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What is natto?

A gem leveraging FFI (foreign function interface), natto combines the Ruby programming language with MeCab, the part-of-speech and morphological analyzer for the Japanese language.

• natto provides a naturally Ruby-esque interface to MeCab.
• It runs on both CRuby (mri/yarv) and JRuby (jvm).
• It works with MeCab installations on Windows, Unix/Linux and OS X.
• No compiler is necessary, as natto is not a C extension.

Wiki Pages

1. Requirements
2. Installation and Configuration
3. Usage
   1. とりあえず使ってみよう！
   2. わかち書き Parsing
   3. N-Best 読み
   4. 振り仮名変換
   5. 出力フォーマットの指定
   6. 制約付き解析(部分解析)
4. Why Even Bother?

Appendices

Appendix A: API-Documentation

Appendix B: Supported MeCab Options

Appendix C: Node Parsing and stat

Appendix D: Node Parsing and char_type

Appendix E: Node Parsing and IPADIC Part-of-Speech ID

Appendix F: Output Formatting

Appendix G: Building libmecab.dll on 64-bit Windows