Link Search Menu Expand Document Documentation Menu
Documentation

You're viewing version 2.18 of the OpenSearch documentation. This version is no longer maintained. For the latest version, see the current documentation. For information about OpenSearch version maintenance, see Release Schedule and Maintenance Policy.

Basque analyzer

The built-in basque analyzer can be applied to a text field using the following command:

PUT /basque-index
{
  "mappings": {
    "properties": {
      "content": {
        "type": "text",
        "analyzer": "basque"
      }
    }
  }
}

Stem exclusion

You can use stem_exclusion with this language analyzer using the following command:

PUT index_with_stem_exclusion_basque_analyzer
{
  "settings": {
    "analysis": {
      "analyzer": {
        "stem_exclusion_basque_analyzer": {
          "type": "basque",
          "stem_exclusion": ["autoritate", "baldintza"]
        }
      }
    }
  }
}

Basque analyzer internals

The basque analyzer is built using the following components:

  • Tokenizer: standard

  • Token filters:

    • lowercase
    • stop (Basque)
    • keyword
    • stemmer (Basque)

Custom Basque analyzer

You can create a custom Basque analyzer using the following command:

PUT /basque-index
{
  "settings": {
    "analysis": {
      "filter": {
        "basque_stop": {
          "type": "stop",
          "stopwords": "_basque_"
        },
        "basque_stemmer": {
          "type": "stemmer",
          "language": "basque"
        },
        "basque_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] 
        }
      },
      "analyzer": {
        "basque_analyzer": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "basque_stop",
            "basque_keywords",
            "basque_stemmer"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "content": {
        "type": "text",
        "analyzer": "basque_analyzer"
      }
    }
  }
}

Generated tokens

Use the following request to examine the tokens generated using the analyzer:

POST /basque-index/_analyze
{
  "field": "content",
  "text": "Ikasleek euskal unibertsitateetan ikasten dute. Haien zenbakiak 123456 dira."
}

The response contains the generated tokens:

{
  "tokens": [
    {"token": "ikasle","start_offset": 0,"end_offset": 8,"type": "<ALPHANUM>","position": 0},
    {"token": "euskal","start_offset": 9,"end_offset": 15,"type": "<ALPHANUM>","position": 1},
    {"token": "unibertsi","start_offset": 16,"end_offset": 33,"type": "<ALPHANUM>","position": 2},
    {"token": "ikas","start_offset": 34,"end_offset": 41,"type": "<ALPHANUM>","position": 3},
    {"token": "haien","start_offset": 48,"end_offset": 53,"type": "<ALPHANUM>","position": 5},
    {"token": "zenba","start_offset": 54,"end_offset": 63,"type": "<ALPHANUM>","position": 6},
    {"token": "123456","start_offset": 64,"end_offset": 70,"type": "<NUM>","position": 7}
  ]
}
350 characters left

Have a question? .

Want to contribute? or .