34 lines
1.1 KiB
Markdown
34 lines
1.1 KiB
Markdown
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---
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navigation_title: "Lowercase"
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mapped_pages:
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- https://www.elastic.co/guide/en/elasticsearch/reference/current/analysis-lowercase-tokenizer.html
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---
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# Lowercase tokenizer [analysis-lowercase-tokenizer]
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The `lowercase` tokenizer, like the [`letter` tokenizer](/reference/data-analysis/text-analysis/analysis-letter-tokenizer.md) 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](/reference/data-analysis/text-analysis/analysis-letter-tokenizer.md) combined with the [`lowercase` token filter](/reference/data-analysis/text-analysis/analysis-lowercase-tokenfilter.md), but is more efficient as it performs both steps in a single pass.
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## Example output [_example_output_12]
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```console
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POST _analyze
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{
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"tokenizer": "lowercase",
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"text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
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}
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```
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The above sentence would produce the following terms:
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```text
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[ the, quick, brown, foxes, jumped, over, the, lazy, dog, s, bone ]
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```
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## Configuration [_configuration_13]
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The `lowercase` tokenizer is not configurable.
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