opennlp.tools.chunker

Interface Chunker

All Known Implementing Classes:

ChunkerME

public interface Chunker

The interface for chunkers which provide chunk tags for a sequence of tokens.

Method Summary

Modifier and Type	Method and Description
String[]	chunk(String[] toks, String[] tags) Generates chunk tags for the given sequence returning the result in an array.
Span[]	chunkAsSpans(String[] toks, String[] tags) Generates tagged chunk spans for the given sequence returning the result in a span array.
Sequence[]	topKSequences(String[] sentence, String[] tags) Returns the top k chunk sequences for the specified sentence with the specified pos-tags
Sequence[]	topKSequences(String[] sentence, String[] tags, double minSequenceScore) Returns the top k chunk sequences for the specified sentence with the specified pos-tags

Method Detail

chunk

String[] chunk(String[] toks,
               String[] tags)

Generates chunk tags for the given sequence returning the result in an array.

Parameters:

toks - an array of the tokens or words of the sequence.

tags - an array of the pos tags of the sequence.

Returns:

an array of chunk tags for each token in the sequence.

chunkAsSpans

Span[] chunkAsSpans(String[] toks,
                    String[] tags)

Generates tagged chunk spans for the given sequence returning the result in a span array.

Parameters:

toks - an array of the tokens or words of the sequence.

tags - an array of the pos tags of the sequence.

Returns:

an array of spans with chunk tags for each chunk in the sequence.

topKSequences

Sequence[] topKSequences(String[] sentence,
                         String[] tags)

Returns the top k chunk sequences for the specified sentence with the specified pos-tags

Parameters:

sentence - The tokens of the sentence.

tags - The pos-tags for the specified sentence.

Returns:

the top k chunk sequences for the specified sentence.

topKSequences

Sequence[] topKSequences(String[] sentence,
                         String[] tags,
                         double minSequenceScore)

Returns the top k chunk sequences for the specified sentence with the specified pos-tags

Parameters:

sentence - The tokens of the sentence.

tags - The pos-tags for the specified sentence.

minSequenceScore - A lower bound on the score of a returned sequence.

Returns:

the top k chunk sequences for the specified sentence.