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• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  4.3 Design goals
  runtime and properly utilize the data. OPC UA adds support for many relationships between Nodes instead of being limited to just a single hierarchy. In this way, a Server
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.3.4.2 AddressSpace organization
  meta model "building blocks" used to create an AddressSpace out of interconnected Nodes in a consistent manner. Servers are free to organize their Node s within the AddressSpace ... network of Node s, or any possible mix. OPC 10000-5 defines OPC UA Nodes and References and their expected organization in the AddressSpace . Some Profiles will not require that
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  5.7.7 Alias Names
  Name or Description attribute for that Node , but short of browsing all Nodes in all Servers , there is no easy way to find a Node with a particular Name
• OPC-10000-1 – OPC Unified Architecture - Part 1: Overview and Concepts
  6.7 Attribute Service Set
  used to read and write Attribute values. Attributes are primitive characteristics of Nodes that are defined by OPC UA. They may not be defined by Clients or Servers . Attributes
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  4.12 Roles
  Roles and AccessRestrictions is application specific, but they can be assigned to all Nodes in a Namespace or to specific Nodes . Figure 6 - Role overview OPC UA defines
• OPC-10000-2 – OPC Unified Architecture - Part 2: Security Model
  6.18 Zero trust environments
  zero trust environment. The capability to assign permissions down to individual Nodes , the ability to provide both application level and user level authentication, and support for central management of Authorization
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  3.1.17 TypeDefinitionNode
  define the type of another Node Note 1 to entry: ObjectType and VariableType Nodes are TypeDefinitionNodes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  3.3.1 Conventions for AddressSpace figures
  Conventions for AddressSpace figures Nodes and their References to each other are illustrated using figures. Figure 1 illustrates the conventions used in these figures. Figure 1 - AddressSpace Node diagrams ... these figures, rectangles represent Nodes . Node rectangles may be titled with one or two lines of text. When two lines are used, the first text line in the rectangle identifies
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  3.3.2 Conventions for defining NodeClasses
  defines Properties , but Properties can be defined by other standard organizations or vendors and Nodes can have Properties that are not standardised. Properties defined in this standard are defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.3 Object Model
  Object Model The elements of this model are represented in the AddressSpace as Nodes . Each Node is assigned to a NodeClass and each NodeClass represents a different element
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.4.1 General
  Objects and their components are represented in the AddressSpace as a set of Nodes described by Attributes and interconnected by References . Figure 3 illustrates the model of a Node
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.4.2 NodeClasses
  instance of one of these NodeClasses . No other NodeClasses shall be used to define Nodes , and as a result, Clients and Servers are not allowed to define NodeClasses or extend
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.4.3 Attributes
  Attributes Attributes are data elements that describe Nodes . Clients can access Attribute values using Read, Write, Query, and Subscription/MonitoredItem Services . These Services are defined in OPC 10000-4 . Attributes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.4.4 References
  References References are used to relate Nodes to each other. They can be accessed using the browsing and querying Services defined in OPC 10000-4 . Like Attributes , they are defined ... fundamental components of Nodes . Unlike Attributes , References are defined as instances of ReferenceType Nodes . ReferenceType Nodes are visible in the AddressSpace and are defined using the ReferenceType NodeClass
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.5.2 Properties
  Properties Properties are Server -defined characteristics of Objects , DataVariables and other Nodes . Properties differ from Attributes in that they characterise what the Node represents, such as a device ... purchase order. Attributes define additional metadata that is instantiated for all Nodes from a NodeClass . Attributes are common to all Nodes of a NodeClass and only defined by this specification
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.6.2 Complex TypeDefinitionNodes and their InstanceDeclarations
  their InstanceDeclarations TypeDefinitionNodes can be complex. A complex TypeDefinitionNode also defines References to other Nodes as part of the type definition. The ModellingRules defined in 6.4.4 specify how those Nodes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.6.4 Instantiation of complex TypeDefinitionNodes
  TYPE" can use this knowledge to directly browse to the containing Nodes for each instance of this type. This allows programming against the TypeDefinitionNode . For example, a graphical element ... programming against the TypeDefinitionNode . A TypeDefinitionNode or an InstanceDeclaration shall never reference two Nodes having the same BrowseName using forward hierarchical References . Instances based on InstanceDeclarations shall always keep
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.7.1 General
  Views can be used to subscribe to Events . The EventNotifier Attribute of those Nodes identifies if the Node allows subscribing to Events . Clients subscribe to such Nodes to receive Notifications ... some reason (i.e. the system is offline). Events may also be exposed through other Nodes anywhere in the AddressSpace . These Nodes (identified via the EventNotifier Attribute ) provide some subset
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.9.1 Overview
  manage user identities and credentials while the Server only manages the Permissions on its Nodes assigned to Roles . The set of Roles supported by a Server are published as components
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.9.2 Well Known Roles
  Suggested Permissions Anonymous The Role is allowed to browse and read non-security related Nodes only in the Server Object and all type Nodes . AuthenticatedUser The Role is allowed ... browse and read non-security related Nodes . TrustedApplication The Role is allowed to browse and read non-security related Nodes . Observer The Role is allowed to browse, read live data
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.9.3 Evaluating Permissions with Roles
  when they connect via a specific Endpoint. The examples also make use of the Nodes defined in Table 4 . The table specifies the value of the RolePermissions Attribute for each ... Node . Table 4 - Example Nodes Node Role Permissions Unit1.Measurement AuthenticatedUser = Browse Operator1 = Browse, Read Unit2.Measurement AuthenticatedUser = Browse Operator2 = Browse, Read SetPoint AuthenticatedUser = Browse Operator1 and Operator2 = Browse, Read, Write Supervisor
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  4.10.2 Interface Model
  consequence, an ObjectType cannot reference two Interfaces using the same BrowsePath for Nodes that are not similar Nodes or have TypeDefinitionNodes that are not compatible (compatible means they have either ... TypeDefinitionNode of the Object (e.g. all Mandatory InstanceDeclarations need to be applied). The Nodes defined based on the Interface shall be handled as if they were defined by the TypeDefinitionNode
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.1 Overview
  Overview Clause 5 defines the NodeClasses used to define Nodes in the OPC UA AddressSpace . NodeClasses are derived from a common Base NodeClass . This NodeClass is defined first, followed
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.2.2 NodeId
  NodeId Nodes are unambiguously identified using a constructed identifier called the NodeId . Some Servers may accept alternative NodeIds in addition to the canonical NodeId represented in this Attribute . A Server
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.2.4 BrowseName
  BrowseName Nodes have a BrowseName Attribute that is used as a non-localised human-readable name when browsing the AddressSpace to create paths out of BrowseNames . The TranslateBrowsePathsToNodeIds Service defined ... purpose. Unlike NodeIds , the BrowseName cannot be used to unambiguously identify a Node . Different Nodes may have the same BrowseName . Subclause 8.3 defines the structure of the BrowseName . It contains
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.3.2 Attributes
  affect an ObjectType . The restriction that a ReferenceType can only be used by relating Nodes of some NodeClasses with a defined cardinality is a special constraint of a ReferenceType
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.3.3.2 HasProperty References
  used to identify the Properties of a ReferenceType and shall only refer to Nodes of the Variable NodeClass . The Property NodeVersion is used to indicate the version of the ReferenceType
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.4 View NodeClass
  data. They do not need, or want, to be burdened with viewing Nodes in the AddressSpace for which they have no interest. To address this problem, this standard defines ... concept of a View . Each View defines a subset of the Nodes in the AddressSpace . The entire AddressSpace is the default View . Each Node in a View may contain only
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.5.1 Object NodeClass
  Object . Objects may use any additional References to define relationships to other Nodes . No restrictions are placed on the types of References used or on the NodeClasses of the Nodes ... Clause 7 . If the Object is used as an InstanceDeclaration (see 4.6 ) then all Nodes referenced with forward hierarchical References direction shall have unique BrowseNames in the context of this
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.5.2 ObjectType NodeClass
  DataVariables , the Methods , and Objects contained in the ObjectType . If and how the referenced Nodes are instantiated when an Object of this type is instantiated, is specified in 6.4 . HasProperty ... ObjectType . ObjectTypes may use any additional References to define relationships to other Nodes . No restrictions are placed on the types of References used or on the NodeClasses of the Nodes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.6.2 Variable NodeClass
  specified in 5.6.5 . Variables are always defined as Properties or DataVariables of other Nodes in the AddressSpace . They are never defined by themselves. A Variable is always part ... least one other Node , but may be related to any number of other Nodes . Variables are defined using the Variable NodeClass , specified in Table 13 . Table 13 - Variable NodeClass Name
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.6.3 Properties
  Properties Properties are used to define the characteristics of Nodes . Properties are defined using the Variable NodeClass , specified in Table 13 . However, they restrict their use. Properties are the leaf
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.6.4 DataVariable
  automated systems. DataVariables may use additional References to define relationships to other Nodes . No restrictions are placed on the types of References used or on the NodeClasses of the Nodes ... definition of the DataVariable . If the DataVariable is used as InstanceDeclaration (see 4.6 ) all Nodes referenced with forward hierarchical References shall have unique BrowseNames in the context of this DataVariable
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.6.5 VariableType NodeClass
  HasProperty References are used to identify the Properties of the VariableType . The referenced Nodes may be instantiated by the instances of this type, depending on the ModellingRules defined ... identify their containing DataVariables . Complex VariableTypes can only be used for DataVariables . The referenced Nodes may be instantiated by the instances of this type, depending on the ModellingRules defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.7.1 Method NodeClass
  Reference by the Method . Methods may use additional References to define relationships to other Nodes . No restrictions are placed on the types of References used or on the NodeClasses ... Nodes that may be referenced. However, restrictions may be defined by the ReferenceType excluding its use for Methods . Standard ReferenceTypes are described in Clause 7 . A Method shall always
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.8.1 DataType Model
  Server . Therefore, Servers may use well-known DataTypeIds without representing the corresponding DataType Nodes in their AddressSpaces . In other cases, DataTypes and their corresponding DataTypeIds may be vendor-defined. Servers ... should attempt to expose the DataType Nodes and the information about the structure of those DataTypes for Clients to read, although this information might not always be available
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  5.8.3 DataType NodeClass
  shall belong to one DataType , that is, it is not permitted for two DataType Nodes to point to the same DataTypeEncoding Object using HasEncoding References . The DataTypeEncoding Node shall provide ... Reference . The DataTypeEncoding of an abstract DataType is provided by its concrete subtypes. DataType Nodes shall not be the SourceNode of other types of References . However, they
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.2.5 BrowsePath
  BrowsePath A BrowsePath is a sequence of BrowseNames used to describe a path between Nodes related w ith a Reference
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.3.1 Overview
  Overview The HasSubtype ReferenceType defines subtypes of types. Subtyping can only occur between Nodes of the same NodeClass . Rules for subtyping ReferenceTypes are described in 5.3.3.3 . There is no common
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.3.3.1 Overview
  subtype. InstanceDeclarations can be overridden by adding References , changing References to reference different Nodes , changing References to be subtypes of the original ReferenceType , changing values of the Attributes or adding
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.3.3.2 Fully-inherited InstanceDeclarationHierarchy
  Figure 25 - Subtyping TypeDefinitionNodes An InstanceDeclarationHierarchy can be fully described as a table of Nodes identified by their BrowsePaths with a corresponding table of References . The InstanceDeclarationHierarchy for "BetaType ... Table 19 where the top half of the table is the table of Nodes and the bottom half is the table of References (the HasModellingRule references have been omitted from
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.3.3.3 Overriding InstanceDeclarations
  second step. A Reference is replaced if it goes between two overridden Nodes and has the same ReferenceType as a Reference defined in the supertype. The Reference specified ... semantics of certain TypeDefinitionNodes and ReferenceTypes may impose additional restrictions with regard to overriding Nodes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.1 Overview
  Objects , the same TypeDefinitionNode or a subtype of it. Instances may reference several Nodes with the same BrowsePath . Clients that need to distinguish between the Nodes based on the InstanceDeclarationHierarchy ... Nodes that are not based on the InstanceDeclarationHierarchy can accomplish this using the TranslateBrowsePathsToNodeIds service defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.2 Creating an Instance
  InstanceDeclaration . Figure 27 provides a simple example of a TypeDefinitionNode and an Instance . Nodes referenced by the TypeDefinitionNode without a ModellingRule do not appear in the instance. Instances may have ... Server will not define the entire instance and will provide remote references to Nodes in another Server . The ModellingRules described in 6.4.4.4 allow Servers to indicate that some Nodes
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.3 Constraints on an Instance
  some Attributes as defined in 6.2.7 . Additional References may be added to the Nodes , and References may be deleted as long as the ModellingRules defined on the InstanceDeclarations ... have been connected directly with several References , all those References shall connect the same Nodes . An example is given in Figure 28 . The instances A1 and A2 are allowed since
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.4.3 Instantiation Rules for Properties of ModellingRules
  InstanceDeclarations. The ModellingRules may be updated; the allowed changes to the ModellingRules of these Nodes are the same as those defined for subtyping in 6.4.4.2 . In Figure 30 an example
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  6.4.4.4.2 Optional
  instance, this can be the same Node or two different Nodes with the same BrowseName (similar Node to InstanceDeclaration F). Not considered in the example is if the instances have
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.2 References ReferenceType
  abstract ReferenceType ; only concrete subtypes of it shall be used as a Reference between Nodes in an OPC UA AddressSpace . There is no semantic associated with this ReferenceType . This
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.3 HierarchicalReferences ReferenceType
  HierarchicalReferences span a hierarchy. It means that it may be useful to present Nodes related with References of this type in a hierarchical-like way. HierarchicalReferences does not forbid loops
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.11 Organizes ReferenceType
  subtype of HierarchicalReferences . The semantic of this ReferenceType is to organise Nodes in the AddressSpace . It can be used to span multiple hierarchies independent of any hierarchy created with
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.17 HasEventSource
  Server to generate an Event from its source (causing the Event ) to its notifying Nodes . In particular, the root notifier of a Server , the Server Object defined
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  7.18 HasNotifier
  subtype of HasEventSource . The semantic of this ReferenceType is to relate Object Nodes that are notifiers with other notifier Object Nodes . The ReferenceType is used to establish a hierarchical organization
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.2.2 NamespaceIndex
  local Server , the underlying system, standards bodies and consortia. It is expected that most Nodes will use the URI of the Server or of the underlying system. Using a namespace
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.2.3 IdType
  across systems (e.g. GUIDs). System-wide and globally-unique identifiers allow Clients to track Nodes , such as work orders, as they move between OPC UA Servers as they progress through
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.40 OptionSet
  consider a valid bit and shall not apply any bit changes. The DataType Nodes representing concrete subtypes of the OptionSet shall have an OptionSetValues Property defined in Table ... changing it to "Motor is on" is not allowed. The DataType Nodes representing concrete or abstract subtypes of the OptionSet may have an OptionSetLength Property defined in Table
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  8.55 PermissionType
  Node identified by the SourceNode field. This Permission is only valid for EventType Nodes or SourceNodes . Call 12 The Client is allowed to call the Method if this ... Permission is valid for all NodeClasses . AddNode 16 The Client is allowed to add Nodes to the Namespace . This Permission is only used in the DefaultRolePermissions and DefaultUserRolePermissions Properties
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.32.2 NodeVersion Property
  NodeVersion Property There is a correlation between ModelChangeEvents and the NodeVersion Property of Nodes . Every time a ModelChangeEvent is issued for a Node , its NodeVersion shall be changed, and every ... never only one of the two mechanisms. This relation also implies that only those Nodes of the AddressSpace having a NodeVersion shall trigger a ModelChangeEvent . Other Nodes shall not trigger
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.32.3 Views
  whole AddressSpace is considered. Therefore the only Notifiers which report the ModelChangeEvents are View Nodes and the Server Object representing the default View . Each action generating a ModelChangeEvent may lead
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.32.5 BaseModelChangeEventType
  that changes occurred. Therefore the Client shall assume that any or all of the Nodes may have changed
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  9.32.7 Guidelines for ModelChangeEvents
  contain any information about the changes and the GeneralModelChangeEvent that identifies the changed Nodes via an array. The precision used depends on both the capability of the OPC UA Server
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  A.7 Defining ReferenceTypes
  hierarchical ReferenceTypes to expose different hierarchies, and new Nonhierarchical ReferenceTypes to expose relationships between Nodes in the AddressSpace
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  B.1 Background
  Foundation specifies not only the OPC UA Meta Model, but also defines some Nodes to organise the AddressSpace and to provide information about the Server as specified
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  C.1 General
  data. The graphical notation is able to expose all structural data of OPC UA. Nodes , their Attributes including their current value and References between the Nodes including the ReferenceType
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  C.2.2 Simple notation
  C.2.2 Simple notation Depending on their NodeClass Nodes are represented by different graphical forms as defined in Table C.1 . Table C.1 - Notation of Nodes depending on the NodeClass NodeClass Graphical ... font shall not be set to italic. References are represented as lines between Nodes as exemplified in Figure C.1 . Those lines can vary in their form. They do not have
• OPC-10000-3 – OPC Unified Architecture - Part 3: Address Space Model
  C.2.3 Extended notation
  shortcut in both notation variants. A figure can contain HasTypeDefinition References for some Nodes and the shortcut for other Nodes . It is not allowed that a Node uses the shortcut ... shown in Figure C.3 . Figure C.3 - Example of exposing Attributes To avoid too many Nodes in a figure it is allowed to expose Properties inside a Node , similar to Attributes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  4.1 Service Set model
  Figure 4 , defines Services that allow the Client to add, modify and delete Nodes in the AddressSpace . Figure 4 - NodeManagement Service Set The View Service Set , illustrated in Figure ... Figure 6 . It defines Services that allow Clients to read and write Attributes of Nodes , including their historical values. Since the value of a Variable is modelled as an Attribute
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.1 Overview
  Overview This Service Set defines Services to add and delete AddressSpace Nodes and References between them. All added Nodes continue to exist in the AddressSpace even if the Client that
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.1 Description
  Description This Service is used to add one or more Nodes into the AddressSpace hierarchy. Using this Service , each Node is added as the TargetNode of a HierarchicalReference to ensure ... beneath the new Object or Variable depending on the ModellingRule of each InstanceDeclaration . All Nodes with a ModellingRule of Mandatory shall be created or an existing Node shall be referenced
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.2.2 Parameters
  requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). nodesToAdd [] AddNodesItem List of Nodes to add. All Nodes are added as a Reference to an existing Node using ... response parameters (see 7.33 for ResponseHeader definition). results [] AddNodesResult List of results for the Nodes to add. The size and order of the list matches the size and order
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.3.1 Description
  This Service is used to add one or more References to one or more Nodes . The NodeClass is an input parameter that is used to validate that the Reference
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.1 Description
  Description This Service is used to delete one or more Nodes from the AddressSpace . When any of the Nodes deleted by an invocation of this Service is the TargetNode ... those References are left unresolved based on the deleteTargetReferences parameter. Servers may delete additional Nodes and References like child Nodes that exist based on a TypeDefinition . The behaviour is Server
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.8.4.2 Parameters
  Header Common request parameters (see 7.32 for RequestHeader definition). nodesToDelete [] DeleteNodes Item List of Nodes to delete. This structure is defined in-line with the following indented items. nodeId NodeId ... response parameters (see 7.33 for ResponseHeader definition). results [] StatusCode List of StatusCodes for the Nodes to delete (see 7.38 for StatusCode definition). The size and order of the list matches
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.9.5.1 Description
  these systems. The RegisterNodes Service can be used by Clients to register the Nodes that they know they will access repeatedly (e.g. Write, Call). It allows Servers ... improvements when using registered NodeIds , but the optimization measures are vendor-specific. For Variable Nodes Servers shall concentrate their optimization efforts on the Value Attribute . Registered NodeIds are only guaranteed
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.1 Overview
  Overview This Service Set provides Services to access Attributes that are part of Nodes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.1 Description
  This Service is used to read one or more Attributes of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array, this Service allows
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.2.2 Parameters
  Variable Value Attribute . The TimestampsToReturn enumeration is defined in 7.39 . nodesToRead [] ReadValueId List of Nodes and their Attributes to read. For each entry in this list, a StatusCode is returned
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.1 Description
  This Service is used to read historical values or Events of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array, this Service allows ... take longer than the Client timeout hint to read the data for all nodes to read. Then the Server may return zero results with a continuation point for the affected
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.3.2 Parameters
  NodeId If the HistoryReadDetails is RAW, PROCESSED, MODIFIED or ATTIME: The nodeId of the Nodes whose historical values are to be read. The value returned shall always include a timestamp ... timeout provided as hint by the Client is close to expiring and not all nodes have been processed. When this parameter is not used, its value is null or empty
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.1 Description
  used to write values to one or more Attributes of one or more Nodes . For constructed Attribute values whose elements are indexed, such as an array, this Service allows Clients
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.4.2 Parameters
  requestHeader RequestHeader Common request parameters (see 7.32 for RequestHeader definition). nodesToWrite [] WriteValue List of Nodes and their Attributes to write. This structure is defined in-line with the following indented ... response parameters (see 7.33 for ResponseHeader definition). results [] StatusCode List of results for the Nodes to write (see 7.38 for StatusCode definition). The size and order of the list matches
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.11.5.1 Description
  This Service is used to update historical values or Events of one or more Nodes . Several request parameters indicate how the Server is to update the historical value or Event
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.1.1 Overview
  Objects and views can be used to monitor Events . Events are only available from Nodes where the SubscribeToEvents bit of the EventNotifier Attribute is set. The filter defined in this
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  5.13.2.1 Description
  possible errors are allowed to be returned in the Publish response. Monitored Nodes can be removed from the AddressSpace after the creation of a MonitoredItem . This does not affect
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.2.1 Overview
  Service the Server is still responsible for managing and enforcing the Permissions assigned to Nodes in its Address Space . The clauses below discuss the use of an external Authorization Service
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.2 RedundantServerSet Requirements
  paths and structure of the AddressSpace identical logic for setting the ServiceLevel The only Nodes that can differ between Servers in a RedundantServerSet are the Nodes that ... local Server namespace like the Server diagnostic Nodes . A Client that fails over shall not be required to translate browse paths or otherwise resolve NodeIds . Servers are allowed
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  6.6.2.4.4 Server Failover modes
  Server can be active and fully operational. Mirroring state minimally includes Sessions , Subscriptions , registered Nodes , ContinuationPoints , sequence numbers, and sent Notifications . The ServiceLevel Variable defined in OPC 10000-5 should
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.7.4.5 SimpleAttributeOperand
  RelativePath are subtypes of HierarchicalReferences and the targets are Object or Variable Nodes and an Alias is not required . Table 129 defines the SimpleAttributeOperand type. Table 129 - SimpleAttributeOperand Name Type ... RelativePath that specifies forward references which are subtypes of the HierarchicalReferences ReferenceType . All Nodes followed by the browsePath shall be of the NodeClass Object or Variable . If this list
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.24.1 Overview
  Overview The AddNodes Service allows specifying the Attributes for the Nodes to add. The NodeAttributes is an extensible parameter whose structure depends on the type of the NodeClass being added
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.29 ReferenceDescription
  continuously monitor the remote Server for changes. The displayName shall be provided for remote Nodes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.30 RelativePath
  processed by finding the targets and then using those targets as the starting nodes for the next element. The targets of the final element are the target of the RelativePath ... applied to any starting Node . The targets of the RelativePath are the set of Nodes that are found by sequentially following the elements in RelativePath . A text format
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.39 TimestampsToReturn
  enumeration that specifies the Timestamp Attributes to be transmitted for MonitoredItems or Nodes in Read and HistoryRead . The values of this parameter are defined in Table 180 . Table 180 - TimestampsToReturn
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  7.44 ViewDescription
  parameter shall be null. viewVersion UInt32 The version number for the View desired. When Nodes are added to or removed from a View , the value of a View's ViewVersion
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  A.2 BNF of RelativePath
  RelativePath A RelativePath is a structure that describes a sequence of References and Nodes to follow. This annex describes a text format for a RelativePath that can be used ... final BrowseName from a path is equivalent to a wildcard operation that matches all Nodes which are the target of the Reference specified by the path. & The & sign
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.2.3 QueryFirst
  originating TypeDefinitionNode . Using these paths, the Client selects a set of Attributes from Nodes that are related to instances of the originating TypeDefinitionNode . Additionally, the Client can request the Server ... instance Node of the type defined by the type definition Node . The instance Nodes are further limited by the filter provided as part of this call. For a definition
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.2 Used type model
  named Reference . For Properties , the BrowseName , NodeId , and Value are shown. The Nodes that are included in a View (View1) are enclosed in the coloured box. Two Area nodes ... included for grouping of the existing person nodes. All custom nodes are defined in namespace 12 which is not included in Figure B.4 . Figure B.4 - Example Instance Nodes
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.5 Example 2
  B.3.5 Example 2 The second example illustrates receiving a list of disjoint Nodes and also illustrates that an array of results can be received. Example 2: Get PersonType.LastName, AnimalType.Name where
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.10 Example 7
  PersonType.NodeId, AnimalType.NodeId, PersonType.HasChild Reference, PersonType.HasAnimal Reference where the person is in Area2 (Cleveland nodes) and the person has a child. Table B.29 describes the NodeTypeDescription parameters used in the example ... NodeId of 95 where 95 is the NodeId associated with the Area2 node, all Nodes descend from BaseObjectType , and NodeId is a base Property so this filter will work
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.11 Example 8
  same as in the second example which illustrates receiving a list of disjoint Nodes and also illustrates that an array of results can be received. It is important to note ... result set from example 2, the only difference is the omission of the Cat Nodes . These Nodes are not in the View and thus are not included in the result
• OPC-10000-4 – OPC Unified Architecture - Part 4: Services
  B.3.12 Example 9
  This request is similar to the second example except that some of the requested nodes are expressed in terms of a relative path. It is important to note that ... B.37 . If this is compared to the result set from example 2, the Pet Nodes are included in the list, even though they are outside of the View . This
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  1 Scope
  Unified Architecture defines the Information Model .The Information Model describes standardised Nodes of a Server 's AddressSpace . These Nodes are standardised types as well as standardised instances used for diagnostics ... entry points to server-specific Nodes . Thus, the Information Model defines the AddressSpace of an empty OPC UA Server . However, it is not expected that all Servers will provide
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  3.3 Conventions for Node descriptions
  provided, the symbolic name of the Node representing the DataType shall be used. Nodes of all other NodeClasses cannot be defined in the same table; therefore only the used ReferenceType ... AddressSpace . If a Server supports a ConformanceUnit , it shall expose the Nodes related to the ConformanceUnit in its AddressSpace . If two Nodes are exposed, all References between the Nodes defined
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  4.1 NodeIds
  NodeIds The NodeIds of all Nodes described in this standard are only symbolic names. OPC 10000-6 defines the actual NodeIds . The symbolic name of each Node defined in this ... that the whole has a HasProperty or HasComponent Reference to its part. Since all Nodes not being part of another Node have a unique name in this standard, the symbolic
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  4.2 BrowseNames
  BrowseNames The text part of the BrowseNames for all Nodes defined in this standard is specified in the tables defining the Nodes . The NamespaceIndex for all BrowseNames defined in this
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  5.1 General
  General For all Nodes specified in NamespaceIndex 0, the Attributes named in Table 3 shall be set as specified in Table 3 . Table 3 - Common Node Attributes Attribute Value DisplayName
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  6.3.2 ServerCapabilitiesType
  shall not be included. When vendors expose their own capabilities, they should add additional Nodes to the standard ServerCapabilities Object instance. The < VendorCapability> Variable is used to provide
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  6.3.3 ServerDiagnosticsType
  diagnostics are turned off, the Server can return Bad_NodeIdUnknown for all static diagnostic Nodes except the EnabledFlag Property . Dynamic diagnostic Nodes (such as the Session Nodes ) will not appear
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  6.3.13 NamespaceMetadataType
  Property shall be set to a null DateTime . The IsNamespaceSubset Property defines whether all Nodes of the namespace are accessible in the Server or only a subset ... completeness is unknown then this Property shall be set to TRUE. Static Nodes are identical for all Attributes in all Servers , including the Value Attribute . For TypeDefinitionNodes , also the InstanceDeclarations
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  6.6 FolderType
  Instances of this ObjectType are used to organise the AddressSpace into a hierarchy of Nodes . They represent the root Node of a subtree, and have no other semantics associated with
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  8.1 General
  following subclauses can be extended by additional Properties or References to other Nodes , except where it is stated in the text that it is restricted
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  8.2.1 Overview
  Figure 1 - Standard AddressSpace structure The remainder of this provides descriptions of these standard Nodes and the organization of Nodes beneath them. Servers typically implement a subset of these standard ... Nodes , depending on their capabilities
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  8.2.4 Objects
  Objects This standard Object is the browse entry point for Object Nodes . Figure 3 illustrates the structure beneath this Node . Only Organizes References are used to relate Objects ... Objects and Variables and thus the " Objects " Object can also reference View Nodes using Organizes References . The intent of the " Objects " Object is that all Objects
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  8.2.5 Types
  Types This standard Object Node is the browse entry point for type Nodes . Figure 1 illustrates the structure beneath this Node . Only Organizes References are used to relate Objects
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  8.2.9 DataTypes
  entry point for DataTypes that the Server wishes to expose in the AddressSpace . DataType Nodes should be made available using Organizes References pointing either directly from the "DataTypes ... Object to the DataType Nodes or using additional Folder Objects for grouping purposes. The intent is that all DataTypes of the Server exposed in the AddressSpace are accessible following hierarchical
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  12.16 ModelChangeStructureDataType
  Node being the TargetNode . 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
• OPC-10000-5 – OPC Unified Architecture - Part 5: Information Model
  A.2 ServerType and Server Object
  provide one Server Object with a well-known NodeId . The NodeIds of the containing Nodes are also well-known because their symbolic name is specified in this standard
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  5.1.8 ExtensionObject
  Object is the identifier stored in the ExtensionObject . OPC 10000-3 describes how DataTypeEncoding Nodes are related to other Nodes of the AddressSpace . Elements of an array of ExtensionObjects
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  A.3 Numeric Node Ids
  BrowseName for the NamespaceArray Property of the standard Server Object is: Server_NamespaceArray . When Nodes do not have a parent that allows the creation of unique SymbolNames then ... convention is adopted. For example, DataTypeEncoding Nodes have the form: <DataTypeName>_Encoding_<BrowseName> The NamespaceUri for all NodeIds defined is http://opcfoundation.org/UA/ The CSV released
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  A.4 Media Types
  that conforms to the XML schema defined in Annex F . It contains set of Nodes
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.1 Overview
  also be used to serialize (i.e. import or export) an arbitrary set of Nodes in the Server Address Space . This serialized form can be used to save Server state ... Client). This schema only defines a way to represent the structure of Nodes . It is not intended to represent the numerous semantic rules which are defined in other parts
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.2 UANodeSet
  UANodeSet The UANodeSet is the root of the document. It defines a set of Nodes , their Attributes and References . References to Nodes outside of the document are allowed. The structure ... later of this specification. RolePermissions RolePermission [] The list of default RolePermissions for all Nodes in the model. AccessRestrictions AccessRestriction The default AccessRestrictions that apply to all Nodes in the model
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.3 UANode
  UANode A UANode is an abstract base type for all Nodes . It defines the base set of Attributes and the References . There are subtypes for each NodeClass defined ... authors of the UANodeSet and allow users of the UANodeSet to exclude Nodes based on a selection of ConformanceUnits . When an UAInstance has the ParentNodeId specified, the UAInstance inherits
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.7 UAInstance
  defined in OPC 10000-3 are described in detail below. Table F.6 - UANodeSet Instance Nodes Subtype Description UAObject Defines an Object Node as described in OPC 10000-3 . UAVariable Defines ... AddressSpace. For example, well-known Properties or Objects. Only UAObject and UAVariable Nodes may have DesignToolOnly is TRUE. If DesignToolOnly is TRUE, the ParentNodeId shall not be specified
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.9 UAMethod
  from the UAInstance type described in F.7 . MethodDeclarationId NodeId May be specified for Method Nodes that are a target of a HasComponent reference from a single Object Node
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.15 Example
  Example An example of the UANodeSet can be found below. This example defines the Nodes for an InformationModel with the URI of " http://sample.com/Instances ". This example references ... Nodes defined in the base OPC UA InformationModel and an InformationModel with the URI " http://sample.com/Types ". The XML namespaces declared at the top include the URIs
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.16 UANodeSetChanges
  UANodeSet or a UANodeSetChanges element at the root. It provides a list of Nodes / References to add and/or a list Nodes / References to delete. The UANodeSetChangesStatus structure defined in F.22 ... LastModified DateTime Same as described in Table F.1 . NodesToAdd NodesToAdd A list of new Nodes to add to the AddressSpace . ReferencesToAdd ReferencesToChange A list of new References
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.17 NodesToAdd
  F.17 NodesToAdd The NodesToAdd type specifies a list of Nodes to add to an AddressSpace . The structure of these Nodes is defined by the UANodeSet type in Table ... Type Description <choice> UAObject UAVariable UAMethod UAView UAObjectType UAVariableType UADataType UAReferenceType The Nodes to add to the AddressSpace . When adding Nodes , References can be specified as part
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.19 ReferenceToChange
  reference. Target NodeId The identifier for the target Node of the Reference . References to Nodes that could exist are always allowed. In other words, a Reference is never rejected simply
• OPC-10000-6 – OPC Unified Architecture - Part 6: Mappings
  F.20 NodesToDelete
  F.20 NodesToDelete The NodesToDelete type specifies a list of Nodes to remove from an AddressSpace . The elements of the type are defined in Table F.19 . Table F.19 - NodesToDelete Element Type
• OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access
  5.4 Address Space model
  Address Space model DataItems are always defined as data components of other Nodes in the AddressSpace . They are never defined by themselves. A simple example of a container for DataItems
• OPC-10000-8 – OPC Unified Architecture - Part 8: Data Access
  6.3.2 Using Dictionary References
  define the relationship to a Syntax Reference by referencing from quantity or unit Nodes to an instance of a SyntaxReferenceEntryType . Each quantity or unit instance can have zero
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  4.10 Condition instances in the AddressSpace
  monitor the current Condition state by subscribing to the Attribute values of Variable Nodes . It is possible that the value of a node may not always correspond with the value
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.5.3 Condition and branch instances
  Server . This Condition (and it representative ConditionId) follows the same rules associated with Nodes (and their representative NodeIds ) in the AddressSpace (see 10000-3 ). Therefore, once a Condition is created
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.8.24.3 SystemOffNormalAlarmType
  Clause 5.8.24.7 Subtype of the OffNormalAlarmType , i.e. it has HasProperty References to the same Nodes . ConformanceUnits A & C SystemOffNormal
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.11.2 RefreshStartEventType
  SystemEventType defined in 10000-5 , i.e. it has HasProperty References to the same Nodes . ConformanceUnits A & C Refresh A & C Refresh2
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.11.3 RefreshEndEventType
  SystemEventType defined in 10000-5 , i.e. it has HasProperty References to the same Nodes . ConformanceUnits A & C Refresh A & C Refresh2
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  5.11.4 RefreshRequiredEventType
  SystemEventType defined in 10000-5 , i.e. it has HasProperty References to the same Nodes . ConformanceUnits A & C Refresh A & C Refresh2 When a Server detects an Event queue
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  6.1 General
  this Clause allows Clients to detect Conditions and ConditionSources . An additional hierarchy of Object Nodes that are notifiers may be established to define one or more areas; the Client
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  6.3 Adding Conditions to the hierarchy
  types like the HasNotifier Reference ) and then browsing for HasCondition References from all target Nodes of the discovered References . Figure 27 shows the application of the HasCondition Reference
• OPC-10000-9 – OPC Unified Architecture - Part 9: Alarms & Conditions
  D.2.3 Event categories
  Category is also used to define subtypes of BaseConditionClassType . Figure D.1 illustrates how ObjectType Nodes created from the Event Categories and Condition Names are placed in the standard
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.1.2 Annotations Property
  also support Annotations on that HistoricalDataNode . See OPC 10000-4 for adding Properties to Nodes . A Server shall remove all Annotation data if it removes the Annotations Property from
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.6.2 HistoricalDataNodes Address Space Model
  HistoricalDataNodes Address Space Model HistoricalDataNodes are always a part of other Nodes in the AddressSpace. They are never defined by themselves. A simple example of a container for HistoricalDataNodes would
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.6.4 HistoricalEventNodes Address Space Model
  Space Model HistoricalEventNode Objects or Views in the AddressSpace that expose historical Events . These Nodes are identified via the EventNotifier Attribute , and provide some historical subset of the Events generated
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.7.2 HistoryServerCapabilitiesType
  Server . They do not guarantee that all capabilities will be available for all Nodes . For example, not all Nodes will support Events , or in the case of an aggregating Server
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.2 AuditHistoryEventUpdateEventType
  AuditHistoryUpdateEventType defined in OPC 10000-3 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable UpdatedNode NodeId PropertyType Mandatory HasProperty Variable PerformInsertReplace PerformUpdateType PropertyType Mandatory HasProperty Variable Filter
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.3 AuditHistoryValueUpdateEventType
  AuditHistoryUpdateEventType defined in OPC 10000-3 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable UpdatedNode NodeId PropertyType Mandatory HasProperty Variable PerformInsertReplace PerformUpdateType PropertyType Mandatory HasProperty Variable NewValues
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.4 AuditHistoryAnnotationUpdateEventType
  AuditHistoryUpdateEventType defined in OPC 10000-3 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable PerformInsertReplace PerformUpdateType PropertyType Mandatory HasProperty Variable NewValues Annotation[] PropertyType Mandatory HasProperty Variable OldValues
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.5 AuditHistoryDeleteEventType
  AuditHistoryUpdateEventType defined in OPC 10000-3 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable UpdatedNode NodeId PropertyType Mandatory HasSubtype ObjectType AuditHistoryRawModifyDeleteEventType HasSubtype ObjectType AuditHistoryAtTimeDeleteEventType HasSubtype ObjectType AuditHistoryEventDeleteEventType
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.6 AuditHistoryRawModifyDeleteEventType
  AuditHistoryDeleteEventType defined in Table 19 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable IsDeleteModified Boolean PropertyType Mandatory HasProperty Variable StartTime UtcTime PropertyType Mandatory HasProperty Variable EndTime UtcTime
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.7 AuditHistoryAtTimeDeleteEventType
  AuditHistoryDeleteEventType defined in Table 19 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable ReqTimes UtcTime[] PropertyType Mandatory HasProperty Variable OldValues DataValue[] PropertyType Mandatory ConformanceUnits Historical Access Audit
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.8 AuditHistoryEventDeleteEventType
  AuditHistoryDeleteEventType defined in Table 19 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable EventIds ByteString[] PropertyType Mandatory HasProperty Variable OldValues HistoryEventFieldList PropertyType Mandatory ConformanceUnits Historical Access Audit
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.9 AuditHistoryConfigurationChangeEventType
  AuditEventType defined in OPC 10000-5 , i.e. it has HasProperty References to the same Nodes . ConformanceUnits Historical Access Audit Configuration Change Events This EventType inherits all Properties of the AuditEventType
• OPC-10000-11 – OPC Unified Architecture - Part 11: Historical Access
  5.8.10 AuditHistoryBulkInsertEventType
  AuditEventType defined in OPC 10000-5 , i.e. it has HasProperty References to the same Nodes . HasProperty Variable UpdatedNode NodeId PropertyType Mandatory HasProperty Variable StartTime UtcTime PropertyType Mandatory HasProperty Variable EndTime
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  8.5.1 Overview
  AddressSpace used for PullManagement is shown in Figure 27 . Clients interact with the Nodes defined in this model when they request or revoke KeyCredentials for themselves or for another application
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  8.6.1 Overview
  AddressSpace used for PushManagement is shown in Figure 28 . Clients interact with the Nodes defined in this model when they update the KeyCredentials used by a Server to access resources
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  10.1 Namespace Metadata
  used to provide version information for the namespace and an indication about static Nodes . Static Nodes are identical for all Attributes in all Servers , including the Value Attribute
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  10.2 Handling of OPC UA Namespaces
  NodeId . Unlike NodeIds , the BrowseName cannot be used to unambiguously identify a Node . Different Nodes may have the same BrowseName . They are used to build a browse path between ... Nodes or to define a standard Property . Servers may often choose to use the same namespace for the NodeId and the BrowseName . However, if they want to provide a standard
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  A.2 Resolving References to Remote Servers
  Resolving References to Remote Servers The UA AddressSpace supports references between Nodes that exist in different Server AddressSpace spaces. These references are specified with a ExpandedNodeId that includes
• OPC-10000-12 – OPC Unified Architecture - Part 12: Discovery and Global Services
  B.2 Numeric Node Ids
  Numeric Node Ids This document defines Nodes which are part of the base OPC UA Specification. The numeric identifiers for these Nodes are part of the complete list of identifiers ... defined in OPC 10000-6 . In addition, this document defines Nodes which are only used by GlobalDiscoveryServers . The NamespaceUri for any GDS specific NodeIds is http://opcfoundation.org/UA/GDS
• OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub
  5.4.2.2 Message reception
  application-specific. For example, an additional dispatching step may map the received values to Nodes in the Subscribers OPC UA AddressSpace . The configuration for such a dispatching is called SubscribedDataSet
• OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub
  9.1.9.5 StandaloneSubscribedDataSetType
  DataSetReader . If a DataSetReader is connected, the DataSetReader Object shall share the Nodes SubscribedDataSet and DataSetMetaData with the StandaloneSubscribedDataSet Object . The relation between standalone SubscribedDataSet and the connected DataSetReader
• OPC-10000-14 – OPC Unified Architecture - Part 14: PubSub
  C.2 Client Server Subscriptions
  Server model In this model the Client is the active entity. It chooses what Nodes of the Server AddressSpace and what Services to use. Subscriptions are created or deleted
• OPC-10000-15 – OPC Unified Architecture - Part 15: Safety
  6.2.2.1 SafetyACSet Object
  shall be used. A description of the graphical notation for the different types of Nodes and References (shown in Figure 3 , Figure 4 , and Figure 6 ) can be found
• OPC-10000-16 – OPC Unified Architecture - Part 16: State Machines
  4.5.1 StateMachineType using inheritance
  CurrentState" representing the current State . The "MyStateMachine" Object only includes the Nodes which expose information specific to the instance
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  1 Scope
  NodeIds on a system wide basis. An aggregating Server could also define AliasNames for Nodes in other Servers that do not support AliasNames. A GDS may be constructed that would
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  6.2 AliasNameType ObjectType Definition
  AliasNameType ObjectType Definition Instances of the AliasNameType ObjectType provide alternate names for Nodes . The AliasNameType is formally defined in Table 1 . Table 1 - AliasNameType Definition Attribute Value BrowseName AliasNameType IsAbstract
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  6.3.1 Definition
  last time an AliasNameCategory was added or deleted, The last time the referenced Nodes of an AliasName in the AliasNameCategory changed. For AliasNameCategoryType instances that are nested, the value
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  6.3.2 FindAlias Method
  FindAlias Method The FindAlias Method allows a Client to obtain the list of Nodes that match the provided AliasName search string. The signature of this Method is specified below ... includes all subtypes of that ReferenceType. AliasNodeList The returned list of AliasNameDataType . If no Nodes match the search string or have the appropriate ReferenceType , the list shall be empty. Method
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  6.3.3 FindAliasVerbose Method
  includes all subtypes of that ReferenceType. AliasNodeList The returned list of AliasNameVerboseDataType . If no Nodes match the search string or have the appropriate ReferenceType , the list shall be empty. Method
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  6.3.4 AddAliasesToCategory Method
  AliasName is added to. TargetNodes An array of NodeIds that represents the target Nodes of the AliasNames to be added. Each element in this array corresponds to an element ... shall be the same as the size of the AliasNames parameter. The generated AliasName Nodes are assigned a Server specific NodeId . If the same AliasName is to reference multiple TargetNodes
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  7.2 AliasNameDataType
  Description AliasNameDataType Structure AliasName QualifiedName The AliasName ( BrowseName of the Node ). ReferencedNodes ExpandedNodeId[] The Nodes referenced by the AliasName . Its representation in the AddressSpace is defined in Table 18 . Table
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  7.3 AliasNameVerboseDataType
  Description AliasNameVerboseDataType Structure AliasName QualifiedName The AliasName ( BrowseName of the Node ). ReferencedNodes ExpandedNodeId[] The Nodes referenced by the AliasName . ServerUris String[] The ServerUri associated with each of the ExpandedNodeIds
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  8.2 AliasFor ReferenceType
  NonHierarchicalReferences . The semantic of this ReferenceType is to link AliasNameType instances to the Nodes they represent. The inverse reference is not required, i.e. the Nodes might not have a reference
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  A.3 AliasNames in an aggregating Server
  first example, with the exception that in the aggregating Server the target Nodes referenced by the AliasFor Reference could be in other Servers . Figure A.2 provides an illustration
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  A.4 Standalone AliasNames Server
  standalone AliasNames Server illustrated in Figure A.3 provides a list of AliasNames that reference Nodes in multiple separate Servers . This type of configuration could be used for Servers that ... standalone AliasNames Server to ensure that the mapping of AliasNames to actual Nodes is correct. Figure A.3 - AliasNames Server example
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  A.5 Client use of an AliasName Server
  Client must be prepared for this. The first Node in the list of referenced Nodes returned by the FindAlias Method is the Node that the Server feels is the best ... than one instance of AliasNameType and each could have their own list of referenced Nodes . If the Method call was on a GDS or aggregating Server , the Client reads
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  C.1 Overview
  Global Discovery Server (GDS) that supports AliasNames, provides AliasNames functionality, but the target Nodes referenced are in other Servers. The AliasName s are aggregated from the Servers that have registered
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  C.4 Disconnect between a Client and an AliasName Server
  Disconnect between a Client and an AliasName Server When a Client that uses aliased Nodes detects a communication problem with the Server , the Client can return
• OPC-10000-17 – OPC Unified Architecture - Part 17: Alias Names
  D.1.2 PubSub multicast messages
  list it has from the Server . There could be new AliasNameCategories , new AliasName Nodes , there could also be deleted AliasName Nodes or AliasNameCategories. For new AliasName Nodes , a Browse ... frame message would occur. The aggregating Server or GDS can remove all AliasName Nodes and AliasNameCategories associated with a Server if no messages of any form are received from
• OPC-10000-18 – OPC Unified Architecture - Part 18: Role-Based Security
  4.1 General
  identities and credentials while the Server only manages the Permissions for Roles on its Nodes . OPC 10000-3 defines the possible Permissions and the representation as Node Attributes . Figure
• OPC-10000-18 – OPC Unified Architecture - Part 18: Role-Based Security
  4.4.3 IdentityMappingRuleType
  example, the Role "subscriber" may only be allowed to access PubSub related Nodes . If the issuedTokenType of the Access Token is " http://opcfoundation.org/UA/UserToken#JWT" , the criteria contains
• OPC-10000-19 – OPC Unified Architecture - Part 19: Dictionary Reference
  8.1 Dictionaries Object
  expose the hierarchy of the referenced dictionaries or dictionary entries referenced by other Nodes . The Dictionaries Object is a component of the Server Object defined ... Dictionaries Object references DictionaryEntryType and DictionaryFolderType Object Nodes . It is formally defined in Table 8 . Table 8 - Dictionaries Definition Attribute Value BrowseName Dictionaries References NodeClass BrowseName DataType TypeDefinition ModellingRule ComponentOf
• OPC-10000-21 – OPC Unified Architecture - Part 21: Device Onboarding
  4.2.6 Roles and Privileges
  needed because not all restrictions can be expressed simply by granting Role permissions on Nodes . For example, authenticated Devices are granted the ability to update only their own information which
• OPC-10000-21 – OPC Unified Architecture - Part 21: Device Onboarding
  10.1 Namespace Metadata
  used to provide version information for the namespace and an indication about static Nodes . Static Nodes are identical for all Attributes in all Servers , including the Value Attribute
• OPC-10000-21 – OPC Unified Architecture - Part 21: Device Onboarding
  10.2 Handling of OPC UA Namespaces
  NodeId . Unlike NodeIds , the BrowseName cannot be used to unambiguously identify a Node . Different Nodes may have the same BrowseName . They are used to build a browse path between ... Nodes or to define a standard Property . Servers may often choose to use the same namespace for the NodeId and the BrowseName . However, if they want to provide a standard
• OPC-10000-21 – OPC Unified Architecture - Part 21: Device Onboarding
  A.1 Namespace and Identifiers for the Onboarding Information Model
  Namespace and Identifiers for the Onboarding Information Model This document defines Nodes which are part of the base OPC UA Specification. The numeric identifiers for these Nodes are part ... complete list of identifiers defined in OPC 10000-6 . In addition, this document defines Nodes which are only used by Registrars . The NamespaceUri for any Device Onboarding specific NodeIds
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.8.1 Overview
  Overview This ReferenceType can be used to expose that two different Nodes in the AddressSpace representing the same entity in the real world. Both Nodes might represent different aspects ... address, potentially in different data formats. If a Server exposes more than two Nodes representing the same entity, it is recommended that all of the Nodes reference each other
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.8.2 Definition
  same semantic in both directions. The semantic of this ReferenceType is to relate two Nodes that represent the same entity in the real world. The SourceNode of References of this
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.9.1 Overview
  Overview This ReferenceType can be used to expose that two different Nodes in the AddressSpace representing the same hardware. It refines the RepresentsSameEntityAs ReferenceType and defines that the same entity
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.9.2 Definition
  same semantic in both directions The semantic of this ReferenceType is to relate two Nodes that represent the same hardware. The SourceNode of References of this ReferenceType
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.10.1 Overview
  Overview This ReferenceType can be used to expose that two different Nodes in the AddressSpace representing the same functionality. It refines the RepresentsSameEntityAs ReferenceType and defines that the same entity
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  4.10.2 Definition
  same semantic in both directions. The semantic of this ReferenceType is to relate two Nodes that represent the same functionality. The SourceNode of References of this ReferenceType
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  5.1 Overview
  Overview OPC UA relates Nodes using References . This concept is intentionally a simple construct, where the only information of a Reference is the SourceNode , the TargetNode , the ReferenceType ... TargetNode of such a Reference . Potentially, it can also be referenced by other Nodes to provide additional information (see also 5.2 ). As Nodes can have several References , each ReferenceDescription Variable
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  5.2 Reference Refinement
  first refinement level. Both contain multiple hops in one refinement. In the example, the Nodes used in the refinement of "ConnectsTo1" do reference the ReferenceDescription Variable , whereas ... ReferenceRefinement intentionally only defines one refinement path (of potentially many possible paths between the Nodes ). If the path used changes, the ReferenceRefinement needs to change
• OPC-10000-23 – OPC Unified Architecture - Part 23: Common ReferenceTypes
  A.2 Alternative Approach: Intermediate Object
  example, to provide information about the physical cable connecting two devices represented as Nodes , another Node is added representing the cable, and both device Nodes are connected to the cable ... original target. Therefore, the ReferenceDescription uses an approach, where the Reference directly connects both Nodes without the need to deal with an intermediate Object . Figure A.1 - Refinement of References
• OPC-10000-24 – OPC Unified Architecture - Part 24: Scheduler
  7.1.2 ObjectType definition
  either a specific date or date pattern, or range of dates. The child Nodes of the CalendarType have additional Attribute values defined in Table 5 . Table 5 - CalendarType Attribute values ... child Nodes BrowsePath Description Attribute PresentValue Indicates if the current date is in the DateList (true) or not (false) DateList Array of elements each defining either a specific date
• OPC-10000-24 – OPC Unified Architecture - Part 24: Scheduler
  7.2.2 ObjectType definition
  shall be applied when starting the schedule Object (see 6.3 for details). The child Nodes of the ScheduleType have additional Attribute values defined in Table 11 . Table 11 - ScheduleType Attribute ... values for child Nodes BrowsePath Description Attribute ExceptionSchedule An array of special events. If present, each of those special events describes a sequence of schedule actions that take precedence over
• OPC-10000-24 – OPC Unified Architecture - Part 24: Scheduler
  10.1 Namespace Metadata
  used to provide version information for the namespace and an indication about static Nodes . Static Nodes are identical for all Attributes in all Servers , including the Value Attribute
• OPC-10000-24 – OPC Unified Architecture - Part 24: Scheduler
  10.2 Handling of OPC UA Namespaces
  NodeId . Unlike NodeIds , the BrowseName cannot be used to unambiguously identify a Node . Different Nodes may have the same BrowseName . They are used to build a browse path between ... Nodes or to define a standard Property . Servers may often choose to use the same namespace for the NodeId and the BrowseName . However, if they want to provide a standard
• OPC-10000-25 – OPC Unified Architecture - Part 25: Object Serialization
  3.1.3 SerializationScope
  SerializationScope the subset of Nodes directly or indirectly referenced by the SerializationStartNode , selected by the SerializationConfiguration
• OPC-10000-25 – OPC Unified Architecture - Part 25: Object Serialization
  3.1.5 SerializationValue
  SerializationValue the merged compact aggregation of the Values of all serialized Nodes belonging to the SerializationScope and is the Value of the SerializedData Variable