check out X: http://en.wikipedia.org/wiki/List_of_XML_markup_languages all the best, Don -- Don Brutzman Naval Postgraduate School, Code USW/Br brutzman at nps.edu Watkins 270 MOVES Institute, Monterey CA 93943-5000 USA +1.831.656.2149 X3D, virtual worlds, underwater robots http://faculty.nps.edu/brutzman