可以把 QML 类型导入应用程序，使用以下 import 语句在 .qml 文件：
import QtOpcUa 5.12 as QtOpcUa
To link against the module, add the following QT variable to your cmake 工程文件：
target_link_libraries(mytarget Qt::OpcUa)
| ApplicationDescription | OPC UA ApplicationDescription |
| AttributeOperand | OPC UA AttributeOperand type |
| AuthenticationInformation | OPC UA authentication information |
| Connection | Connects to a server |
| ElementOperand | OPC UA ElementOperand type |
| EndpointDescription | OPC UA EndpointDescription |
| EndpointDiscovery | Provides information about available endpoints on a server |
| EventFilter | Defines an EventFilter for a monitored item |
| FilterElement | OPC UA ContentFilterElement |
| LiteralOperand | OPC UA LiteralOperand type |
| LocalizedText | Contains a text with associated locale |
| MethodArgument | Arguments for OpcUa method calls |
| MethodNode | Calls a method on the server |
| Node | Represents a node on a server |
| NodeId | Specifies a node by an identifier |
| ReadItem | Specifies an item to be read from the server |
| ReadResult | Contains result data after reading from the server |
| RelativeNodeId | Specifies a relative node by a start node and a path |
| RelativeNodePath | Specifies a relative node path element |
| ServerDiscovery | Provides information about available servers |
| SimpleAttributeOperand | OPC UA SimpleAttributeOperand type |
| Status | Code of an OPC UA function |
| UserTokenPolicy | OPC UA ApplicationDescription |
| ValueNode | Represents a value node from a server |
| WriteItem | Specifies an item to be written to the server |
| WriteResult | Contains result data after writing to the server |
