+ | 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 |