OpenSearch/docs/reference/analysis/analyzers/configuring.asciidoc

[[configuring-analyzers]]
=== Configuring built-in analyzers

The built-in analyzers can be used directly without any configuration.  Some
of them, however, support configuration options to alter their behaviour.  For
instance, the <<analysis-standard-analyzer,`standard` analyzer>> can be configured
to support a list of stop words:

[source,console]
--------------------------------
PUT my-index-000001
{
  "settings": {
    "analysis": {
      "analyzer": {
        "std_english": { <1>
          "type":      "standard",
          "stopwords": "_english_"
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "my_text": {
        "type":     "text",
        "analyzer": "standard", <2>
        "fields": {
          "english": {
            "type":     "text",
            "analyzer": "std_english" <3>
          }
        }
      }
    }
  }
}

POST my-index-000001/_analyze
{
  "field": "my_text", <2>
  "text": "The old brown cow"
}

POST my-index-000001/_analyze
{
  "field": "my_text.english", <3>
  "text": "The old brown cow"
}

--------------------------------

<1> We define the `std_english` analyzer to be based on the `standard`
    analyzer, but configured to remove the pre-defined list of English stopwords.
<2> The `my_text` field uses the `standard` analyzer directly, without
    any configuration.  No stop words will be removed from this field.
    The resulting terms are: `[ the, old, brown, cow ]`
<3> The `my_text.english` field uses the `std_english` analyzer, so
    English stop words will be removed.  The resulting terms are:
    `[ old, brown, cow ]`


/////////////////////

[source,console-result]
----------------------------
{
  "tokens": [
    {
      "token": "old",
      "start_offset": 4,
      "end_offset": 7,
      "type": "<ALPHANUM>",
      "position": 1
    },
    {
      "token": "brown",
      "start_offset": 8,
      "end_offset": 13,
      "type": "<ALPHANUM>",
      "position": 2
    },
    {
      "token": "cow",
      "start_offset": 14,
      "end_offset": 17,
      "type": "<ALPHANUM>",
      "position": 3
    }
  ]
}
----------------------------

/////////////////////