base
Type: String
Required: Yes
"base": "TcHmi.Controls.System.TcHmiControl"
This property determines whether the control inherits the properties of another control. By default, a framework control inherits all properties of Description.json of the base control TcHmi.Controls.System.TcHmiControl, which defines a base framework for all TwinCAT HMI controls. The control can be made to inherit from other controls, such as a button, if a particular control is to be extended. The control name that must be specified here corresponds to the control type including its namespace, which are defined in Description.json.
 | Validity This property must refer to a valid control and must not have the value |