lucene/modules/analysis/CHANGES.txt

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Analysis Module Change Log
For more information on past and future Lucene versions, please see:
http://s.apache.org/luceneversions
======================= Trunk (not yet released) =======================
API Changes
* LUCENE-2413: Deprecated PatternAnalyzer in common/miscellaneous, in favor
of the pattern package (CharFilter, Tokenizer, TokenFilter). (Robert Muir)
* LUCENE-2413: Removed the AnalyzerUtil in common/miscellaneous. (Robert Muir)
* LUCENE-2167,LUCENE-2699,LUCENE-2763,LUCENE-2847: StandardTokenizer/Analyzer
in common/standard/ now implement the Word Break rules from the Unicode 6.0.0
Text Segmentation algorithm (UAX#29), covering the full range of Unicode code
points, including values from U+FFFF to U+10FFFF
ClassicTokenizer/Analyzer retains the old (pre-Lucene 3.1) StandardTokenizer/
Analyzer implementation and behavior. Only the Unicode Basic Multilingual
Plane (code points from U+0000 to U+FFFF) is covered.
UAX29URLEmailTokenizer tokenizes URLs and E-mail addresses according to the
relevant RFCs, in addition to implementing the UAX#29 Word Break rules.
(Steven Rowe, Robert Muir, Uwe Schindler)
* LUCENE-1370: Added ShingleFilter option to output unigrams if no shingles
can be generated. (Chris Harris via Steven Rowe)
* LUCENE-2514, LUCENE-2551: JDK and ICU CollationKeyAnalyzers were changed to
use pure byte keys when Version >= 4.0. This cuts sort key size approximately
in half. (Robert Muir)
New Features
* LUCENE-2413: Consolidated Solr analysis components into common.
New features from Solr now available to Lucene users include:
- o.a.l.analysis.commongrams: Constructs n-grams for frequently occurring terms
and phrases.
- o.a.l.analysis.charfilter.HTMLStripCharFilter: CharFilter that strips HTML
constructs.
- o.a.l.analysis.miscellaneous.WordDelimiterFilter: TokenFilter that splits words
into subwords and performs optional transformations on subword groups.
- o.a.l.analysis.miscellaneous.RemoveDuplicatesTokenFilter: TokenFilter which
filters out Tokens at the same position and Term text as the previous token.
- o.a.l.analysis.miscellaneous.TrimFilter: Trims leading and trailing whitespace
from Tokens in the stream.
- o.a.l.analysis.miscellaneous.KeepWordFilter: A TokenFilter that only keeps tokens
with text contained in the required words (inverse of StopFilter).
- o.a.l.analysis.miscellaneous.HyphenatedWordsFilter: A TokenFilter that puts
hyphenated words broken into two lines back together.
- o.a.l.analysis.miscellaneous.CapitalizationFilter: A TokenFilter that applies
capitalization rules to tokens.
- o.a.l.analysis.pattern: Package for pattern-based analysis, containing a
CharFilter, Tokenizer, and Tokenfilter for transforming text with regexes.
- o.a.l.analysis.synonym.SynonymFilter: A synonym filter that supports multi-word
synonyms.
- o.a.l.analysis.phonetic: Package for phonetic search, containing various
phonetic encoders such as Double Metaphone.
* LUCENE-2413: Consolidated all Lucene analyzers into common.
- o.a.l.analysis.KeywordAnalyzer -> o.a.l.analysis.core.KeywordAnalyzer
- o.a.l.analysis.KeywordTokenizer -> o.a.l.analysis.core.KeywordTokenizer
- o.a.l.analysis.LetterTokenizer -> o.a.l.analysis.core.LetterTokenizer
- o.a.l.analysis.LowerCaseFilter -> o.a.l.analysis.core.LowerCaseFilter
- o.a.l.analysis.LowerCaseTokenizer -> o.a.l.analysis.core.LowerCaseTokenizer
- o.a.l.analysis.SimpleAnalyzer -> o.a.l.analysis.core.SimpleAnalyzer
- o.a.l.analysis.StopAnalyzer -> o.a.l.analysis.core.StopAnalyzer
- o.a.l.analysis.StopFilter -> o.a.l.analysis.core.StopFilter
- o.a.l.analysis.WhitespaceAnalyzer -> o.a.l.analysis.core.WhitespaceAnalyzer
- o.a.l.analysis.WhitespaceTokenizer -> o.a.l.analysis.core.WhitespaceTokenizer
- o.a.l.analysis.PorterStemFilter -> o.a.l.analysis.en.PorterStemFilter
- o.a.l.analysis.ASCIIFoldingFilter -> o.a.l.analysis.miscellaneous.ASCIIFoldingFilter
- o.a.l.analysis.ISOLatin1AccentFilter -> o.a.l.analysis.miscellaneous.ISOLatin1AccentFilter
- o.a.l.analysis.KeywordMarkerFilter -> o.a.l.analysis.miscellaneous.KeywordMarkerFilter
- o.a.l.analysis.LengthFilter -> o.a.l.analysis.miscellaneous.LengthFilter
- o.a.l.analysis.PerFieldAnalyzerWrapper -> o.a.l.analysis.miscellaneous.PerFieldAnalyzerWrapper
- o.a.l.analysis.TeeSinkTokenFilter -> o.a.l.analysis.sinks.TeeSinkTokenFilter
- o.a.l.analysis.CharFilter -> o.a.l.analysis.charfilter.CharFilter
- o.a.l.analysis.BaseCharFilter -> o.a.l.analysis.charfilter.BaseCharFilter
- o.a.l.analysis.MappingCharFilter -> o.a.l.analysis.charfilter.MappingCharFilter
- o.a.l.analysis.NormalizeCharMap -> o.a.l.analysis.charfilter.NormalizeCharMap
- o.a.l.analysis.CharArraySet -> o.a.l.analysis.util.CharArraySet
- o.a.l.analysis.CharArrayMap -> o.a.l.analysis.util.CharArrayMap
- o.a.l.analysis.ReusableAnalyzerBase -> o.a.l.analysis.util.ReusableAnalyzerBase
- o.a.l.analysis.StopwordAnalyzerBase -> o.a.l.analysis.util.StopwordAnalyzerBase
- o.a.l.analysis.WordListLoader -> o.a.l.analysis.util.WordListLoader
- o.a.l.analysis.CharTokenizer -> o.a.l.analysis.util.CharTokenizer
- o.a.l.util.CharacterUtils -> o.a.l.analysis.util.CharacterUtils
* SOLR-1057: Add PathHierarchyTokenizer that represents file path hierarchies as synonyms of
/something, /something/something, /something/something/else. (Ryan McKinley, Koji Sekiguchi)
Build
* LUCENE-2413: All analyzers in contrib/analyzers and contrib/icu were moved to the
analysis module. The 'smartcn' and 'stempel' components now depend on 'common'.
(Robert Muir)