| Symbol | Specification | Kind | Type |
|---|
| # . | string | f | string → nat |
| . ' | string | f | char → string |
| . + . | nat-basic | f | nat × nat → nat |
| . + . | string | f | char × string → string |
| . + . | string | f | string × string → string |
| . + . | string | f | string × char → string |
| . ++ . | string | f | string × char → string |
| . +1 | nat-basic | f | nat → nat |
| . +2 . | string | f | char × char → string |
| . - . | nat | pf | nat × nat → nat with λ n, m. n ≥ m |
| . -1 | nat-basic | pf | nat → nat with λ n. n ≠ 0 |
| . -1l . | string | f | string × char → string |
| . -l . | string | f | string × char → string |
| . -p . | string | f | string × nat → string |
| . .butlast | string | pf | string → string with λ x. x ≠ "" |
| . .char1 | string | pf | string → char with λ x. x ≠ "" |
| . .last | string | pf | string → char with λ x. x ≠ "" |
| . .rstring | string | pf | string → string with λ x. x ≠ "" |
| . < . | nat-basic | p | nat × nat |
| . < . | string-less | p | string × string |
| . < . | string-less | p | char × char |
| . > . | nat | p | nat × nat |
| . [ . ] | string | pf | string × nat → char with λ x, n. n < # x |
| . [ . ] | string | pf | string × nat × char → string with λ x, n, a. n < # x |
| . ∈ . | string | p | char × string |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| . ⊑ . | string | p | string × string |
| . ⊒ . | string | p | string × string |
| ⊏ | string | p | string × string |
| butlastn | string | pf | nat × string → string with λ n, x. n ≤ # x |
| char | char | s | |
| char | string-less | v | char |
| disj | string | p | string × string |
| dups | string | p | string |
| fillfirst | string | f | nat × char × string → string |
| firstn | string | pf | nat × string → string with λ n, x. n ≤ # x |
| frome | string | f | string × char → string |
| lastn | string | pf | nat × string → string with λ n, x. n ≤ # x |
| mklist | string | f | char × nat → string |
| nat | nat-basic | s | |
| pos | string | f | char × string → nat |
| restn | string | pf | nat × string → string with λ n, x. n ≤ # x |
| rev | string | f | string → string |
| rmdup | string | f | string → string |
| sortedchars | string-less | c | string |
| str | string-less | v | string |
| string | string | s | |
| sublist | string | pf | nat × nat × string → string with λ n, m, x. n + m ≤ # x |