SimpleAttributeOperand QML Type
The OPC UA SimpleAttributeOperand type. More...
| Import Statement: | import QtOpcUa |
| Since: | QtOpcUa 5.13 |
| Status: | Deprecated since 6.9 |
This type is deprecated since QtOpcUa 6.9. We strongly advise against using it in new code.
Properties
- browsePath : list<OpcUaNodeId>
- indexRange : string
- nodeAttribute : Constants.NodeAttribute
- typeId : string
Detailed Description
The SimpleAttributeOperand is specified in OPC UA 1.05 part 4, 7.7.4.5. It is used when a node attribute is required as operand.
For example, the following simple attribute operand represents the value of the "Severity" field of the base event type:
import QtOpcUa as QtOpcUa QtOpcUa.SimpleAttributeOperand { identifier: "Severity" ns: "http://opcfoundation.org/UA/" }
Property Documentation
browsePath : list<OpcUaNodeId> |
Browse path to the node holding the attribute.
import QtOpcUa as QtOpcUa QtOpcUa.SimpleAttributeOperand { ... browsePath: [ QtOpcUa.NodeId { identifier: "Message" ns: "http://opcfoundation.org/UA/" } ... ] }
indexRange : string |
Index range string used to identify a single value or subset of the attribute's value.
import QtOpcUa as QtOpcUa QtOpcUa.SimpleAttributeOperand { ... indexRange: "0:2" }
nodeAttribute : Constants.NodeAttribute |
Attribute of the node browsePath is pointing to. The default value is Constants.NodeAttribute.Value.
import QtOpcUa as QtOpcUa QtOpcUa.SimpleAttributeOperand { ... nodeAttribute: QtOpcUa.Constants.NodeAttribute.Value }
typeId : string |
Node id of the type definition node. The operand will be of the type or one of its subtypes. The default value is "ns=0;i=2041".
import QtOpcUa as QtOpcUa QtOpcUa.SimpleAttributeOperand { ... typeId: "ns=0;i=2041" }