ps -- ParsedSoap instance

def parse(self, ps, **kw):
        '''
        ps -- ParsedSoap instance
        '''
        namespaceURI = self.wsAddressURI
        elements = ("MessageID","Action","To","From","RelatesTo")
        d = {namespaceURI:elements}
        typecodes = self._getWSAddressTypeCodes(**d)
        pyobjs = ps.ParseHeaderElements(typecodes)
        self._messageID = pyobjs[(namespaceURI,elements[0])]
        self._action = pyobjs[(namespaceURI,elements[1])]
        self._addressTo = pyobjs[(namespaceURI,elements[2])]
        self._from = pyobjs[(namespaceURI,elements[3])]
        self._relatesTo = pyobjs[(namespaceURI,elements[4])]