导读 Apache OpenNLP 1.8.0 发布了，OpenNLP 是一个机器学习工具包，用于处理自然语言文本。支持大多数常用的 NLP 任务，例如：标识化、句子切分、部分词性标注、名称抽取、组块、解析等。

此版本带来了许多新功能、改进和错误修复。API 已经得到改进以获得更好的一致性，并且删除了许多不被赞同的方法。

更新如下：

  • 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

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