2013-08-28 19:24:34 -04:00
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[[analysis-tokenizers]]
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== Tokenizers
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Tokenizers are used to break a string down into a stream of terms
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or tokens. A simple tokenizer might split the string up into terms
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wherever it encounters whitespace or punctuation.
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Elasticsearch has a number of built in tokenizers which can be
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used to build <<analysis-custom-analyzer,custom analyzers>>.
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include::tokenizers/standard-tokenizer.asciidoc[]
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include::tokenizers/edgengram-tokenizer.asciidoc[]
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include::tokenizers/keyword-tokenizer.asciidoc[]
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include::tokenizers/letter-tokenizer.asciidoc[]
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include::tokenizers/lowercase-tokenizer.asciidoc[]
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include::tokenizers/ngram-tokenizer.asciidoc[]
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include::tokenizers/whitespace-tokenizer.asciidoc[]
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include::tokenizers/pattern-tokenizer.asciidoc[]
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include::tokenizers/uaxurlemail-tokenizer.asciidoc[]
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include::tokenizers/pathhierarchy-tokenizer.asciidoc[]
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Analysis: Add additional Analyzers, Tokenizers, and TokenFilters from Lucene
Add `irish` analyzer
Add `sorani` analyzer (Kurdish)
Add `classic` tokenizer: specific to english text and tries to recognize hostnames, companies, acronyms, etc.
Add `thai` tokenizer: segments thai text into words.
Add `classic` tokenfilter: cleans up acronyms and possessives from classic tokenizer
Add `apostrophe` tokenfilter: removes text after apostrophe and the apostrophe itself
Add `german_normalization` tokenfilter: umlaut/sharp S normalization
Add `hindi_normalization` tokenfilter: accounts for hindi spelling differences
Add `indic_normalization` tokenfilter: accounts for different unicode representations in Indian languages
Add `sorani_normalization` tokenfilter: normalizes kurdish text
Add `scandinavian_normalization` tokenfilter: normalizes Norwegian, Danish, Swedish text
Add `scandinavian_folding` tokenfilter: much more aggressive form of `scandinavian_normalization`
Add additional languages to stemmer tokenfilter: `galician`, `minimal_galician`, `irish`, `sorani`, `light_nynorsk`, `minimal_nynorsk`
Add support access to default Thai stopword set "_thai_"
Fix some bugs and broken links in documentation.
Closes #5935
2014-07-02 14:59:18 -04:00
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include::tokenizers/classic-tokenizer.asciidoc[]
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include::tokenizers/thai-tokenizer.asciidoc[]
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