/*
 * call-seq:
 *  sub_elements
 *
 * A list of allowed sub elements for this element.
 */
static VALUE sub_elements(VALUE self)
{
  htmlElemDesc * description;
  VALUE list;
  int i;

  Data_Get_Struct(self, htmlElemDesc, description);

  list = rb_ary_new();

  if(NULL == description->subelts) return list;

  for(i = 0; description->subelts[i]; i++) {
    rb_ary_push(list, NOKOGIRI_STR_NEW2(description->subelts[i]));
  }

  return list;
}