The java.lang.Character.Subset class defines a large number of constants.
Most of these correspond directly to subsets ("blocks") defined in the
Unicode standard. A few of the constants, however, were added solely to
support implementors of input-method engines and, as such, are intentionally
ill-defined.

The java.lang.Character class is the focal point for the Unicode character
set, which is central to the Java platform. It should not be polluted by
concepts that are not directly related to and defined by the Unicode
specification.

-- mr@eng 9/15/1998