+ (** check whether no objects are defined below a given baseuri *)
+val is_empty: string -> bool
+
+(** removes a file if it exists *)
+val safe_remove: string -> unit
+(** removes a dir if it exists and is empty *)
+val safe_rmdir: string -> unit
+(** checks if the dir is empty *)
+val is_dir_empty: string -> bool
+(** removes a directory and recursively the father (if empty) *)
+val rmdir_descend: string -> unit
+
+val absolute_path: string -> string