DeleteReferences – OPC Unified Architecture

5.8.5 DeleteReferences

5.8.5.1 Description

This Service is used to delete one or more References of a Node.

When any of the References deleted by an invocation of this Service are contained in a View, then the ViewVersion Property is updated if this Property is supported.

Table 31 defines the parameters for the Service.

Table 31 – DeleteReferences Service Parameters

Name	Type	Description
Request
requestHeader	RequestHeader	Common request parameters (see 7.32 for RequestHeader definition).
referencesToDelete []	DeleteReferences Item	List of References to delete. This structure is defined in-line with the following indented items.
sourceNodeId	NodeId	NodeId of the Node that contains the Reference to delete.
referenceTypeId	NodeId	NodeId of the ReferenceType that defines the Reference to delete.
isForward	Boolean	If the value is TRUE, the Server deletes a forward Reference. If the value is FALSE, the Server deletes an inverse Reference.
targetNodeId	ExpandedNodeId	NodeId of the TargetNode of the Reference. If the Server index indicates that the TargetNode is a remote Node, then the nodeId shall contain the absolute namespace URI. If the TargetNode is a local Node the nodeId shall contain the namespace index.
deleteBidirectional	Boolean	A Boolean parameter with the following values: TRUE delete the specified Reference and the opposite Reference from the TargetNode. If the TargetNode is located in a remote Server, the Server is permitted to delete the specified Reference only. FALSE delete only the specified Reference.

Response
responseHeader	ResponseHeader	Common response parameters (see 7.33 for ResponseHeader definition).
results []	StatusCode	List of StatusCodes for the References to delete (see 7.38 for StatusCode definition). The size and order of the list matches the size and order of the referencesToDelete request parameter.
diagnosticInfos []	DiagnosticInfo	List of diagnostic information for the References to delete (see 7.12 for DiagnosticInfo definition). The size and order of the list matches the size and order of the referencesToDelete request parameter. This list is empty if diagnostics information was not requested in the request header or if no diagnostic information was encountered in processing of the request.

5.8.5.2 Service results

Table 32 defines the Service results specific to this Service. Common StatusCodes are defined in Table 178.

Table 32 – DeleteReferences Service Result Codes

Symbolic Id	Description
Bad_NothingToDo	See Table 178 for the description of this result code.
Bad_TooManyOperations	See Table 178 for the description of this result code.

5.8.5.3 StatusCodes

Table 33 defines values for the results parameter that are specific to this Service. Common StatusCodes are defined in Table 179.

Table 33 – DeleteReferences Operation Level Result Codes

Symbolic Id	Description
Bad_SourceNodeIdInvalid	See Table 179 for the description of this result code.
Bad_ReferenceTypeIdInvalid	See Table 179 for the description of this result code.
Bad_ServerIndexInvalid	The Server index is not valid.
Bad_TargetNodeIdInvalid	See Table 179 for the description of this result code.
Bad_UserAccessDenied	See Table 178 for the description of this result code.
Bad_NoDeleteRights	See Table 179 for the description of this result code.