---
name: "lt-comp"
section: "1"
platform: "linux"
package: "lttoolbox-dev"
version: "3.8.0-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/lt-comp"
---

# lt-comp(1)

augmented letter transducer compiler for Apertium

## NAME

**lt-comp** – augmented letter transducer compiler for Apertium

## SYNOPSIS

**lt-comp** \[**-a** \| **-v** \| **-l** \| **-r** \| **-m** \| **-h**\] **lr** \| **rl** *dictionary\_file* *output\_file* \[*acx\_file*\]

## DESCRIPTION

**lt-comp** is the application responsible for compiling dictionaries used by [lt-proc(1)](/lt-proc/1.md) in Apertium into a compact and efficient representation (a class of finite-state transducers called augmented letter transducers).

## OPTIONS

- **-a**, **-****-alt**

  Sets the value of the **alt** attribute to use in compilation.

  Note that if no value is set, all entries containing an *alt* attribute are omitted.

- **-v**, **-****-var**

  Sets the value of the **v** attribute to use in compilation. This should only be used with monodixes; for bidixes, see **-l** and **-r**.

  Note that if no value is set, all entries containing a **v** attribute are considered to be *left-to-right*.

- **-l**, **-****-var-left**

  Sets the value of the **vl** attribute for use in compilation of bidixes. “Left” here refers to the side of the dictionary, so this option is only valid in **rl** mode.

- **-r**, **-****-var-right**

  Sets the value of the **vr** attribute for use in compilation of bidixes. “Right” here refers to the side of the dictionary, so this option is only valid in **lr** mode.

- **-m**, **-****-keep-boundaries**

  Keep any morpheme boundaries defined by the '\<m/\>' symbol

- **-H**, **-****-hfst**

  expect HFST symbols

- **-S**, **-****-no-split**

  don't attempt to split into word and punctuation transducers

- **-j**, **-****-jobs**

  Parallelise minimisation by using one cpu core per section. By default, this also creates a new section after 50.000 entries. You can override this number by setting the environment variable LT\_MAX\_SECTION\_ENTRIES to some number. If set to 0, sections are never split (but kept exactly as in the dix file). You can also set the environment variable LT\_JOBS=true if you always want parallel minimisation even if lt-comp was called without this option.

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

  Prints a short help message.

- **lr**

  The resulting transducer will process dictionary entries *left-to-right*.

- **rl**

  The resulting transducer will process dictionary entries *right-to-left*.

## FILES

- *dictionary\_file*

  The input dictionary.

- *output\_file*

  The compiled dictionary (a finite state transducer).

- *acx\_file*

  Optional XML file of equivalent characters in monodices.

## SEE ALSO

[apertium(1)](/apertium/1.md), [apertium-tagger(1)](/apertium-tagger/1.md), [lt-expand(1)](/lt-expand/1.md), [lt-proc(1)](/lt-proc/1.md)

## COPYRIGHT

Copyright © 2005, 2006 Universitat d'Alacant / Universidad de Alicante. This is free software. You may redistribute copies of it under the terms of *the* *GNU* *General* *Public* *License:* **https://www.gnu.org/licenses/gpl.html**.

## BUGS

Many... lurking in the dark and waiting for you!