def readAxes(self):
        """ Read the axes element.
        """
        for axisElement in self.root.findall(".axes/axis"):
            axis = {}
            axis['name'] = name = axisElement.attrib.get("name")
            axis['tag'] = axisElement.attrib.get("tag")
            axis['minimum'] = float(axisElement.attrib.get("minimum"))
            axis['maximum'] = float(axisElement.attrib.get("maximum"))
            axis['default'] = float(axisElement.attrib.get("default"))
            # we're not using the map for anything.
            axis['map'] = []
            for warpPoint in axisElement.findall(".map"):
                inputValue = float(warpPoint.attrib.get("input"))
                outputValue = float(warpPoint.attrib.get("output"))
                axis['map'].append((inputValue, outputValue))
            # there are labelnames in the element
            # but we don't need them for building the fonts.
            self.axes[name] = axis
            self.axesOrder.append(axis['name'])
Read the axes element.