Indicates that a check box or other boolean indicator is in a state other than checked or not checked.
This usually means that the boolean value reflected or controlled by the object does not apply consistently to the entire current
context. For example, a checkbox for the "Bold" attribute of text may have ATSPI_STATE_INDETERMINATE if the currently
selected text contains a mixture of weight attributes. In many cases interacting with a ATSPI_STATE_INDETERMINATE object will
cause the context's corresponding boolean attribute to be homogenized, whereupon the object will lose ATSPI_STATE_INDETERMINATE
and a corresponding state-changed event will be fired.