web5design / nlptools

A toolkit that wraps various natural language processing implementations behind a common interface.

UW NLPTools

This is a collection of natural language processing tools wrapped behind common interfaces. The client can easily use the wrapped libraries through elegant scala interfaces. It's also a breeze to switch implementations of a particular tool since all implementations of a particular tool extend a common trait.

This toolkit also aims to minimize the size of transitive dependencies. Each tool is broken into its own component so you can choose what you want to use through dependency management. Each component contains the requisite modules but no more, saving you from needing to search for models while also protecting you from a dependencies that are hundreds of megabytes in order to contain every possible model. If you want to avoid the default models, that's OK too. They are a transitive dependency of the tool so you can exclude them within your dependency manager.

Licensing can be a nightmare. Each tool is split into its own component with the most permissive license allowable by the dependencies. Licenses are all clearly stated in the LICENSE file of the subcomponent.

The largest NLP components are OpenNLP toolkit (Apache 2.0) and Stanford CoreNLP (GPL 2.0).

The interfaces are defined in the core component.

Components

Stemmers

• Morpha
• Snowball
  • Porter
  • Porter2
  • Lovins

Tokenizers

• OpenNLP
• Stanford

Part-of-Speech (POS) Taggers

• OpenNLP
• Stanford

Chunkers

• OpenNLP

Constituency Parsers

• OpenNLP
• Stanford

Dependency Parsers

• MaltParser
• Stanford

Coreference

• Stanford

Sentence Segmentation (sentencer)

• OpenNLP
• Piao

Usage

Each component is usable through a java interface as well as on the command line. For example:

echo 'You are a fool to believe that!' | mvn exec:java -Dexec.mainClass=edu.washington.cs.knowitall.tool.parse.StanfordParse

Contributors

• Michael Schmitz http://www.schmitztech.com/