Class SmartChineseAnalyzer

SmartChineseAnalyzer is an analyzer for Chinese or mixed Chinese-English text. The analyzer uses probabilistic knowledge to find the optimal word segmentation for Simplified Chinese text. The text is first broken into sentences, then each sentence is segmented into words.

Segmentation is based upon the Hidden Markov Model. A large training corpus was used to calculate Chinese word frequency probability.

This analyzer requires a dictionary to provide statistical data. SmartChineseAnalyzer has an included dictionary out-of-box.

The included dictionary data is from ICTCLAS1.0. Thanks to ICTCLAS for their hard work, and for contributing the data under the Apache 2 License!

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
System.Object
Lucene.Net.Analysis.Analyzer
SmartChineseAnalyzer
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.Analyzer.Strategy
Lucene.Net.Analysis.Analyzer.Dispose()
Lucene.Net.Analysis.Analyzer.GLOBAL_REUSE_STRATEGY
Lucene.Net.Analysis.Analyzer.PER_FIELD_REUSE_STRATEGY
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Analysis.Cn.Smart
Assembly: Lucene.Net.Analysis.SmartCn.dll
Syntax
public sealed class SmartChineseAnalyzer : Analyzer, IDisposable

Constructors

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SmartChineseAnalyzer(LuceneVersion)

Create a new SmartChineseAnalyzer, using the default stopword list.

Declaration
public SmartChineseAnalyzer(LuceneVersion matchVersion)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
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SmartChineseAnalyzer(LuceneVersion, CharArraySet)

Create a new SmartChineseAnalyzer, using the provided Lucene.Net.Analysis.Util.CharArraySet of stopwords.

Note: the set should include punctuation, unless you want to index punctuation!

Declaration
public SmartChineseAnalyzer(LuceneVersion matchVersion, CharArraySet stopWords)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
Lucene.Net.Analysis.Util.CharArraySet stopWords

Lucene.Net.Analysis.Util.CharArraySet of stopwords to use.
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SmartChineseAnalyzer(LuceneVersion, Boolean)

Create a new SmartChineseAnalyzer, optionally using the default stopword list.

The included default stopword list is simply a list of punctuation. If you do not use this list, punctuation will not be removed from the text!

Declaration
public SmartChineseAnalyzer(LuceneVersion matchVersion, bool useDefaultStopWords)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
System.Boolean useDefaultStopWords

true to use the default stopword list.

Methods

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CreateComponents(String, TextReader)

Declaration
protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
Parameters
Type Name Description
System.String fieldName
System.IO.TextReader reader
Returns
Type Description
Lucene.Net.Analysis.TokenStreamComponents
Overrides
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GetDefaultStopSet()

Returns an unmodifiable instance of the default stop-words set.

Declaration
public static CharArraySet GetDefaultStopSet()
Returns
Type Description
Lucene.Net.Analysis.Util.CharArraySet

An unmodifiable instance of the default stop-words set.

Implements

System.IDisposable