---
name: "mpdtexpand"
section: "1"
platform: "linux"
package: "libfst-tools"
version: "1.8.4-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mpdtexpand"
---

# mpdtexpand(1)

expand a MPDT as an FST

## NAME

mpdtexpand - expand a MPDT as an FST

## SYNOPSIS

**mpdtexpand** \[*OPTIONS*\] *in.mpdt* \[*out.fst*\]

## DESCRIPTION

Expands a (bounded-stack) MPDT as an FST.

## OPTIONS

Boolean options accept either *true* or *false* as a value, or the implicit value *true* if neither value is specified.

- **--connect**\[=*BOOLEAN*\]

  Trim output.  Default: true.

- **--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 cache.  Default: true.

- **--fst\_default\_cache\_gc\_limit**=*N*

  Set the cache byte size that triggers garbage collection.  Default: 1048576.

- **--fst\_error\_fatal\[=***BOOLEAN***\]**

  **If true, FST errors are fatal.  Otherwise, returned objects are flagged as bad.** **For example, FSTs are returned with the** *kError* **property set to true, and** **FST weights set so that** *Member()* **returns false.  Default: true.**

- **--fst\_field\_separator=***STRING*

  **Set the characters used as a separator between printed fields.  Default:** **"	 ".**

- **--fst\_read\_mode=***STRING*

  **Set 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*

  **Set the characters enclosing the first weight of a printed composite weight** **(e.g., pair weight, tuple weight, and derived classes) to ensure proper I/O of** **nested composite weights.  Must have size 0 (none) or 2 (open and close** **parenthesis).  Default: no parentheses.**

- **--fst\_weight\_separator=***CHARACTER*

  **Set the character separator between printed composite weights.  Default: comma.**

- **--help\[=***BOOLEAN***\]**

  **Show usage information.  Default: false.**

- **--helpshort\[=***BOOLEAN***\]**

  **Show brief usage information.  Default: false.**

- **--keep\_parentheses\[=***BOOLEAN***\]**

  **Keep MPDT parentheses in the result.  Default: false.**

- **--mpdt\_parentheses=***STRING*

  **Set the MPDT parenthesis label pairs.  Default: empty string.**

- **--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*

  **Set the temporary directory to use.  Default: /tmp.**

- **--v\[=***N***\]**

  **Set the verbosity level.  Default: 0.**

- **--weight=***THRESHOLD*

  **Set the weight threshold.  Default: "".**

## SEE ALSO

*mpdtcompose***(1),** *mpdtinfo***(1),** *mpdtreverse***(1)**