Saves the settings for this dataset to the inputted parent xml.
        
        :param      xparent | <xml.etree.ElementTree.Element>

def toXml(self, xparent):
        """
        Saves the settings for this dataset to the inputted parent xml.
        
        :param      xparent | <xml.etree.ElementTree.Element>
        """
        for key, value in self.items():
            elem = ElementTree.SubElement(xparent, 'entry')
            typ = type(elem).__name__

            elem.set('key', key)
            elem.set('type', typ)

            if typ in DataSet._xmlTypes:
                DataSet._xmlTypes[typ][0](elem, value)
            else:
                elem.set('value', nstr(value))