Save this configuration data into an xml.dom.Element object.

def save_xml(self, doc, element):
        '''Save this configuration data into an xml.dom.Element object.'''
        element.setAttributeNS(RTS_NS, RTS_NS_S + 'name', self.name)
        if self.data:
            element.setAttributeNS(RTS_NS, RTS_NS_S + 'data', self.data)