スノーボール（Snowball）

スノーボールトークンフィルター

スノーボール生成のステマーを使用して単語をステム化するフィルターです。languageパラメータは、次の利用可能な値でステマーを制御します: Arabic, Armenian, Basque, Catalan, Danish, Dutch, English, Estonian, Finnish, French, German, German2, Hungarian, Italian, Irish, Kp, Lithuanian, Lovins, Norwegian, Porter, Portuguese, Romanian, Russian, Serbian, Spanish, Swedish, Turkish。

例えば:

Python

resp = client.indices.create(
   index="my-index-000001",
   settings={
   "analysis": {
   "analyzer": {
   "my_analyzer": {
   "tokenizer": "standard",
   "filter": [
   "lowercase",
   "my_snow"
   ]
   }
   },
   "filter": {
   "my_snow": {
   "type": "snowball",
   "language": "Lovins"
   }
   }
   }
   },
)
print(resp)

Ruby

response = client.indices.create(
  index: 'my-index-000001',
  body: {
   settings: {
   analysis: {
   analyzer: {
   my_analyzer: {
   tokenizer: 'standard',
   filter: [
   'lowercase',
   'my_snow'
   ]
   }
   },
   filter: {
   my_snow: {
   type: 'snowball',
   language: 'Lovins'
   }
   }
   }
   }
  }
)
puts response

Js

const response = await client.indices.create({
  index: "my-index-000001",
  settings: {
   analysis: {
   analyzer: {
   my_analyzer: {
   tokenizer: "standard",
   filter: ["lowercase", "my_snow"],
   },
   },
   filter: {
   my_snow: {
   type: "snowball",
   language: "Lovins",
   },
   },
   },
  },
});
console.log(response);

コンソール

PUT /my-index-000001
{
  "settings": {
   "analysis": {
   "analyzer": {
   "my_analyzer": {
   "tokenizer": "standard",
   "filter": [ "lowercase", "my_snow" ]
   }
   },
   "filter": {
   "my_snow": {
   "type": "snowball",
   "language": "Lovins"
   }
   }
   }
  }
}