class[< clone : 'a; node : 'a Pxp_document.node;hash_index :
set_node : 'a Pxp_document.node -> unit; .. >
as 'a]object..end
Pxp_tree_parser.index using
a hash table.method add : string -> 'a Pxp_document.node -> unitPxp_tree_parser.ID_not_unique
is raised.method find : string -> 'a Pxp_document.nodeNot_foundmethod index : (string, 'a Pxp_document.node) Hashtbl.t