elasticsearch/docs/reference/data-analysis/text-analysis/analysis-lowercase-tokenizer.md
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Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com>
Co-authored-by: Liam Thompson <leemthompo@gmail.com>
Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com>
Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com>
2025-02-27 17:56:14 +01:00

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navigation_title mapped_pages
Lowercase
https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-lowercase-tokenizer.html

Lowercase tokenizer [analysis-lowercase-tokenizer]

The lowercase tokenizer, like the letter tokenizer breaks text into terms whenever it encounters a character which is not a letter, but it also lowercases all terms. It is functionally equivalent to the letter tokenizer combined with the lowercase token filter, but is more efficient as it performs both steps in a single pass.

Example output [_example_output_12]

POST _analyze
{
  "tokenizer": "lowercase",
  "text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}

The above sentence would produce the following terms:

[ the, quick, brown, foxes, jumped, over, the, lazy, dog, s, bone ]

Configuration [_configuration_13]

The lowercase tokenizer is not configurable.