# Package org.apache.lucene.analysis.standard

Fast, general-purpose grammar-based tokenizers.

See: Description

- Class Summary
  Class | Description
  --- | ---
  ClassicAnalyzer | Filters `ClassicTokenizer` with `ClassicFilter`, `LowerCaseFilter` and `StopFilter`, using a list of English stop words.
  ClassicFilter | Normalizes tokens extracted with `ClassicTokenizer`.
  ClassicFilterFactory | Factory for `ClassicFilter`.
  ClassicTokenizer | A grammar-based tokenizer constructed with JFlex
  ClassicTokenizerFactory | Factory for `ClassicTokenizer`.
  StandardTokenizerFactory | Factory for `StandardTokenizer`.
  UAX29URLEmailAnalyzer | Filters `UAX29URLEmailTokenizer` with `LowerCaseFilter` and `StopFilter`, using a list of English stop words.
  UAX29URLEmailTokenizer | This class implements Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29 URLs and email addresses are also tokenized according to the relevant RFCs.
  UAX29URLEmailTokenizerFactory | Factory for `UAX29URLEmailTokenizer`.
  UAX29URLEmailTokenizerImpl | This class implements Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29 URLs and email addresses are also tokenized according to the relevant RFCs.

## Package org.apache.lucene.analysis.standard Description

Fast, general-purpose grammar-based tokenizers.

- `ClassicTokenizer`: this class was formerly (prior to Lucene 3.1) named `StandardTokenizer`. (Its tokenization rules are not based on the Unicode Text Segmentation algorithm.) `ClassicAnalyzer` includes `ClassicTokenizer`, `LowerCaseFilter` and `StopFilter`.
- `UAX29URLEmailTokenizer`: implements the Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29, except URLs and email addresses are also tokenized according to the relevant RFCs.
  `UAX29URLEmailAnalyzer` includes `UAX29URLEmailTokenizer`, `LowerCaseFilter` and `StopFilter`.

This Java package additionally contains `StandardAnalyzer` and `StandardTokenizer`, which are not visible here, because they moved to Lucene Core. The factories for those components (e.g., used in Solr) are still part of this module.

Copyright © 2000-2020 Apache Software Foundation. All Rights Reserved.