AttributeOperand QML Type

The OPC UA AttributeOperand type. 更多...

导入语句：	import QtOpcUa
Since:	QtOpcUa 5.13

所有成员列表，包括继承成员

特性

alias : string
browsePath : list<OpcUaNodeId>
indexRange : string
nodeAttribute : Constants.NodeAttribute
typeId : string

详细描述

The AttributeOperand is defined in OPC-UA part 4, 7.4.4.4. It has the same purpose as SimpleAttributeOperand but has more configurable options.

特性文档编制

alias : string

Alias name for the operand. This allows using this instance as operand for other operations in the filter.

browsePath : list < OpcUaNodeId >

Browse path to the node holding the attribute.

import QtOpcUa as QtOpcUa
QtOpcUa.AttributeOperand {
    ...
    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.AttributeOperand {
    ...
    indexRange: "0:2"
}

nodeAttribute : 常量 . NodeAttribute

Attribute of the node browsePath is pointing to. The default value is Constants.NodeAttribute.Value .

import QtOpcUa as QtOpcUa
QtOpcUa.AttributeOperand {
    ...
    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.

import QtOpcUa as QtOpcUa
QtOpcUa.AttributeOperand {
    ...
    typeId: "ns=0;i=2041"
}