The outcome from the analysis of org.a11y.atspi.Value interface realization shows that there is an Efl interface hierarchy with identical functionality: Efl.Ui.Range_Display and inheriting from it Efl.Ui.Range_Interactive. Hence, I propose following changes in ATSPI bridge:
a) remove interface Efl.Access.Value and its realization from widgets like: Efl.Ui.Slider_Interval, Efl.Ui.Slider, Efl.Ui.Spin_Button, Efl.UI.Progressbar, Efl.Ui.Spin b) modify Elm.Atspi.Bridge to use Efl.Ui.Range* interfaces instead of Efl.Access.Value; for widgets that implements Efl.Ui.Range_Display but does not implement Efl.Ui.Range_Interactive return value 0 for MinimumIncrement property