opennlp

Why we included this project

Apache OpenNLP is a Java library for teams that want classic NLP building blocks inside their own JVM codebase rather than behind a hosted API. It handles the usual preprocessing steps, from sentence splitting and tokenization to part-of-speech tagging, named entity extraction, chunking, parsing, coreference resolution, and language detection, all as callable components. A command line tool makes quick experiments easy. You can load pre-built models for many languages or train your own on annotated data, which fits teams that need deterministic, on-premises results. Because the API stays consistent across components, assembling a pipeline is straightforward, and the project ships documentation and annotated data resources alongside the models.