Alex a0c83c4511 Minor doc changes to clarify mapping index param for string type (#22652)
* Grammatical correction

* Add note for legacy string mapping type

* Update truncate token filter to not mention the keyword tokenizer

The advice predates the existence of the keyword field

Closes #22650
2017-01-17 16:43:11 +01:00

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[[mapping-index]]
=== `index`
The `index` option controls whether field values are indexed. It accepts `true`
or `false`. Fields that are not indexed are not queryable.
NOTE: For the legacy mapping type <<string,`string`>> the `index` option only accepts legacy values `analyzed` (default, treat as full-text field), `not_analyzed` (treat as keyword field) and `no`.