The Apache OpenNLP team is pleased to announce the release of version 1.8.0 of Apache OpenNLP.
The Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text.
It supports the most common NLP tasks, such as tokenization, sentence segmentation, part-of-speech tagging, named entity extraction, chunking, parsing, and coreference resolution.
The OpenNLP 1.8.0 binary and source distributions are available for download from our download page.
The OpenNLP library is distributed by Maven Central as well. See the Maven Dependency page for more details.
Java 1.8 is required to run OpenNLP Maven 3.3.9 is required for building it building from the Source Distribution.
To build everything execute the following command in the root folder:
mvn clean install
The results of the build will be placed in:
This release introduces many new features, improvements and bug fixes. The API has been improved for a better consistency and many deprecated methods were removed. Java 1.8 is required.
Additionally the release contains the following noteworthy changes:
POS Tagger context generator now supports feature generation XML
Add a Name Finder feature generator that adds POS Tag features
Add CONLL-U format support
Improve default Name Finder settings
TokenNameFinderEvaluator CLI now support nameTypes argument
Stupid backoff is now the default in NGramLanguageModel
Language codes now are ISO 639-3 compliant
Add many unit tests
Distribution package now includes example parameters file
Now prefix and suffix feature generators are configurable
Remove API in Document Categorizer for user specified tokenizer
Learnable lemmatizer now returns all possible lemmas for a given word and pos tag
Lemmatizer API backward compatibility break: no need to encode/decode lemmas anymore, now LemmatizerME lemmatize method returns the actual lemma
Add stemmer, detokenizer and sentence detection abbreviations for Irish
Chunker SequenceValidator signature changed to allow access to both token and POS tag
A detailed list of the issues related to this release can be found in the release notes.
Thanks again to all contributors and committers for their help.
--The Apache OpenNLP Team
19 May 2017