Standard analyzer

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.

response = client.indices.analyze(
  body: {
    analyzer: 'standard',
    text: "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
  }
)
puts response

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 ]

The standard analyzer accepts the following parameters:

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

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-000001
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_english_analyzer": {
          "type": "standard",
          "max_token_length": 5,
          "stopwords": "_english_"
        }
      }
    }
  }
}

POST my-index-000001/_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 ]

The standard analyzer consists of:

If you need to customize the standard analyzer beyond the configuration parameters then you need to recreate it as a custom analyzer and modify it, usually by adding token filters. This would recreate the built-in standard analyzer and you can use it as a starting point:

response = client.indices.create(
  index: 'standard_example',
  body: {
    settings: {
      analysis: {
        analyzer: {
          rebuilt_standard: {
            tokenizer: 'standard',
            filter: [
              'lowercase'
            ]
          }
        }
      }
    }
  }
)
puts response

PUT /standard_example
{
  "settings": {
    "analysis": {
      "analyzer": {
        "rebuilt_standard": {
          "tokenizer": "standard",
          "filter": [
            "lowercase"       
          ]
        }
      }
    }
  }
}