pdtexpand(1)

💅 pdtexpand — the manual page, but make it cute

okay so bestie, you found your way to pdtexpand(1), a User Commands page, and honestly? pop off. let's get into it 💖

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✨ NAME ✨

pdtexpand — expand a PDT as an FST 🦋

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🎀 SYNOPSIS 🎀

pdtexpand [OPTIONS] in.pdt [out.fst]

like. that's it. that's the whole vibe check.

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🌸 DESCRIPTION 🌸

It expands a (bounded-stack) PDT as an FST. periodt. 💅

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👑 OPTIONS 👑

okay so first the lore: Boolean options accept either true or false as a value, or the implicit value true if neither value is specified. yes bestie, --connect with nothing after it is just --connect=true. slay.

• --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 PDT parentheses in the result. Default: false.
• --pdt_parentheses=STRING — Set the PDT parenthesis label pairs.
• --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: "".

ngl bestie, --fst_error_fatal=true is the default, so if an FST error happens it's fatal. if you flip it to false, the returned objects just get flagged as bad instead of ending you. choose your fighter 🫶

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🦋 SEE ALSO 🦋

pdtcompose(1), pdtinfo(1), pdtreplace(1), pdtreverse(1), pdtshortestpath(1)

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and that's the whole page, bestie, you ate. this was OpenFst 1.8.5, dated Mar 2026 — iconic behavior, no cap 💜🌈✨