def get_discipline_area(label):
    """ Search a PDS4 label for a Discipline_Area.

    Parameters
    ----------
    label : Label or ElementTree Element
        Full label for a PDS4 product with-in which to look for a discipline area.

    Returns
    -------
    Label, ElementTree Element or None
        Found Discipline_Area section with same return type as *label*, or None if not found.
    """

    return label.find('*/Discipline_Area')