type t 

val init_contains : t -> string -> unit
val init_naive_contains : t -> string -> unit


val parse_xml_uri : string -> t
val parse_xml_string : string -> t
val save : t -> string -> unit
val load : ?sample:int -> string -> t
val tag_pool : t -> Tag.pool


type 'a node = private int
type node_kind = [ `Tree | `Text ]
val equal : [ `Tree ] node -> [ `Tree ] node -> bool
val compare : [ `Tree ] node -> [ `Tree ] node -> int
val dump_node : 'a node -> string


val nil : 'a node
val root : [ `Tree ] node

val is_root : [ `Tree ] node -> bool
val is_nil : [ `Tree ] node -> bool

val parent : t -> [ `Tree ] node -> [ `Tree ] node
val first_child : t -> [ `Tree ] node -> [ `Tree ] node
val tagged_child : t -> Tag.t -> [ `Tree ] node -> [ `Tree ] node

val select_child : t -> Ptset.Int.t -> [ `Tree ] node -> [ `Tree ] node

val next_sibling : t -> [ `Tree ] node -> [ `Tree ] node
val next_sibling_ctx : t -> [ `Tree ] node -> [ `Tree ] node ->  [ `Tree ] node

val tagged_sibling : t ->  Tag.t ->  [ `Tree ] node -> [ `Tree ] node
val tagged_sibling_ctx : t -> Tag.t -> [ `Tree ] node -> [ `Tree ] node -> [ `Tree ] node

val select_sibling : t -> Ptset.Int.t -> [ `Tree ] node -> [ `Tree ] node
val select_sibling_ctx : t -> Ptset.Int.t -> [ `Tree ] node -> [ `Tree ] node -> [ `Tree ] node 



val tag : t -> [ `Tree ] node -> Tag.t
val id : t -> [ `Tree ] node -> int

val tagged_desc : t -> Tag.t -> [ `Tree ] node -> [`Tree] node
val select_desc : t -> Ptset.Int.t -> [ `Tree ] node -> [`Tree] node

val tagged_foll_ctx : t -> Tag.t ->  [ `Tree ] node -> [`Tree] node -> [ `Tree ] node
val select_foll_ctx : t -> Ptset.Int.t ->  [ `Tree ] node -> [`Tree] node -> [ `Tree ] node

val count : t -> string -> int
val print_xml_fast : out_channel -> t -> [ `Tree ] node -> unit

val tags_below : t -> Tag.t -> Ptset.Int.t
val tags_after : t -> Tag.t -> Ptset.Int.t
val tags : t ->  Tag.t  -> Ptset.Int.t*Ptset.Int.t
val is_below_right : t ->  [`Tree] node ->  [`Tree] node -> bool
val is_left : t ->  [`Tree] node -> bool

val binary_parent : t ->  [`Tree] node -> [`Tree] node 

val count_contains : t -> string -> int
val unsorted_contains : t -> string -> unit
val text_size : t -> int
val doc_ids : t ->  [`Tree] node ->  [`Text] node *  [`Text] node 
val subtree_tags : t -> Tag.t ->  [`Tree] node -> int
val get_text : t -> [`Tree] node ->  string

val dump_tree : Format.formatter -> t -> unit