OPC Studio User's Guide and Reference
Union data type
Concepts > QuickOPC Concepts > QuickOPC Extensions > QuickOPC Integrated Extensions > OPC UA Complex Data Extension > Generic data and data types > Working with data types > Generic Data Type Kinds > Union data type

The union data type represents a (tagged) union.

In data type dictionary model (the only model before OPC UA 1.04), union data is not directly available. A union can, however, be quite efficiently modeled using an appropriately formed structure with optional fields.

The DataFields Property contains a collection of data fields of the union data type. Each such data field is an instance of DataField Class, and specifies:

See Also