| Symbol | Specification | Kind | Type |
|---|---|---|---|
| # . | fidbag | f | fidbag → nat |
| . + . | nat-basic | f | nat × nat → nat |
| . ++ . | fidbag | f | fidbag × fid → fidbag |
| . +1 | nat-basic | f | nat → nat |
| . - . | nat | pf | nat × nat → nat with λ n, m. n ≥ m |
| . -- . | fidbag | f | fidbag × fid → fidbag |
| . -1 | nat-basic | pf | nat → nat with λ n. n ≠ 0 |
| . < . | nat-basic | p | nat × nat |
| . > . | nat | p | nat × nat |
| . \ . | fidbag | f | fidbag × fidbag → fidbag |
| . ∈ . | fidbag | p | fid × fidbag |
| . ∪ . | fidbag | f | fidbag × fidbag → fidbag |
| . ≤ . | nat | p | nat × nat |
| . ≥ . | nat | p | nat × nat |
| . ⊆ . | fidbag | p | fidbag × fidbag |
| { . } | fidbag | f | fid → fidbag |
| ∅ | fidbag | c | fidbag |
| count | fidbag | f | fid × fidbag → nat |
| fid | file-id | s | |
| fid | file-id | v | fid |
| fid0 | fidbag | v | fid |
| fid1 | fidbag | v | fid |
| fidb | fidbag | v | fidbag |
| fidb0 | fidbag | v | fidbag |
| fidb1 | fidbag | v | fidbag |
| fidb2 | fidbag | v | fidbag |
| fidbag | fidbag | 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 |