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« Configuring built-in analyzers Simple Analyzer »

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Standard Analyzer

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Standard Analyzer

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The standard analyzer is the default analyzer which is used if none is specified. It provides grammar based tokenization (based on the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29) and works well for most languages.

Definition

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It consists of:

Tokenizer

Standard Tokenizer

Token Filters

Example output

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POST _analyze
{
  "analyzer": "standard",
  "text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}

The above sentence would produce the following terms:

[ the, 2, quick, brown, foxes, jumped, over, the, lazy, dog's, bone ]

Configuration

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The standard analyzer accepts the following parameters:

`max_token_length`	The maximum token length. If a token is seen that exceeds this length then it is split at `max_token_length` intervals. Defaults to `255`.
`stopwords`	A pre-defined stop words list like `_english_` or an array containing a list of stop words. Defaults to `\_none_`.
`stopwords_path`	The path to a file containing stop words.

See the Stop Token Filter for more information about stop word configuration.

Example configuration

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In this example, we configure the standard analyzer to have a max_token_length of 5 (for demonstration purposes), and to use the pre-defined list of English stop words:

PUT my_index
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_english_analyzer": {
          "type": "standard",
          "max_token_length": 5,
          "stopwords": "_english_"
        }
      }
    }
  }
}

POST my_index/_analyze
{
  "analyzer": "my_english_analyzer",
  "text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}

The above example produces the following terms:

[ 2, quick, brown, foxes, jumpe, d, over, lazy, dog's, bone ]

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