de.jungblut.ner

Interface SequenceFeatureExtractor<K>

All Known Implementing Classes:

BasicFeatureExtractor

public interface SequenceFeatureExtractor<K>

Interface for feature extraction in sequence learning. Can be used with the SparseFeatureExtractorHelper to calculate real vectors to use in a classifier.

Author:

thomas.jungblut

Method Summary

Modifier and Type	Method and Description
List<String>	computeFeatures(List<K> words, int prevLabel, int position) Compute a feature for the given sequence (the complete list words).

Method Detail

computeFeatures

List<String> computeFeatures(List<K> words,
                             int prevLabel,
                             int position)

Compute a feature for the given sequence (the complete list words). Given are the previous label and the current index (position). This method will be called for every index in the list of words.

Parameters:

words - all words in that sequence.

prevLabel - the previous label.

position - the current position.

Returns:

a set of features for this position.