| Kind | Value | annotation | ||
| enumeration | 4_square | |||
| enumeration | 9_hornshaped | |||
| enumeration | 8_narrowly triangular | |||
| enumeration | 7_moderately triangular | |||
| enumeration | 6_trapezoidal | |||
| enumeration | 5_rectangular | |||
| enumeration | 3_cordate | |||
| enumeration | 2_circular | |||
| enumeration | 1_oblate |