Class OpenNLPLemmatizerFilter

Runs OpenNLP dictionary-based and/or MaxEnt lemmatizers.

Both a dictionary-based lemmatizer and a MaxEnt lemmatizer are supported, via the "dictionary" and "lemmatizerModel" params, respectively. If both are configured, the dictionary-based lemmatizer is tried first, and then the MaxEnt lemmatizer is consulted for out-of-vocabulary tokens.

The dictionary file must be encoded as UTF-8, with one entry per line, in the form word[tab]lemma[tab]part-of-speech

Inheritance
System.Object
AttributeSource
TokenStream
TokenFilter
OpenNLPLemmatizerFilter
Implements
IDisposable
Inherited Members
Namespace: Lucene.Net.Analysis.OpenNlp
Assembly: Lucene.Net.Analysis.OpenNLP.dll
Syntax
public class OpenNLPLemmatizerFilter : TokenFilter, IDisposable

Constructors

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OpenNLPLemmatizerFilter(TokenStream, NLPLemmatizerOp)

Declaration
public OpenNLPLemmatizerFilter(TokenStream input, NLPLemmatizerOp lemmatizerOp)
Parameters
Type Name Description
TokenStream input
NLPLemmatizerOp lemmatizerOp

Methods

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IncrementToken()

Declaration
public override sealed bool IncrementToken()
Returns
Type Description
System.Boolean
Overrides
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Reset()

Declaration
public override void Reset()
Overrides

Implements

IDisposable