| Kind | Value | annotation | ||
| enumeration | 1_strongly concave with margins overlapping | |||
| enumeration | 2_strongly concave with margins touching | |||
| enumeration | 3_strongly concave | |||
| enumeration | 4_moderately concave | |||
| enumeration | 5_weakly concave | |||
| enumeration | 6_flat | |||
| enumeration | 7_weakly convex | |||
| enumeration | 8_moderately convex | |||
| enumeration | 9_strongly convex | |||
| enumeration | 10_strongly convex with margins touching | |||
| enumeration | 11_strongly convex with margins overlapping |