('_', Field(6, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31))
('mmode', Field(6,))
('mask', Field(8, 10, 11))
('elwidth', Field(12, 13))
('ewsrc', Field(14, 15))
('subvl', Field(16, 17))
('mode', Mode({'_': Field(27, 28, 29, 30, 31), 'sel': Field(27, 28)}))
('smask', Field(24, 25, 26))
('extra', Extra({'_': Field(18, 19, 20, 21, 22, 23, 24, 25, 26)}))
('extra2', Extra2({'_': Field(18, 19, 20, 21, 22, 23, 24, 25, 26), 'idx0': Field(18, 19), 'idx1': Field(20, 21), 'idx2': Field(22, 23), 'idx3': Field(24, 25)}))
('extra3', Extra3({'_': Field(18, 19, 20, 21, 22, 23, 24, 25, 26), 'idx0': Field(18, 19, 20), 'idx1': Field(21, 22, 23), 'idx2': Field(24, 25, 26)}))
('SNZ', Field(15,))
('VLi', Field(27,))
('inv', Field(29,))
('CR', Field(30, 31))
('zz', Field(14,))