-val patch_xml : string -> string
-val patch_xsl : string -> string
-val patch_dtd : string -> string
+val patch_xml : ?via_http:bool -> unit -> string -> string
+val patch_dtd : ?via_http:bool -> unit -> string -> string
+ (* TODO via_http not yet supported for patch_xsl *)
+val patch_xsl : ?via_http:bool -> unit -> string -> string