code: def get_element_desc(element, ar_tree, ns):
      # type: (_Element, _DocRoot, str) -> str
      
      desc = get_child(element, "DESC", ar_tree, ns)
      txt = get_child(desc, 'L-2[@L="DE"]', ar_tree, ns)
      if txt is None:
          txt = get_child(desc, 'L-2[@L="EN"]', ar_tree, ns)
      if txt is None:
          txt = get_child(desc, 'L-2', ar_tree, ns)
      if txt is not None:
          return txt.text
      else:
          return ""
docs: Get element description from XML.