This attribute controls whether a RegionRegion represents the "inside" or
the "outside" of the area which was supplied when the Region was
created. If the attribute value is zero (the default), the Region
represents the inside of the original area. However, if it is non-zero,
it represents the outside of the original area. The value of this
attribute may be toggled using the
astNegateastNegate function.
Note, whether the boundary is considered to be inside the Region or
not is controlled by the ClosedClosed attribute. Changing the value of
the Negated attribute does not change the value of the Closed attribute.
Thus, if Region is closed, then the boundary of the Region will be
inside the Region, whatever the setting of the Negated attribute.