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Apache OpenNLP 1.8.1 released

The Apache OpenNLP team is pleased to announce the release of version 1.8.1 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 1.8.1 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: opennlp-distr/target/apache-opennlp-1.8.1-bin.tar.gz (or .zip)

What’s new in Apache OpenNLP 1.8.1

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:

  • A new Language Detection Component

  • Support for Irish Sentence Bank formats

  • Support to train the sentence detector and tokenizer on the UD corpus

  • Evaluation tests now support ISO-639-3 language codes

  • Convenience methods to load models from a path

  • Refactored the Data Indexer Code

  • Optimized NGram creation loop to better leverage CPU cache

  • Refactored BratNameSampleStream

  • Remove deprecated code from util package

  • Redesigned web site -

  • New logo for the project

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

08 July 2017