| Symbol | Specification | Kind | Type |
|---|---|---|---|
| # . | string | f | String → Nat |
| . + . | nat-basic | f | Nat × Nat → Nat |
| . + . | string | f | Char × String → String |
| . + . | string | f | String × String → String |
| . + . | string | f | String × Char → String |
| . +1 | nat-basic | f | Nat → Nat |
| . - . | nat | pf | Nat × Nat → Nat with λ n, m. n ≥ m |
| . -1 | nat-basic | pf | Nat → Nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | Nat × Nat |
| . > . | nat | p | Nat × Nat |
| . ∈ . | string | p | Char × String |
| . ≤ . | nat | p | Nat × Nat |
| . ≥ . | nat | p | Nat × Nat |
| . head | string | pf | String → Char with λ s. s ≠ [] |
| . tail | string | pf | String → String with λ s. s ≠ [] |
| [] | string | c | String |
| Char | char | s | |
| Nat | nat-basic | s | |
| String | string | s | |
| c | string | v | Char |
| s | string | v | String |
| str | string | f | Char → String |