IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elasticsearch Guide [5.3] ›Mapping ›Meta-Fields

_meta field

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_meta field

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Each mapping type can have custom meta data associated with it. These are not used at all by Elasticsearch, but can be used to store application-specific metadata, such as the class that a document belongs to:

PUT my_index
{
  "mappings": {
    "user": {
      "_meta": { 
        "class": "MyApp::User",
        "version": {
          "min": "1.0",
          "max": "1.3"
        }
      }
    }
  }
}

This _meta info can be retrieved with the GET mapping API.

The _meta field can be updated on an existing type using the PUT mapping API.

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