elasticsearch/docs/reference/text-analysis/analysis-lowercase-tokenizer.md
Colleen McGinnis 9bcd59596d
[docs] Prepare for docs-assembler (#125118)
* reorg files for docs-assembler and create toc.yml files

* fix build error, add redirects

* only toc

* move images
2025-03-20 12:09:12 -05:00

1.1 KiB

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.