val sexp_of_uint8 : Stdint.Uint8.t -> Sexplib.Sexp.t
val sexp_of_uint32 : Stdint.Uint32.t -> Sexplib.Sexp.t
val expect_element : Base.String.t -> ((string * string) list -> Xml.xml list -> 'a) -> Xml.xml -> 'a
val expect_pcdata : Xml.xml Base.List.t -> string
val require_attribute : string -> string -> 'a option -> 'a
val bool_of_xsd_boolean : string -> bool