For the purposes of this document, the terms and definitions given in OPC 10000-1as well as the following apply.

instance of a DataType Nodethat is used together with the ValueRank Attributeto define the data type of a Variable

NodeIdof a DataType Node

Variablesthat represent valuesof Objects, either directly or indirectly for complex Variables, where the Variablesare always the TargetNodeof a HasComponent Reference

ObjectType Nodethat represents the type definition of an Event

Referencethat is used to construct hierarchies in the AddressSpace

Note 1to entry: All hierarchical ReferenceTypes are derived from HierarchicalReferences.

Nodethat is used by a complex TypeDefinitionNodeto expose its complex structure

Note 1 to entry: It is an instance used by a type definition.

metadata of an InstanceDeclarationthat defines how the InstanceDeclarationwill be used for instantiation and also defines subtyping rules for an InstanceDeclaration

Variablesthat are the TargetNodefor a HasProperty Reference

Note 1 to entry:Propertiesdescribe the characteristics of a Node.

Nodehaving a Referenceto another Node

EXAMPLE: In the Reference“A contains B”, “A” is the SourceNode.

Nodethat is referenced by another Node

EXAMPLE: In the Reference“A Contains B”, “B” is the TargetNode.

Nodethat is used to define the type of another Node

Note 1 to entry: ObjectTypeand VariableType Nodesare TypeDefinitionNodes.

Nodethat represents the type definition for a Variable