| + | Coordination. Addition (plus sign). Table 1a |
| / | Consecutive extension (oblique stroke sign). Table 1a |
| : | Simple relation (colon sign). Table 1b |
| :: | Order-fixing (double colon sign). Table 1b |
| [] | Subgrouping (square brackets). Table 1b |
| * | Introduces non-UDC notation (asterisk). Table 1h |
| A/Z | Direct alphabetical specification. Table 1h |
