| Symbol | Specification | Kind | Type |
|---|---|---|---|
| # . | fidset | f | fidset → nat |
| . + . | nat-basic | f | nat × nat → nat |
| . ++ . | fidset | f | fidset × fid → fidset |
| . +1 | nat-basic | f | nat → nat |
| . - . | nat | pf | nat × nat → nat with λ n, m. n ≥ m |
| . -- . | fidset | f | fidset × fid → fidset |
| . -1 | nat-basic | pf | nat → nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | nat × nat |
| . > . | nat | p | nat × nat |
| . \ . | fidset | f | fidset × fidset → fidset |
| . ∈ . | fidset | p | fid × fidset |
| . ∩ . | fidset | f | fidset × fidset → fidset |
| . ∪ . | fidset | f | fidset × fidset → fidset |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| . ⊆ . | fidset | p | fidset × fidset |
| { . } | fidset | f | fid → fidset |
| ∅ | fidset | c | fidset |
| fid | file-id | s | |
| fid | file-id | v | fid |
| fid0 | fidset | v | fid |
| fid1 | fidset | v | fid |
| fids | fidset | v | fidset |
| fids0 | fidset | v | fidset |
| fids1 | fidset | v | fidset |
| fids2 | fidset | v | fidset |
| fidset | fidset | s | |
| m | nat-basic | v | nat |
| n | nat-basic | v | nat |
| n0 | nat-basic | v | nat |
| n1 | nat-basic | v | nat |
| nat | nat-basic | s |