The input range defines the type(s) of data which a uxi:UIElement can consume. This can be used to choose UIElements automatically. E.g. in the case of a date picker this could be https://schema.org/Date or https://schema.org/DateTime. For the (sub-)uxi:UIElement for selecting a year inside that date picker, a uxi:UIPropertyValueSpecification could be used to narrow down the selection. Also useful for converting, sending or receiving data.