class c :Redland Uri class.string ->
object
..end
method repr : Rdf.repr
method is_valid : bool
method to_string : string
method equals : (< clone : 'b; equals : 'a; is_valid : bool; repr : Rdf.repr;
to_string : string; .. >
as 'b) ->
bool as 'a
method clone : 'b