Package org.apache.lucene.analysis.standard

Fast, general-purpose grammar-based tokenizers.

The org.apache.lucene.analysis.standard package contains three fast grammar-based tokenizers constructed with JFlex:

• StandardTokenizer: as of Lucene 3.1, implements the Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29. Unlike UAX29URLEmailTokenizer, URLs and email addresses are not tokenized as single tokens, but are instead split up into tokens according to the UAX#29 word break rules.
  StandardAnalyzer includes StandardTokenizer, StandardFilter, LowerCaseFilter and StopFilter. When the Version specified in the constructor is lower than 3.1, the ClassicTokenizer implementation is invoked.
• 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, StandardFilter, LowerCaseFilter and StopFilter.
• UAX29URLEmailTokenizer: implements the 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.
  UAX29URLEmailAnalyzer includes UAX29URLEmailTokenizer, StandardFilter, LowerCaseFilter and StopFilter.

Interface Summary

Interface	Description
StandardTokenizerInterface	Internal interface for supporting versioned grammars.

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.
StandardAnalyzer	Filters StandardTokenizer with StandardFilter, LowerCaseFilter and StopFilter, using a list of English stop words.
StandardFilter	Normalizes tokens extracted with StandardTokenizer.
StandardFilterFactory	Factory for StandardFilter.
StandardTokenizer	A grammar-based tokenizer constructed with JFlex.
StandardTokenizerFactory	Factory for StandardTokenizer.
StandardTokenizerImpl	This class implements Word Break rules from the Unicode Text Segmentation algorithm, as specified in Unicode Standard Annex #29.
UAX29URLEmailAnalyzer	Filters UAX29URLEmailTokenizer with StandardFilter, 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.