+ 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