exception Not_competent
exception Not_resolvable of exn
class type resolver =
  object
    method change_encoding : string -> unit
    method clone : resolver
    method close_all : unit
    method close_in : unit
    method init_rep_encoding : Pxp_types.rep_encoding -> unit
    method init_warner : Pxp_types.collect_warnings -> unit
    method open_in : Pxp_types.ext_id -> Lexing.lexbuf
    method rep_encoding : Pxp_types.rep_encoding
  end
class resolve_read_url_channel :
  ?base_url:Neturl.url ->
  ?close:(in_channel -> unit) ->
  url_of_id:(Pxp_types.ext_id -> Neturl.url) ->
  channel_of_url:(Pxp_types.ext_id ->
                  Neturl.url -> in_channel * Pxp_types.encoding option) ->
  unit -> resolver
type spec = [ `Not_recognized | `Allowed | `Required]
val make_file_url :
  ?system_encoding:Netconversion.encoding ->
  ?enc:Netconversion.encoding -> string -> Neturl.url
type combination_mode = Public_before_system | System_before_public
class combine :
  ?prefer:resolver ->
  ?mode:combination_mode ->
  resolver list ->
  object
    val mutable active_resolver : resolver option
    val mutable clones : combine list
    val mutable internal_encoding : Pxp_types.rep_encoding
    val mode : combination_mode
    val prefered_resolver : resolver option
    val resolvers : resolver list
    val mutable warner : Pxp_types.drop_warnings
    method change_encoding : string -> unit
    method clone : combine
    method close_all : unit
    method close_in : unit
    method init_rep_encoding : Pxp_types.rep_encoding -> unit
    method init_warner : Pxp_types.collect_warnings -> unit
    method open_in : Pxp_types.ext_id -> Lexing.lexbuf
    method rep_encoding : Pxp_types.rep_encoding
  end