<programlisting>
data R (x :: * -> *) y
</programlisting>
+You cannot use <literal>deriving</literal> on a data type declaration; write in
+<literal>instance</literal> declaration instead.
</para></listitem>
<listitem><para> Class declarations is exactly as in Haskell, except that you may not put
-default method declarations. You can also omit all the class methods entirely.
+default method declarations. You can also omit all the superclasses and class
+methods entirely; but you must either omit them all or put them all in.
</para></listitem>
-<listitem><para> Do not include instance declarations. There is a complication to do with
-how the dictionary functions are named. It may well work, but it's not a well-tested feature.
+<listitem><para> You can include instance declarations just as in Haskell; but omit the "where" part.
</para></listitem>
</itemizedlist>
</para>