fstrmepsilon(1)

✨ fstrmepsilon — it's giving "epsilon removal" 💅

okay so bestie, welcome to fstrmepsilon(1), a little User Commands girly from the OpenFst family 🦋 she's the one you call when your FST is full of epsilons and you simply cannot anymore.

---

🌸 NAME 🌸

fstrmepsilon — removes epsilons from an FST. that's it. that's the whole job. 🎀

---

✨ SYNOPSIS ✨

fstrmepsilon [OPTIONS] [in.fst [out.fst]]

---

💖 DESCRIPTION 💖

Removes epsilons from an FST. iconic behaviour, no cap. 💅

---

🫶 OPTIONS 🫶

heads up bestie: boolean options accept either true or false as a value, OR they just implicitly mean true if you don't give them a value at all. slay, the flags are flexible like that ✨

• --connect[=BOOLEAN] — trim the output. default: true.
• --delta=VALUE — sets the comparison/quantization delta. default: 0.000976562.
• --fst_align[=BOOLEAN] — write FST data aligned where appropriate. default: false.
• --fst_compat_symbols[=BOOLEAN] — require symbol tables to match when appropriate. default: true.
• --fst_default_cache_gc[=BOOLEAN] — enable garbage collection of the cache. default: true.
• --fst_default_cache_gc_limit=N — sets the cache byte size that triggers garbage collection. default: 1048576.
• --fst_error_fatal[=BOOLEAN] — if true, FST errors are fatal. otherwise, returned objects get flagged as bad — like, FSTs come back with the kError property set to true, and FST weights get set so that Member() returns false. default: true.
• --fst_field_separator=STRING — sets the characters used as a separator between printed fields. default: " ".
• --fst_read_mode=STRING — sets the default file reading mode for mappable files, either "read" or "map". default: "read".
• --fst_verify_properties[=BOOLEAN] — verify fst properties queried by TestProperties. default: false.
• --fst_weight_parentheses=STRING — sets the characters enclosing the first weight of a printed composite weight (think pair weight, tuple weight, and derived classes) so that nested composite weights do proper I/O 🫶. must have size 0 (none) or 2 (open and close parenthesis). default: no parentheses.
• --fst_weight_separator=CHARACTER — sets the character separator between printed composite weights. default: comma.
• --help[=BOOLEAN] — show usage information. default: false.
• --helpshort[=BOOLEAN] — show brief usage information. default: false.
• --nstate=NUMBER — sets the state number threshold. default: -1.
• --queue_type=TYPE — sets the queue type, one of auto, fifo, lifo, shortest, state, and top. default: auto.
• --reverse[=BOOLEAN] — perform in the reverse direction. default: false.
• --save_relabel_ipairs=FILENAME — save input relabel pairs to file. default: do not save.
• --save_relabel_opairs=FILENAME — save output relabel pairs to file. default: do not save.
• --tmpdir=PATHNAME — sets the temporary directory to use. default: /tmp.
• --v[=N] — sets the verbosity level. default: 0.
• --weight=THRESHOLD — sets the weight threshold. default: "".

---

👑 SEE ALSO 👑

your whole friend group is here, go say hi 💜

fstarcsort(1), fstclosure(1), fstcompile(1), fstcompose(1), fstcompress(1), fstconcat(1), fstconnect(1), fstconvert(1), fstdeterminize(1), fstdifference(1), fstdisambiguate(1), fstdraw(1), fstencode(1), fstepsnormalize(1), fstequal(1), fstequivalent(1), fstinfo(1), fstintersect(1), fstinvert(1), fstisomorphic(1), fstlinear(1), fstloglinearapply(1), fstmap(1), fstminimize(1), fstprint(1), fstproject(1), fstprune(1), fstpush(1), fstrandgen(1), fstrelabel(1), fstreplace(1), fstreverse(1), fstreweight(1), fstshortestdistance(1), fstshortestpath(1), fstsymbols(1), fstsynchronize(1), fsttopsort(1), fstunion(1)

---

✨ that's the whole page bestie, go forth and de-epsilon ✨

this gorgeous little manual page is from OpenFst 1.8.5, dated Mar 2026. mwah, take care of her 💖🎀🦋