Description of the illustration object_type

[ invoker_rights_clause ]
{ { IS | AS } OBJECT
  | UNDER [schema.]supertype
  } [ sqlj_object_type ]
  [ ( { attribute datatype [ sqlj_object_type_attr ] }...
        [, element_spec [, element_spec ]...]
    )
  [ [NOT] { FINAL | INSTANTIABLE } ]...