BadFilterOperatorUnsupported 0x80C20000
QOpcUa::BadFilterOperandCountMismatch 0x80C30000
QOpcUa::BadFilterOperandInvalid 0x80490000
QOpcUa::BadFilterElementInvalid 0x80C40000
QOpcUa::BadFilterLiteralInvalid 0x80C50000
QOpcUa::BadContinuationPointInvalid 0x804A0000
QOpcUa::BadNoContinuationPoints 0x804B0000
QOpcUa::BadReferenceTypeIdInvalid 0x804C0000
QOpcUa::BadBrowseDirectionInvalid 0x804D0000
QOpcUa::BadNodeNotInView 0x804E0000
QOpcUa::BadServerUriInvalid 0x804F0000
QOpcUa::BadServerNameMissing 0x80500000
QOpcUa::BadDiscoveryUrlMissing 0x80510000
QOpcUa::BadSempahoreFileMissing 0x80520000
QOpcUa::BadRequestTypeInvalid 0x80530000
QOpcUa::BadSecurityModeRejected 0x80540000
QOpcUa::BadSecurityPolicyRejected 0x80550000
QOpcUa::BadTooManySessions 0x80560000
QOpcUa::BadUserSignatureInvalid 0x80570000
QOpcUa::BadApplicationSignatureInvalid 0x80580000
QOpcUa::BadNoValidCertificates 0x80590000
QOpcUa::BadIdentityChangeNotSupported 0x80C60000
QOpcUa::BadRequestCancelledByRequest 0x805A0000
QOpcUa::BadParentNodeIdInvalid 0x805B0000
QOpcUa::BadReferenceNotAllowed 0x805C0000
QOpcUa::BadNodeIdRejected 0x805D0000
QOpcUa::BadNodeIdExists 0x805E0000
QOpcUa::BadNodeClassInvalid 0x805F0000
QOpcUa::BadBrowseNameInvalid 0x80600000
QOpcUa::BadBrowseNameDuplicated 0x80610000
QOpcUa::BadNodeAttributesInvalid 0x80620000
QOpcUa::BadTypeDefinitionInvalid 0x80630000
QOpcUa::BadSourceNodeIdInvalid 0x80640000
QOpcUa::BadTargetNodeIdInvalid 0x80650000
QOpcUa::BadDuplicateReferenceNotAllowed 0x80660000
QOpcUa::BadInvalidSelfReference 0x80670000
QOpcUa::BadReferenceLocalOnly 0x80680000
QOpcUa::BadNoDeleteRights 0x80690000
QOpcUa::UncertainReferenceNotDeleted 0x40BC0000
QOpcUa::BadServerIndexInvalid 0x806A0000
QOpcUa::BadViewIdUnknown 0x806B0000
QOpcUa::BadViewTimestampInvalid 0x80C90000
QOpcUa::BadViewParameterMismatch 0x80CA0000
QOpcUa::BadViewVersionInvalid 0x80CB0000
QOpcUa::UncertainNotAllNodesAvailable 0x40C00000
QOpcUa::GoodResultsMayBeIncomplete 0x00BA0000
QOpcUa::BadNotTypeDefinition 0x80C80000
QOpcUa::UncertainReferenceOutOfServer 0x406C0000
QOpcUa::BadTooManyMatches 0x806D0000
QOpcUa::BadQueryTooComplex 0x806E0000
QOpcUa::BadNoMatch 0x806F0000
QOpcUa::BadMaxAgeInvalid 0x80700000
QOpcUa::BadSecurityModeInsufficient 0x80E60000
QOpcUa::BadHistoryOperationInvalid 0x80710000
QOpcUa::BadHistoryOperationUnsupported 0x80720000
QOpcUa::BadInvalidTimestampArgument 0x80BD0000
QOpcUa::BadWriteNotSupported 0x80730000
QOpcUa::BadTypeMismatch 0x80740000
QOpcUa::BadMethodInvalid 0x80750000
QOpcUa::BadArgumentsMissing 0x80760000
QOpcUa::BadTooManySubscriptions 0x80770000
QOpcUa::BadTooManyPublishRequests 0x80780000
QOpcUa::BadNoSubscription 0x80790000
QOpcUa::BadSequenceNumberUnknown 0x807A0000
QOpcUa::BadMessageNotAvailable 0x807B0000
QOpcUa::BadInsufficientClientProfile 0x807C0000
QOpcUa::BadStateNotActive 0x80BF0000
QOpcUa::BadTcpServerTooBusy 0x807D0000
QOpcUa::BadTcpMessageTypeInvalid 0x807E0000
QOpcUa::BadTcpSecureChannelUnknown 0x807F0000
QOpcUa::BadTcpMessageTooLarge 0x80800000
QOpcUa::BadTcpNotEnoughResources 0x80810000
QOpcUa::BadTcpInternalError 0x80820000
QOpcUa::BadTcpEndpointUrlInvalid 0x80830000
QOpcUa::BadRequestInterrupted 0x80840000
QOpcUa::BadRequestTimeout 0x80850000
QOpcUa::BadSecureChannelClosed 0x80860000
QOpcUa::BadSecureChannelTokenUnknown 0x80870000
QOpcUa::BadSequenceNumberInvalid 0x80880000
QOpcUa::BadProtocolVersionUnsupported 0x80BE0000
QOpcUa::BadConfigurationError 0x80890000
QOpcUa::BadNotConnected 0x808A0000
QOpcUa::BadDeviceFailure 0x808B0000
QOpcUa::BadSensorFailure 0x808C0000
QOpcUa::BadOutOfService 0x808D0000
QOpcUa::BadDeadbandFilterInvalid 0x808E0000
QOpcUa::UncertainNoCommunicationLastUsableValue 0x408F0000
QOpcUa::UncertainLastUsableValue 0x40900000
QOpcUa::UncertainSubstituteValue 0x40910000
QOpcUa::UncertainInitialValue 0x40920000
QOpcUa::UncertainSensorNotAccurate 0x40930000
QOpcUa::UncertainEngineeringUnitsExceeded 0x40940000
QOpcUa::UncertainSubNormal 0x40950000
QOpcUa::GoodLocalOverride 0x00960000
QOpcUa::BadRefreshInProgress 0x80970000
QOpcUa::BadConditionAlreadyDisabled 0x80980000
QOpcUa::BadConditionAlreadyEnabled 0x80CC0000
QOpcUa::BadConditionDisabled 0x80990000
QOpcUa::BadEventIdUnknown 0x809A0000
QOpcUa::BadEventNotAcknowledgeable 0x80BB0000
QOpcUa::BadDialogNotActive 0x80CD0000
QOpcUa::BadDialogResponseInvalid 0x80CE0000
QOpcUa::BadConditionBranchAlreadyAcked 0x80CF0000
QOpcUa::BadConditionBranchAlreadyConfirmed 0x80D00000
QOpcUa::BadConditionAlreadyShelved 0x80D10000
QOpcUa::BadConditionNotShelved 0x80D20000
QOpcUa::BadShelvingTimeOutOfRange 0x80D30000
QOpcUa::BadNoData 0x809B0000
QOpcUa::BadBoundNotFound 0x80D70000
QOpcUa::BadBoundNotSupported 0x80D80000
QOpcUa::BadDataLost 0x809D0000
QOpcUa::BadDataUnavailable 0x809E0000
QOpcUa::BadEntryExists 0x809F0000
QOpcUa::BadNoEntryExists 0x80A00000
QOpcUa::BadTimestampNotSupported 0x80A10000
QOpcUa::GoodEntryInserted 0x00A20000
QOpcUa::GoodEntryReplaced 0x00A30000
QOpcUa::UncertainDataSubNormal 0x40A40000
QOpcUa::GoodNoData 0x00A50000
QOpcUa::GoodMoreData 0x00A60000
QOpcUa::BadAggregateListMismatch 0x80D40000
QOpcUa::BadAggregateNotSupported 0x80D50000
QOpcUa::BadAggregateInvalidInputs 0x80D60000
QOpcUa::BadAggregateConfigurationRejected 0x80DA0000
QOpcUa::GoodDataIgnored 0x00D90000
QOpcUa::BadRequestNotAllowed 0x80E40000
QOpcUa::GoodEdited 0x00DC0000
QOpcUa::GoodPostActionFailed 0x00DD0000
QOpcUa::UncertainDominantValueChanged 0x40DE0000
QOpcUa::GoodDependentValueChanged 0x00E00000
QOpcUa::BadDominantValueChanged 0x80E10000
QOpcUa::UncertainDependentValueChanged 0x40E20000
QOpcUa::BadDependentValueChanged 0x80E30000
QOpcUa::GoodCommunicationEvent 0x00A70000
QOpcUa::GoodShutdownEvent 0x00A80000
QOpcUa::GoodCallAgain 0x00A90000
QOpcUa::GoodNonCriticalTimeout 0x00AA0000
QOpcUa::BadInvalidArgument 0x80AB0000
QOpcUa::BadConnectionRejected 0x80AC0000
QOpcUa::BadDisconnect 0x80AD0000
QOpcUa::BadConnectionClosed 0x80AE0000
QOpcUa::BadInvalidState 0x80AF0000
QOpcUa::BadEndOfStream 0x80B00000
QOpcUa::BadNoDataAvailable 0x80B10000
QOpcUa::BadWaitingForResponse 0x80B20000
QOpcUa::BadOperationAbandoned 0x80B30000
QOpcUa::BadExpectedStreamToBlock 0x80B40000
QOpcUa::BadWouldBlock 0x80B50000
QOpcUa::BadSyntaxError 0x80B60000
QOpcUa::BadMaxConnectionsReached 0x80B70000

enum class QOpcUa::WriteMaskBit
flags QOpcUa::WriteMask

This enum contains all possible bits for the WriteMask and UserWriteMask node attributes defined in OPC-UA part 3, Table 3.

Constant Value Description
QOpcUa::WriteMaskBit::None 0 No attribute is writable.
QOpcUa::WriteMaskBit::AccessLevel (1 << 0) The AccessLevel attribute is writable.
QOpcUa::WriteMaskBit::ArrayDimensions (1 << 1) The ArrayDimensions attribute is writable.
QOpcUa::WriteMaskBit::BrowseName (1 << 2) The BrowseName attribute is writable.
QOpcUa::WriteMaskBit::ContainsNoLoops (1 << 3) The ContainsNoLoops attribute is writable.
QOpcUa::WriteMaskBit::DataType (1 << 4) The DataType attribute is writable.
QOpcUa::WriteMaskBit::Description (1 << 5) The Description attribute is writable.
QOpcUa::WriteMaskBit::DisplayName (1 << 6) The DisplayName attribute is writable.
QOpcUa::WriteMaskBit::EventNotifier (1 << 7) The EventNotifier attribute is writable.
QOpcUa::WriteMaskBit::Executable (1 << 8) The Executable attribute is writable.
QOpcUa::WriteMaskBit::Historizing (1 << 9) The Historizing attribute is writable.
QOpcUa::WriteMaskBit::InverseName (1 << 10) The InverseName attribute is writable.
QOpcUa::WriteMaskBit::IsAbstract (1 << 11) The IsAbstract attribute is writable.
QOpcUa::WriteMaskBit::MinimumSamplingInterval (1 << 12) The MinimumSamplingInterval attribute is writable.
QOpcUa::WriteMaskBit::NodeClass (1 << 13) The NodeClass attribute is writable.
QOpcUa::WriteMaskBit::NodeId (1 << 14) The NodeId attribute is writable.
QOpcUa::WriteMaskBit::Symmetric (1 << 15) The Symmetric attribute is writable.
QOpcUa::WriteMaskBit::UserAccessLevel (1 << 16) The UserAccessLevel attribute is writable.
QOpcUa::WriteMaskBit::UserExecutable (1 << 17) The UserExecutable attribute is writable.
QOpcUa::WriteMaskBit::UserWriteMask (1 << 18) The UserWriteMask attribute is writable.
QOpcUa::WriteMaskBit::ValueRank (1 << 19) The ValueRank attribute is writable.
QOpcUa::WriteMaskBit::WriteMask (1 << 20) The WriteMask attribute is writable.
QOpcUa::WriteMaskBit::ValueForVariableType (1 << 21) The Value attribute of a variable type is writable.

The WriteMask type is a typedef for QFlags<WriteMaskBit>. It stores an OR combination of WriteMaskBit values.

Function Documentation

QOpcUa::ErrorCategory QOpcUa::errorCategory(QOpcUa::UaStatusCode statusCode)

Converts statusCode to an ErrorCategory. ErrorCategory can be used in cases where the exact error is not important.

For error handling dependent on status codes, the full status code must be used instead. The meaning of the status codes for the different services is documented in OPC-UA part 4.

If statusCode has not been categorized, UnspecifiedError is returned. In this case, the user must check the full status code.

[since QtOpcUa 5.14] bool QOpcUa::isSecurePolicy(const QString &securityPolicy)

Returns true if securityPolicy is a secure policy, false otherwise.

This function was introduced in QtOpcUa 5.14.

bool QOpcUa::isSuccessStatus(QOpcUa::UaStatusCode statusCode)

This method can be used to check if a call has successfully finished.

Returns true if statusCode's severity field is Good.

[since 5.13] QOpcUa::Types QOpcUa::metaTypeToQOpcUaType(QMetaType::Type type)

Returns the Qt OPC UA type from type. In case the type does not map, QOpcUa::Undefined is returned.

This function was introduced in Qt 5.13.

QString QOpcUa::namespace0Id(QOpcUa::NodeIds::Namespace0 id)

Returns a node id string for the namespace 0 identifier id.

QOpcUa::NodeIds::Namespace0 QOpcUa::namespace0IdFromNodeId(const QString &nodeId)

Returns the enum value from QOpcUa::NodeIds::Namespace0 for nodeId.

If the node id is not in namespace 0 or doesn't have a numeric identifier which is part of the OPC Foundation's NodeIds.csv file, Unknown is returned.

If Qt OPC UA has been configured with -no-feature-ns0idnames, the check if the numeric identifier is part of the NodeIds.csv file is omitted. If the node id is in namespace 0 and has a numeric identifier, the identifier is returned regardless if it is part of the QOpcUa::NodeIds::Namespace0 enum.

QString QOpcUa::namespace0IdName(QOpcUa::NodeIds::Namespace0 id)

Returns the name of the namespace 0 node id id.

If id is unknown or Qt OPC UA has been configured with -no-feature-ns0idnames, an empty string is returned.

bool QOpcUa::nodeIdEquals(const QString &first, const QString &second)

Returns true if the two node ids first and second have the same namespace index and identifier. A node id string without a namespace index is assumed to be in namespace 0.

QString QOpcUa::nodeIdFromByteString(quint16 ns, const QByteArray &identifier)

Creates a node id string from the namespace index ns and the byte string identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromGuid(quint16 ns, const QUuid &identifier)

Creates a node id string from the namespace index ns and the GUID identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromInteger(quint16 ns, quint32 identifier)

Creates a node id string from the namespace index ns and the integer identifier.

See also QOpcUaNode.

QString QOpcUa::nodeIdFromReferenceType(QOpcUa::ReferenceTypeId referenceType)

Creates a node id string for the reference type id referenceType.

QString QOpcUa::nodeIdFromString(quint16 ns, const QString &identifier)

Creates a node id string from the namespace index ns and the string identifier.

See also QOpcUaNode.

bool QOpcUa::nodeIdStringSplit(const QString &nodeIdString, quint16 *nsIndex, QString *identifier, char *identifierType)

Splits the node id string nodeIdString in its components. The namespace index of the node id will be copied into nsIndex. The identifier string is copied into identifier and the identifier type (i, s, g, b) is copied into identifierType.

Returns true if the node id could be split successfully.

For example, "ns=1;s=MyString" is split into 1, 's' and "MyString". If no namespace index is given, ns=0 is assumed.

size_t QOpcUa::qHash(const QOpcUa::NodeAttribute &attr)

Returns a QHash key for attr.

QString QOpcUa::statusToString(QOpcUa::UaStatusCode statusCode)

Returns a textual representation of statusCode.

Currently, this is the name of the enum value but may be a real message in future releases.

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