Description of the illustration object_type

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