---
name: "hfst-txt2fst"
section: "1"
platform: "linux"
package: "hfst"
version: "3.16.2-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/hfst-txt2fst"
---

# hfst-txt2fst(1)

\=Convert AT&T or prolog format into a binary transducer

## NAME

hfst-txt2fst - =Convert AT&T or prolog format into a binary transducer

## SYNOPSIS

**hfst-txt2fst** \[*OPTIONS*...\] \[*INFILE*\]

## DESCRIPTION

Convert AT&T or prolog format into a binary transducer

### Common options:

- **-h**, **--help**

  Print help message

- **-V**, **--version**

  Print version info

- **-v**, **--verbose**

  Print verbosely while processing

- **-q**, **--quiet**

  Only print fatal erros and requested output

- **-s**, **--silent**

  Alias of **--quiet**

### Input/Output options:

- **-i**, **--input**=*INFILE*

  Read input transducer from INFILE

- **-o**, **--output**=*OUTFILE*

  Write output transducer to OUTFILE

### Text and format options:

- **-f**, **--format**=*FMT*

  Write result using FMT as backend format

- **-e**, **--epsilon**=*EPS*

  Interpret string EPS as epsilon in att format

- **-p**, **--prolog**

  Read prolog format instead of att

- **-j**, **--disjunct**

  Disjunct multiple transducers in input

### Other options:

- **-C**, **--check-negative-epsilon-cycles**

  Issue a warning if there are epsilon cycles with a negative weight in the transducer

If OUTFILE or INFILE is missing or -, standard streams will be used. If FMT is not given, OpenFst's tropical format will be used. The possible values for FMT are { foma, openfst-tropical, openfst-log, sfst, optimized-lookup-weighted, optimized-lookup-unweighted }. If EPS is not given, @0@ will be used.

Space in transition symbols must be escaped as '@\_SPACE\_@' when using att format.

## REPORTING BUGS

Report bugs to \<hfst-bugs@helsinki.fi\> or directly to our bug tracker at: \<https://github.com/hfst/hfst/issues\>

hfst-txt2fst home page: \<https://github.com/hfst/hfst/wiki/HfstTxt2Fst\>\
 General help using HFST software: \<https://github.com/hfst/hfst/wiki\>

## COPYRIGHT

Copyright © 2017 University of Helsinki, License GPLv3: GNU GPL version 3 \<http://gnu.org/licenses/gpl.html\>\
 This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.