code: def parse_Element(self, node):
          
          handlerMethod = getattr(self, "do_%s" % node.tagName)
          handlerMethod(node)
docs: parse an element
          
          An XML element corresponds to an actual tag in the source:
          <xref id='...'>, <p chance='...'>, <choice>, etc.
          Each element type is handled in its own method.  Like we did in
          parse(), we construct a method name based on the name of the
          element ("do_xref" for an <xref> tag, etc.) and
          call the method.