@classmethod
def from_label(cls, field_xml):
    """ Initializes the meta data from an XML description of the Field.

        Parameters
        ----------
        field_xml : Label or ElementTree Element
            Portion of the label describing this Field.

        Returns
        -------
        Meta_Field
            Contains meta data for the field.
        """
    obj = cls()
    obj._load_keys_from_xml(field_xml, tag_modify=('field_', ''))
    obj._check_keys_exist(['name'])
    return obj
