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

        Parameters
        ----------
        uniformly_sampled_xml : Label or ElementTree Element
            Portion of the label describing this Uniformly Sampled field.

        Returns
        -------
        Meta_FieldUniformlySampled
            Contains meta data for a Uniformly_Sampled field.
        """
    obj = cls()
    obj._load_keys_from_xml(uniformly_sampled_xml, tag_modify=(
        'sampling_parameter_', ''))
    obj.full_location = [{'field': obj['name']}]
    keys_must_exist = ['name', 'interval', 'first_value', 'last_value']
    obj._check_keys_exist(keys_must_exist)
    return obj
