def get_roles():
    """Return information about the available basis set roles available

    The returned data is a map of role to display name. The format
    can be passed as the role argument to fmt argument to :func:`lookup_basis_by_role`
    """
    return {'orbital': 'Orbital basis', 'jfit': 'J-fitting', 'jkfit':
        'JK-fitting', 'rifit': 'RI-fitting', 'optri':
        'Optimized RI-fitting', 'admmfit':
        'Auxiliary-Density Matrix Method Fitting', 'dftxfit':
        'DFT Exchange Fitting', 'dftjfit': 'DFT Correlation Fitting'}
