| Kind | Value | annotation | ||
| enumeration | 1_none | |||
| enumeration | 2_distal quarter | |||
| enumeration | 3_basal half | |||
| enumeration | 4_basal quarter | |||
| enumeration | 5_at base | |||
| enumeration | 6_marginal zone | |||
| enumeration | 7_midribs | |||
| enumeration | 8_midribs and marginal zone | |||
| enumeration | 9_along veins |