| Kind | Value | annotation | ||
| enumeration | 6_Shallow to Deep | |||
| enumeration | 5_Deep - Depth 50 or less of Kernel | |||
| enumeration | 4_Middeep - Deep | |||
| enumeration | 3_Middeep - Depth 35 or less of Kernel | |||
| enumeration | 2_Shallow - Middeep | |||
| enumeration | 1_Shallow - Depth 20 or less of Kernel |