Korean analysis plugin that integrates open-korean-text module into elasticsearch.
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README.md

elasticsearch-analysis-openkoreantext

Build Status

한국어(한글)를 처리하는 Elasticsearch analyzer입니다. open-korean-text 한국어 처리엔진으로 작성되었습니다.

Korean analysis plugin that integrates open-korean-text module into Elasticsearch.

Elasticsearch 4.x 이하의 버전은 지원하지 않습니다.

Install

$ cd ${ES_HOME}
$ bin/elasticsearch-plugin install {download URL}

설치 후 bin/elasticsearch 실행 시, loaded plugin [elasticsearch-analysis-openkoreantext] 라는 로그가 출력되는지 확인합니다.

download URL 은 아래 Compatible Versions를 참고하여 Elasticsearch 버젼에 맞는 Plugin 버젼을 다운로드 받아야합니다.

Example

Input

curl -X POST 'http://localhost:9200/_analyze' -d '{
  "analyzer": "openkoreantext-analyzer",
  "text": "한국어를 처리하는 예시입니닼ㅋㅋ"
}'

Output

{
  "tokens": [
    {
      "token": "한국어",
      "start_offset": 0,
      "end_offset": 3,
      "type": "Noun",
      "position": 0
    },
    {
      "token": "처리",
      "start_offset": 5,
      "end_offset": 7,
      "type": "Noun",
      "position": 1
    },
    {
      "token": "하다",
      "start_offset": 7,
      "end_offset": 9,
      "type": "Verb",
      "position": 2
    },
    {
      "token": "예시",
      "start_offset": 10,
      "end_offset": 12,
      "type": "Noun",
      "position": 3
    },
    {
      "token": "이다",
      "start_offset": 12,
      "end_offset": 15,
      "type": "Adjective",
      "position": 4
    },
    {
      "token": "ㅋㅋ",
      "start_offset": 15,
      "end_offset": 17,
      "type": "KoreanParticle",
      "position": 5
    }
  ]
}

Elasticsearch의 default analyzer를 사용했을 경우

{
  "tokens": [
    {
      "token": "한국어를",
      "start_offset": 0,
      "end_offset": 4,
      "type": "<HANGUL>",
      "position": 0
    },
    {
      "token": "처리하는",
      "start_offset": 5,
      "end_offset": 9,
      "type": "<HANGUL>",
      "position": 1
    },
    {
      "token": "예시입니닼ㅋㅋ",
      "start_offset": 10,
      "end_offset": 17,
      "type": "<HANGUL>",
      "position": 2
    }
  ]
}

실제 사용 방법은 Elasicsearch analysis를 참고하세요.

User Dictionary

기본사전 이외에 사용자가 원하는 단어를 추가하여 사용할 수 있습니다. 예를들어 말썽쟁이를 분석하면 말썽(Noun)쟁이(suffix)로 추출되지만, 사전에 말썽쟁이를 추가하면 말썽쟁이(Noun)로 추출할 수 있습니다.

Analyzer Plugin을 설치하면 {ES_HOME}/plugins/elasticserach-analysis-openkoreantext 위치에 dic/ 디렉토리를 찾을 수 있습니다. 해당 디렉토리 안에 사전 텍스트 파일을 추가하면 됩니다.

사전 텍스트 파일은 각 단어들을 줄바꿈하여 넣으면 됩니다. (단, 띄워쓰기는 단어로 인식하지 않습니다.)

# {ES_HOME}/plugins/elasticserach-analysis-openkoreantext/dic/sampledictionary
말썽쟁이
뚜쟁이
욕쟁이할머니
...

Components

이 Analyzer는 몇 가지 components로 구성되어 있습니다.

Charater Filter

  • openkoreantext-normalizer
    • 구어체를 표준화 합니다.

    훌쩍훌쩍훌쩍훌쩍 -> 훌쩍훌쩍, 하겟다 -> 하겠다, 안됔ㅋㅋㅋ -> 안돼ㅋㅋ

Tokenizer

  • openkoreantext-tokenizer
    • 문장을 토큰화 합니다.

    한국어를 처리하는 예시입니다 ㅋㅋ -> [한국어, 를, 처리, 하는, 예시, 입니다, ㅋㅋ]

Token Filter

  • openkoreantext-stemmer  * 형용사와 동사를 스테밍합니다.

    새로운 스테밍을 추가했었다. -> [새롭다, 스테밍, 을, 추가하다, .]

  • openkoreantext-redundant-filter

    • 접속사, 공백(띄워쓰기), 조사, 마침표 등을 제거합니다.

    그리고 이것은 예시, 또는 예로써, 한국어를 처리하기 -> [예시, 예, 한국어, 처리, 하다]

  • openkoreantext-phrase-extractor

    • 어구를 추출합니다.

    한국어를 처리하는 예시입니다 ㅋㅋ -> [한국어, 처리, 예시, 처리하는 예시]

Analyzer

[openkoreantext-normalizer] -> [openkoreantext-tokenizer] -> [openkoreantext-stemmer, openkoreantext-redundant-filter, classic, length, lowercase]

  • 이 analyzer에는 openkoreantext-phrase-extractor가 기본 token filter로 적용되어있지 않습니다.
  • custom analyzer 구성을 원하시면 custom analyzer를 참고하세요.

Compatible Versions

Elasticsearch open-korean-text Download URL
6.1.1 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/6.1.1/elasticsearch-analysis-openkoreantext-6.1.1.2-plugin.zip
6.1.0 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/6.1.1/elasticsearch-analysis-openkoreantext-6.1.0.2-plugin.zip
6.0.0 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/6.0.0.2/elasticsearch-analysis-openkoreantext-6.0.0.2-plugin.zip
5.6.5 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/6.1.1/elasticsearch-analysis-openkoreantext-5.6.5.2-plugin.zip
5.6.4 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.6.4.2/elasticsearch-analysis-openkoreantext-5.6.4.2-plugin.zip
5.6.3 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.6.4.2/elasticsearch-analysis-openkoreantext-5.6.3.2-plugin.zip
5.6.2 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/v5.6.x/elasticsearch-analysis-openkoreantext-5.6.2.2-plugin.zip
5.6.1 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/v5.6.x/elasticsearch-analysis-openkoreantext-5.6.1.2-plugin.zip
5.6.0 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/v5.6.x/elasticsearch-analysis-openkoreantext-5.6.0.2-plugin.zip
5.5.2 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.5.2.2/elasticsearch-analysis-openkoreantext-5.5.2.2-plugin.zip
5.5.1 2.1.0 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.5.1.2.1/elasticsearch-analysis-openkoreantext-5.5.1.2-plugin.zip
5.5.0 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.5.0.2/elasticsearch-analysis-openkoreantext-5.5.0.2-plugin.zip
5.4.3 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.2.2/elasticsearch-analysis-openkoreantext-5.4.3.2-plugin.zip
5.4.2 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.2.2/elasticsearch-analysis-openkoreantext-5.4.2.2-plugin.zip
5.4.1 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.1.2/elasticsearch-analysis-openkoreantext-5.4.1.2-plugin.zip
5.4.0 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.4.0.2-plugin.zip
5.3.2 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.3.2.2-plugin.zip
5.3.1 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.3.1.2-plugin.zip
5.3.0 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.3.0.2-plugin.zip
5.2.2 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.2.2.2-plugin.zip
5.2.1 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.2.1.2-plugin.zip
5.1.2 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.1.2.2-plugin.zip
5.1.1 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.1.1.2-plugin.zip
5.1.0 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.1.0.2-plugin.zip
5.0.2 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.0.2.2-plugin.zip
5.0.1 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.0.1.2-plugin.zip
5.0.0 2.0.1 https://github.com/open-korean-text/elasticsearch-analysis-openkoreantext/releases/download/5.4.0.2/elasticsearch-analysis-openkoreantext-5.0.0.2-plugin.zip

License

Licensed under the Apache License, Version 2.0: http://www.apache.org/licenses/LICENSE-2.0