---
name: "opennlp"
section: "1"
platform: "linux"
package: "opennlp"
version: "2.5.3-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/opennlp"
---

# opennlp(1)

CLI interface to Apache OpenNLP

## NAME

opennlp - CLI interface to Apache OpenNLP

## DESCRIPTION

\[main\] INFO opennlp.tools.cmdline.CLI - OpenNLP 2.5.3. \[main\] INFO opennlp.tools.cmdline.CLI - Usage: opennlp TOOL \[main\] INFO opennlp.tools.cmdline.CLI - where TOOL is one of:

- Doccat

  Learned document categorizer

- DoccatTrainer

  Trainer for the learnable document categorizer

- DoccatEvaluator

  Measures the performance of the Doccat model with the reference data

- DoccatCrossValidator

  K-fold cross validator for the learnable Document Categorizer

- DoccatConverter

  Converts 20newsgroup data format to native OpenNLP format

- LanguageDetector

  Learned language detector

- LanguageDetectorTrainer

  Trainer for the learnable language detector

- LanguageDetectorConverter

  Converts leipzig data format to native OpenNLP format

- LanguageDetectorCrossValidator

  K-fold cross validator for the learnable Language Detector

- LanguageDetectorEvaluator

  Measures the performance of the Language Detector model with the reference data

- DictionaryBuilder

  Builds a new dictionary

- SimpleTokenizer

  Character class tokenizer

- TokenizerME

  Learnable tokenizer

- TokenizerTrainer

  Trainer for the learnable tokenizer

- TokenizerMEEvaluator

  Measures the performance of the learnable tokenizer

- TokenizerCrossValidator

  K-fold cross validator for the learnable tokenizer

- TokenizerConverter

  Converts external data formats (irishsentencebank,ad,pos,masc,conllx,namefinder,parse,conllu) to native OpenNLP format

- DictionaryDetokenizer

  Normalizes tokenized text according to rules defined in a detokenizer dictionary

- SentenceDetector

  Learnable sentence detector

- SentenceDetectorTrainer

  Trainer for the learnable sentence detector

- SentenceDetectorEvaluator

  Measures the performance of the learnable sentence detector

- SentenceDetectorCrossValidator

  K-fold cross validator for the learnable sentence detector

- SentenceDetectorConverter

  Converts external data formats (nkjp,irishsentencebank,ad,pos,masc,conllx,namefinder,parse,moses,conllu,letsmt) to native OpenNLP format

- TokenNameFinder

  Learnable name finder

- TokenNameFinderTrainer

  Trainer for the learnable name finder

- TokenNameFinderEvaluator

  Measures the performance of the NameFinder model with the reference data

- TokenNameFinderCrossValidator

  K-fold cross validator for the learnable Name Finder

- TokenNameFinderConverter

  Converts external data formats (evalita,ad,conll03,bionlp2004,conll02,masc,muc6,ontonotes,brat) to native OpenNLP format

- CensusDictionaryCreator

  Converts 1990 US Census names into a dictionary

- POSTagger

  Learnable part of speech tagger

- POSTaggerTrainer

  Trains a model for the part-of-speech tagger

- POSTaggerEvaluator

  Measures the performance of the POS tagger model with the reference data

- POSTaggerCrossValidator

  K-fold cross validator for the learnable POS tagger

- POSTaggerConverter

  Converts external data formats (ad,masc,conllx,parse,ontonotes,conllu) to native OpenNLP format

- LemmatizerME

  Learnable lemmatizer

- LemmatizerTrainerME

  Trainer for the learnable lemmatizer

- LemmatizerEvaluator

  Measures the performance of the Lemmatizer model with the reference data

- ChunkerME

  Learnable chunker

- ChunkerTrainerME

  Trainer for the learnable chunker

- ChunkerEvaluator

  Measures the performance of the Chunker model with the reference data

- ChunkerCrossValidator

  K-fold cross validator for the chunker

- ChunkerConverter

  Converts ad data format to native OpenNLP format

- Parser

  Performs full syntactic parsing

- ParserTrainer

  Trains the learnable parser

- ParserEvaluator

  Measures the performance of the Parser model with the reference data

- ParserConverter

  Converts external data formats (ontonotes,frenchtreebank) to native OpenNLP format

- BuildModelUpdater

  Trains and updates the build model in a parser model

- CheckModelUpdater

  Trains and updates the check model in a parser model

- TaggerModelReplacer

  Replaces the tagger model in a parser model

- EntityLinker

  Links an entity to an external data set

- NGramLanguageModel

  Gives the probability and most probable next token(s) of a sequence of tokens in a language model

\[main\] INFO opennlp.tools.cmdline.CLI - All tools print help when invoked with help parameter \[main\] INFO opennlp.tools.cmdline.CLI - Example: opennlp SimpleTokenizer help