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Signature symbols in this unit

Symbol	Specification	Kind	Type
# .	dir-entries	f	stringset → nat
# .	dir-entries	f	dir-entries → nat
# .	string	f	string → nat
. '	string	f	char → string
. + .	nat-basic	f	nat × nat → nat
. + .	string	f	char × string → string
. + .	string	f	string × char → string
. + .	string	f	string × string → string
. ++ .	dir-entries	f	stringset × string → stringset
. ++ .	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
. -- .	dir-entries	f	dir-entries × string → dir-entries
. -- .	dir-entries	f	stringset × string → stringset
. -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 str. str ≠ ""
. .char1	string	pf	string → char with λ str. str ≠ ""
. .entries	abstract-dir	f	abstract-dir → dir-entries
. .entries:= .	abstract-dir	f	abstract-dir × dir-entries → abstract-dir
. .last	string	pf	string → char with λ str. str ≠ ""
. .meta	abstract-dir	f	abstract-dir → metadata
. .meta:= .	abstract-dir	f	abstract-dir × metadata → abstract-dir
. .nlink	abstract-dir	f	abstract-dir → nat
. .nlink:= .	abstract-dir	f	abstract-dir × nat → abstract-dir
. .nsubdirs	abstract-dir	f	abstract-dir → nat
. .nsubdirs:= .	abstract-dir	f	abstract-dir × nat → abstract-dir
. .rstring	string	pf	string → string with λ str. str ≠ ""
. .size	abstract-dir	f	abstract-dir → nat
. .size:= .	abstract-dir	f	abstract-dir × nat → abstract-dir
. < .	nat-basic	p	nat × nat
. > .	nat	p	nat × nat
. [ . ]	dir-entries	pf	dir-entries × string → nat with λ entries, str. str ∈ entries
. [ . ]	string	pf	string × nat × char → string with λ str, n, char. n < # str
. [ . ]	string	pf	string × nat → char with λ str, n. n < # str
. [ . ]	dir-entries	f	dir-entries × string × nat → dir-entries
. \ .	dir-entries	f	stringset × stringset → stringset
. \ .	dir-entries	f	dir-entries × stringset → dir-entries
. \| .	dir-entries	f	dir-entries × stringset → dir-entries
. ∈ .	dir-entries	p	nat × dir-entries
. ∈ .	dir-entries	p	string × stringset
. ∈ .	dir-entries	p	string × dir-entries
. ∈ .	string	p	char × string
. ∩ .	dir-entries	f	stringset × stringset → stringset
. ∪ .	dir-entries	f	stringset × stringset → stringset
. ≤ .	nat	p	nat × nat
. ≥ .	nat	p	nat × nat
. ⊆ .	dir-entries	p	stringset × stringset
. ⊆ .	dir-entries	p	dir-entries × dir-entries
. ⊑ .	string	p	string × string
. ⊒ .	string	p	string × string
. ⊕ .	dir-entries	f	dir-entries × dir-entries → dir-entries
{ . }	dir-entries	f	string → stringset
∅	dir-entries	c	dir-entries
∅	dir-entries	c	stringset
⊏	string	p	string × string
abstract-dir	abstract-dir	s
ad	abstract-dir	v	abstract-dir
butlastn	string	pf	nat × string → string with λ n, str. n ≤ # str
char	char	s
char	char	v	char
char0	char	v	char
char1	char	v	char
char2	char	v	char
dir-entries	dir-entries	s
disj	string	p	string × string
dom .	dir-entries	f	dir-entries → stringset
dups	string	p	string
entries	dir-entries	v	dir-entries
entries0	dir-entries	v	dir-entries
entries1	dir-entries	v	dir-entries
entries2	dir-entries	v	dir-entries
fillfirst	string	f	nat × char × string → string
firstn	string	pf	nat × string → string with λ n, str. n ≤ # str
frome	string	f	string × char → string
ino	dir-entries	v	nat
ino0	dir-entries	v	nat
ino1	dir-entries	v	nat
ino2	dir-entries	v	nat
lastn	string	pf	nat × string → string with λ n, str. n ≤ # str
m	nat-basic	v	nat
m0	abstract-dir	v	nat
m1	abstract-dir	v	nat
m2	abstract-dir	v	nat
m3	abstract-dir	v	nat
m4	abstract-dir	v	nat
md	metadata	v	metadata
md0	abstract-dir	v	metadata
metadata	metadata	s
mkdir	abstract-dir	f	nat × metadata × nat × nat × dir-entries → abstract-dir
mklist	string	f	char × nat → string
n	nat-basic	v	nat
n0	nat-basic	v	nat
n1	nat-basic	v	nat
nat	nat-basic	s
pos	string	f	char × string → nat
restn	string	pf	nat × string → string with λ n, str. n ≤ # str
rev	string	f	string → string
rmdup	string	f	string → string
str	string	v	string
str0	string	v	string
str1	string	v	string
str2	string	v	string
str3	string	v	string
string	string	s
strings	dir-entries	v	stringset
strings0	dir-entries	v	stringset
strings1	dir-entries	v	stringset
strings2	dir-entries	v	stringset
stringset	dir-entries	s
sublist	string	pf	nat × nat × string → string with λ n, m, str. n + m ≤ # str