# Package opennlp.tools.util.featuregen

package opennlp.tools.util.featuregen
This package contains classes for generating sequence features.

- Related Packages
  Package
  Description
  opennlp.tools.util
  Package containing utility data structures and algorithms used by multiple other packages.
- Class
  Description
  AdaptiveFeatureGenerator
  An interface for generating features for name entity identification and for updating document level contexts.
  AdditionalContextFeatureGenerator
  The `AdditionalContextFeatureGenerator` generates the context from the passed in additional context.
  AggregatedFeatureGenerator
  The `AggregatedFeatureGenerator` aggregates a set of `AdaptiveFeatureGenerator`s and calls them to generate the features.
  AggregatedFeatureGeneratorFactory
  BigramNameFeatureGenerator
  BigramNameFeatureGeneratorFactory
  BrownBigramFeatureGenerator
  Generates Brown cluster features for token bigrams.
  BrownCluster
  Class to load a Brown cluster document: word\tword_class\tprob
  BrownCluster.BrownClusterSerializer
  BrownClusterBigramFeatureGeneratorFactory
  Generates Brown clustering features for token bigrams.
  BrownClusterTokenClassFeatureGeneratorFactory
  Generates Brown clustering features for token classes.
  BrownClusterTokenFeatureGeneratorFactory
  Generates Brown clustering features for current token.
  BrownTokenClasses
  Obtain the paths listed in the pathLengths array from the Brown class.
  BrownTokenClassFeatureGenerator
  Generates `BrownCluster` features for current token and token class.
  BrownTokenFeatureGenerator
  Generates `BrownCluster` features for current token.
  CachedFeatureGenerator
  Caches features of the aggregated `generators`.
  CachedFeatureGeneratorFactory
  CharacterNgramFeatureGenerator
  The `CharacterNgramFeatureGenerator` uses character ngrams to generate features about each token.
  CharacterNgramFeatureGeneratorFactory
  DefinitionFeatureGeneratorFactory
  DictionaryFeatureGenerator
  The `DictionaryFeatureGenerator` uses the `DictionaryNameFinder` to generated features for detected names based on the `InSpanGenerator`.
  DictionaryFeatureGeneratorFactory
  DocumentBeginFeatureGenerator
  DocumentBeginFeatureGeneratorFactory
  FeatureGeneratorResourceProvider
  The `FeatureGeneratorResourceProvider` provides access to the resources available in the model.
  FeatureGeneratorUtil
  This class provide common utilities for feature generation.
  GeneratorFactory
  Creates a set of feature generators based on a provided XML descriptor.
  GeneratorFactory.AbstractXmlFeatureGeneratorFactory
  InSpanGenerator
  Generates features if the tokens are recognized by the provided `TokenNameFinder`.
  OutcomePriorFeatureGenerator
  The definition feature maps the underlying distribution of outcomes.
  PosTaggerFeatureGenerator
  PosTaggerFeatureGeneratorFactory
  POSTaggerNameFeatureGenerator
  Adds the token POS Tag as feature.
  POSTaggerNameFeatureGeneratorFactory
  PrefixFeatureGenerator
  PrefixFeatureGeneratorFactory
  PreviousMapFeatureGenerator
  This `AdaptiveFeatureGenerator` generates features indicating the outcome associated with a previously occurring word.
  PreviousMapFeatureGeneratorFactory
  PreviousTwoMapFeatureGenerator
  This `AdaptiveFeatureGenerator` generates features indicating the outcome associated with two previously occurring words.
  SentenceFeatureGenerator
  This feature generator creates sentence begin and end features.
  SentenceFeatureGeneratorFactory
  StringPattern
  Recognizes predefined patterns in strings.
  SuffixFeatureGenerator
  SuffixFeatureGeneratorFactory
  TokenClassFeatureGenerator
  Generates features for different for the class of the token.
  TokenClassFeatureGeneratorFactory
  TokenFeatureGenerator
  Generates a feature which contains the token itself.
  TokenFeatureGeneratorFactory
  TokenPatternFeatureGenerator
  Partitions tokens into sub-tokens based on character classes and generates class features for each of the sub-tokens and combinations of those sub-tokens.
  TokenPatternFeatureGeneratorFactory
  TrigramNameFeatureGenerator
  Adds trigram features based on tokens and token classes.
  TrigramNameFeatureGeneratorFactory
  WindowFeatureGenerator
  Generates previous and next features for a given `AdaptiveFeatureGenerator`.
  WindowFeatureGeneratorFactory
  WordClusterDictionary
  WordClusterDictionary.WordClusterDictionarySerializer
  WordClusterFeatureGenerator
  WordClusterFeatureGeneratorFactory
  Defines a word cluster generator factory; it reads an element containing 'w2vwordcluster' as a tag name; these clusters are typically produced by word2vec or clark pos induction systems.