UA Part 23: Common Reference Types - 5.5 OPC UA DataTypes

This structure contains the description of a Reference. The structure is defined in Table 16.

Table 16 – ReferenceDescriptionDataType Structure

Name	Type	Description
ReferenceDescriptionDataType	structure
SourceNode	NodeId	The SourceNode of the Reference.
ReferenceType	NodeId	The ReferenceType of the Reference.
IsForward	Boolean	The direction of the Reference. If TRUE in forward direction, if FALSE in inverse direction. For symmetric References it shall always be set to TRUE.
TargetNode	ExpandedNodeId	The TargetNode of the Reference.

Table 17 – ReferenceDescriptionDataType Definition

Attribute		Value
BrowseName		ReferenceDescriptionDataType
IsAbstract		FALSE
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of Structure defined in OPC 10000-5
Conformance Units
Base Info ReferenceDescription

This structure contains the description of a Reference without SourceNode. It can be used to list a path of References without repeating the SourceNode, like in the ReferenceRefinement Property in 5.3.1. The structure is defined in Table 18.

Table 18 – ReferenceListEntryDataType Structure

Name	Type	Description
ReferenceListEntryDataType	structure
ReferenceType	NodeId	The Node Id of the ReferenceType used as Reference.
IsForward	Boolean	The direction of the Reference, if TRUE in forward direction, if FALSE, in inverse direction. For symmetric references it shall always be set to TRUE.
TargetNode	ExpandedNodeId	The TargetNode of the Reference.

Table 19 – ReferenceListEntryDataType Definition

Attribute		Value
BrowseName		ReferenceListEntryDataType
IsAbstract		FALSE
References	NodeClass		BrowseName	DataType	TypeDefinition	Other
Subtype of Structure defined in OPC 10000-5
Conformance Units
Base Info ReferenceDescription