let domImpl = Gdome.domImplementation ()
let helm_ns = Gdome.domString "http://www.cs.unibo.it/helm"
let xlink_ns = Gdome.domString "http://www.w3.org/1999/xlink"
+let mathml_ns = Gdome.domString "http://www.w3.org/1998/Math/MathML"
(* TODO BRRRRR .... *)
(** strip first 4 line of a string, used to strip xml declaration and doctype
val domImpl : Gdome.domImplementation
val helm_ns : Gdome.domString (** HELM namespace *)
val xlink_ns : Gdome.domString (** XLink namespace *)
+val mathml_ns: Gdome.domString (** MathML namespace *)
val strip_xml_headings: string -> string