| Symbol | Specification | Kind | Type |
|---|---|---|---|
| . ≪1 . | lexical-param | p | Elem1 × Elem1 |
| . ≪2 . | lexical-param | p | Elem2 × Elem2 |
| Elem1 | lexical-param | s | |
| Elem2 | lexical-param | s | |
| a | lexical | v | Elem1 |
| b | lexical | v | Elem2 |
| iHPQ | lexical | v | Elem1 × Elem2 → Bool |
| lex< | lexical | p | Elem1 × Elem2 × Elem1 × Elem2 |