opcua:Property
Mapped https://mapped.com/schema/mapped/1.0/opcua#Property
An OPC UA Property (OPC 10000-3 §5.6.3): a Variable that describes its parent, reached through HasProperty, typed PropertyType, and always a leaf. opcua:browseName names it and opcua:value holds its value. Standard Data Access Properties (EngineeringUnits, EURange, …) are fields of their opcua:Variable instead. Not a subclass of opcua:Variable: a Property has no components, and opcua:Variable is kept for DataVariables, the ones that become Points.
Hierarchy
Parent classes: opcua:Node
Subclasses: none, this is a leaf class.
Facts
| Fact | Value |
|---|---|
| URI | https://mapped.com/schema/mapped/1.0/opcua#Property |
| Source | Mapped |
| Protobuf | OPCUA_PROPERTY |
| GraphQL | OPCUAProperty |
| Deprecated | No |
Properties
| Property | Type | Required | Default | Description |
|---|---|---|---|---|
opcua:arrayDimensions | string | The maximum length of each dimension of an array value, in the opcua.array_dimensions JSON shape: the ArrayDimensions attribute of a Variable or Property (OPC 10000-3 §5.6.2), or StructureField.ArrayDimensions of an opcua:Field (§8.51). One entry per dimension, in order; 0 means the maximum is unknown. Written only when the value is an array. | ||
opcua:value | string | The value of an opcua:Property (OPC 10000-3 §5.6.3) as browsed, in OPC UA's JSON encoding (OPC 10000-6 §5.4, verbose form) with Mapped's deviations: a LocalizedText is its text, Int64 a bounded number, an enumeration its number, an OptionSet an opcua.option_set, a value more specific than its DataType tagged with UaTypeId. Structure keys are exact field names. An undecodable value is kept as {UaTypeId, UaEncodingId, UaEncoding, UaBody}; opcua:statusCode says why. | ||
opcua:valueRank | integer | The ValueRank of a Variable or Property (OPC 10000-3 §5.6.2): n > 0 for an array of exactly n dimensions, 0 for one or more dimensions, -1 for a scalar, -2 for a scalar or an array of any rank, -3 for a scalar or one dimension. On an opcua:Field it is StructureField.ValueRank (§8.51), only -1 or n > 0. An array rarely maps to a single Point. |
exactType is always opcua:Property.
Inherited properties (18)
| Property | Type | Required | Default | Description |
|---|---|---|---|---|
connectedDataSourceId | string | The id of the origin data source of an entity. This id is already a part of mappingKey but important for faster query. | ||
connectorIds | Array<string> | The ids of the connectors associated with the entity. | ||
dateCreated | dateTime | Datetime when it is created. | ||
dateUpdated | dateTime | Datetime when it is updated last time. | ||
description | string | |||
enrichmentSourceConnectorId | string | The id of the source connector with which the vertex, whether it's a property bag or a derived entity, is associated. | ||
id | string | Yes | A globally unique ID in Mapped services. | |
isVirtual | boolean | false | If this is true, the corresponding entity is virtual, meaning it doesn't exist in the real world but fabricated in the Mapped's system. | |
mappingKey | string | The origin of the entity. More detailed definition is available at here. | ||
name | string | |||
opcua:browseName | string | The name part of the node's BrowseName (OPC 10000-3 §5.2.4), a QualifiedName; the namespace part is opcua:browseNameNamespaceUri. The DisplayName and Description attributes are stored as mapped:name and mapped:description. | ||
opcua:browseNameNamespaceUri | string | The namespace of the node's BrowseName (OPC 10000-3 §8.3) as a URI: its NamespaceIndex resolved through the server's NamespaceArray, http://opcfoundation.org/UA/ for namespace 0. Not the NodeId's namespace: a child that a type declares has its type's namespace. It tells a companion-spec name, such as the DI SerialNumber, from a vendor's. | ||
opcua:nodeId | string | Yes | The node's NodeId (OPC 10000-3 §5.2.2) in the string form of OPC 10000-6 §5.1.12: nsu=<namespace URI>;<identifier> for every namespace except 0, and the bare <identifier> (such as i=58) for namespace 0. GUID identifiers are uppercase. It is the deduplication key for OPC UA nodes, so a node must always produce the same string. | |
opcua:statusCode | string | The OPC UA StatusCode (OPC 10000-4 §7.38), as its symbolic name such as BadNotReadable, of the connector's read of this node's data, written only when it isn't Good. On an opcua:Property it explains the value: a failed read leaves opcua:value out, and a value that can't be decoded is kept undecoded. On a type vertex it says why the type couldn't be read, leaving a placeholder with only opcua:nodeId. | ||
organizationId | string | Yes | The id of the organization that owns the entity. | |
seeAlso | string | |||
systemType | Array<Object> | A system type of the system the entity is associated. | ||
type | Array<Object> | Yes | The entity's types or classes. The types are determined within the class hierarchy. This is an stringified alias for rdf:type. |
Relationships
| Relationship | Targets | Inverse | Cardinality | Notes |
|---|---|---|---|---|
opcua:hasDataType | opcua:DataType | opcua:isDataTypeOf | 0..1 | transitive, canonical From a Variable, Property or opcua:Field to the opcua:DataType of what it holds: the DataType attribute (OPC 10000-3 §5.6.2) of a Variable or Property, or StructureField.DataType (§8.51) of a field. OPC UA has no such reference: each holds the DataType's NodeId, and the edge resolves it to the DataType's vertex. |
opcua:isPropertyOf | opcua:Object, opcua:Variable | opcua:hasProperty | 0..* | The Object or Variable this Property describes: the inverse of opcua:hasProperty. OPC UA names it PropertyOf (OPC 10000-5 §11.9). |
Inherited relationships (11)
| Relationship | Targets | Inverse | Cardinality | Notes |
|---|---|---|---|---|
contributesProperty | Meta | hasPropertyContributedFrom | 0..* | transitive, canonical Mapped's internal relationship indicating that a vertex is contributing a property/value to another vertex. |
hasExtendedProperty | ExtendedProperty | 0..* | transitive, canonical The entity's customer-defined extended properties, one node per key-value pair. | |
hasGeneratedArtifact | OpenUSD_Layer | isGeneratedFrom | 0..* | The layers generated from this source. |
hasIdentity | Identity | 0..* | transitive, canonical | |
hasPrimBinding | OpenUSD_Prim_Binding | isPrimBindingOf | 0..* | transitive, canonical Attaches a prim address. Used directly on an entity for pure addressing that carries no physical claim, and on a Representation or level-of-detail heuristic to realise it in USD. |
hasPropertyBag | PropertyBag | 0..* | transitive, canonical | |
isConstraintTarget | Spatial_Constraint | constrainsAgainst | 0..* | The constraints evaluated against this representation or entity. |
isMigratedFrom | Entity | isMigratedTo | 0..* | The entity this entity has been migrated from. This entity supersedes the source. |
isMigratedTo | Entity | isMigratedFrom | 0..* | transitive, canonical The entity this entity has been migrated to. The target supersedes this entity. |
isSubjectOfConstraint | Spatial_Constraint | constrainsSubject | 0..* | The constraints this entity is the subject of. |
opcua:organizedBy | opcua:Object, opcua:Server | opcua:organizes | 0..* | The Object or server that groups this node: the inverse of opcua:organizes, OPC UA's OrganizedBy (OPC 10000-5 §11.6). |
Referenced by
Classes whose own relationships point at opcua:Property.
- opcua:hasProperty (2): opcua:Object, opcua:Variable
- opcua:isDataTypeOf (1): opcua:DataType
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