The type the input's string value is converted to and from.
The element's view type, if initializing MVC.
The element's data type, if initializing MVC.
The element's model type, if initializing MVC.
The element's emitter type, if initializing MVC.
Properties to initialize a GradumInput. Extends
GradumRichElementProperties without element and elementTag, which the input sets itself.
The tag of the inner input element.