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lt-proc - This application is part of the lexical processing modules and tools ( lttoolbox

This tool is part of the apertium machine translation architecture:


lt-proc [ -a | -b | -o | -c | -d | -e | -g | -n | -p | -s | -t | -v | -h -z -w ] fst_file
[input_file [output_file]]

lt-proc [ --analysis | --bilingual | --surf-bilingual | --case-sensitive | --debugged-gen
| --decompose-nouns | --generation | --non-marked-gen | --tagged-gen | --post-generation |
--sao | --transliteration | --null-flush --dictionary-case --decompose-compounds |
--version | --help ] fst_file [input_file [output_file]]


lt-proc is the application responsible for providing the four lexical processing

· morphological analyser ( option -a )

· lexical transfer ( option -n )

· morphological generator ( option -g )

· post-generator ( option -p )

It accomplishes these tasks by reading binary files containing a compact and efficient
representation of dictionaries (a class of finite-state transducers called augmented
letter transducers). These files are generated by lt-comp(1).

It is worth to mention that some characters (`[', `]', `$', `^', `/', `+') are special
chars used for format and encapsulation. They should be escaped if they have to be used
literally, for instance: `['...`]' are ignored and the format of a linefeed is `^...$'.


-a, --analysis
Tokenizes the text in surface forms (lexical units as they appear in texts) and
delivers, for each surface form, one or more lexical forms consisting of lemma,
lexical category and morphological inflection information. Tokenization is not
straightforward due to the existence, on the one hand, of contractions, and, on the
other hand, of multi-word lexical units. For contractions, the system reads in a
single surface form and delivers the corresponding sequence of lexical forms.
Multi-word surface forms are analysed in a left-to-right, longest-match fashion.
Multi-word surface forms may be invariable (such as a multi-word preposition or
conjunction) or inflected (for example, in es, "echaban de menos", "they missed",
is a form of the imperfect indicative tense of the verb "echar de menos", "to
miss"). Limited support for some kinds of discontinuous multi-word units is also
available. Single-word surface forms analysis produces output like the one in these
examples: "cantar" -> `^cantar/cantar<vblex><inf>$' or `"daba" ->

-b, --bilingual
Does lexical transference, attaching queues of morphological symbols not specified
in the dictionaries. As the analysis mode, supports multiple lexical forms in the
target language for a given lexical form in the source language. Works tipically
with the output of apertium-pretransfer.

-o, --surf-bilingual
As with -b, but takes input from apertium-tagger -p , with surface forms, and if
the lexical form is not found in the bilingual dictionary, it outputs the surface
form of the word.

-c, --case-sensitive
Use the literal case of the incoming characters

-d, --debugged-gen
Morph. generation with all the stuff

-e, --decompose-compounds
Try to treat unknown words as compounds, and decompose them.

-w, --dictionary-case
Use the case information contained in the lexicon, instead of the surface case
(only applied in analysis mode).

-g, --generation
Delivers a target-language surface form for each target-language lexical form, by
suitably inflecting it.

-n, --non-marked-gen
Morphological generation (like -g) but without unknown word marks (asterisk `*').

-b, --tagged-gen
Morphological generation (like -g) but retaining part-of-speech tags.

-p, --post-generation
Performs orthographical operations such as contractions and apostrophations. The
post-generator is usually dormant (just copies the input to the output) until a
special alarm symbol contained in some target-language surface forms wakes it up to
perform a particular string transformation if necessary; then it goes back to

-s, --sao
Input processing is in orthoepikon (previously `sao') annotation system format:

-t, --transliteration
Apply a transliteration dictionary

-z, --null-flush
Flush output on the null character

-v, --version
Display the version number.

-h, --help
Display this help.

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