| Name | Description | Type | Package | Framework |
| AbstractEventStream | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| AbstractObjectStream | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| AdaptiveFeatureGenerator | An interface for generating features for name entity identification and for updating document level contexts. | Interface | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| AdditionalContextFeatureGenerator | The AdditionalContextFeatureGenerator generates the context from the passed in additional context. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| AggregatedFeatureGenerator | The AggregatedFeatureGenerator aggregates a set of AdaptiveFeatureGenerators and calls them to generate the features. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| ArtifactProvider | Provides access to model persisted artifacts. | Interface | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| ArtifactSerializer | Responsible to create an artifact from an InputStream. | Interface | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| ArtifactToSerializerMapper | | Interface | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BaseModel | This model is a common based which can be used by the components Provide sub classes access to serializers already in constructor | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| BaseToolFactory | Base class for all tool factories. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| BeamSearch | Performs k-best search over sequence. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| BeamSearchContextGenerator | Interface for context generators used with a sequence beam search. | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| BigramNameFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BrownBigramFeatureGenerator | Generates Brown cluster features for token bigrams. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BrownCluster | Class to load a Brown cluster document: word\tword_class\tprob http://metaoptimize. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BrownCluster .BrownClusterSerializer | | Class | opennlp.tools.util.featuregen.BrownCluster | Natural Language Processing (OpenNLP) |
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| BrownTokenClasses | Obtain the paths listed in the pathLengths array from the Brown class. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BrownTokenClassFeatureGenerator | Generates Brown cluster features for current token and token class. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| BrownTokenFeatureGenerator | Generates Brown cluster features for current token. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| Cache | Provides fixed size, pre-allocated, least recently used replacement cache. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| CachedFeatureGenerator | Caches features of the aggregated AdaptiveFeatureGenerators. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| CharacterNgramFeatureGenerator | The CharacterNgramFeatureGenerator uses character ngrams to generate features about each token. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| ClassSerializer | | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| CollectionObjectStream | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| CountedSet | Set which counts the number of times a values are added to it. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| CrossValidationPartitioner | Provides access to training and test partitions for n-fold cross validation. | Class | opennlp.tools.util.eval | Natural Language Processing (OpenNLP) |
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| CrossValidationPartitioner .TrainingSampleStream | The TrainingSampleStream which iterates over all training elements. | Class | opennlp.tools.util.eval.CrossValidationPartitioner | Natural Language Processing (OpenNLP) |
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| CustomFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| DictionaryFeatureGenerator | The DictionaryFeatureGenerator uses the DictionaryNameFinder to generated features for detected names based on the InSpanGenerator. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| DocumentBeginFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| EvaluationMonitor | | Interface | opennlp.tools.util.eval | Natural Language Processing (OpenNLP) |
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| Evaluator | The Evaluator is an abstract base class for evaluators. | Class | opennlp.tools.util.eval | Natural Language Processing (OpenNLP) |
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| EventTraceStream | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| ExtensionLoader | The ExtensionLoader is responsible to load extensions to the OpenNLP library. | Class | opennlp.tools.util.ext | Natural Language Processing (OpenNLP) |
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| ExtensionNotLoadedException | Exception indicates that an OpenNLP extension could not be loaded. | Class | opennlp.tools.util.ext | Natural Language Processing (OpenNLP) |
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| ExtensionServiceKeys | | Class | opennlp.tools.util.ext | Natural Language Processing (OpenNLP) |
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| FastTokenClassFeatureGenerator | Generates features for different for the class of the token. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| FeatureGeneratorAdapter | This class provides empty implementations of some of the optional methods in AdditionalContextFeatureGenerator to make implementing feature generators | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| FeatureGeneratorFactory | The FeatureGeneratorFactory interface is factory for AdaptiveFeatureGenerators. | Interface | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| FeatureGeneratorFactorySerializer | | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| FeatureGeneratorResourceProvider | The FeatureGeneratorResourceProvider provides access to the resources provided in the model. | Interface | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| FeatureGeneratorUtil | This class provide common utilities for feature generation. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| FilterObjectStream | Abstract base class for filtering ObjectStreams. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| FMeasure | The FMeasure is an utility class for evaluators which measure precision, recall and the resulting f-measure. | Class | opennlp.tools.util.eval | Natural Language Processing (OpenNLP) |
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| GeneratorFactory | Creates a set of feature generators based on a provided XML descriptor. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| GenericModelSerializer | | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| HashList | Class which creates mapping between keys and a list of values. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| Heap | Interface for interacting with a Heap data structure. | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| InputStreamFactory | Allows repeated reads through a stream for certain types of model building. | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| InSpanGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| InvalidFormatException | This exception indicates that a resource violates the expected data format. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| ListHeap | This class implements the heap interface using a List as the underlying data structure. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| MarkableFileInputStreamFactory | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| Mean | Calculates the arithmetic mean of values added with the add(double) method. | Class | opennlp.tools.util.eval | Natural Language Processing (OpenNLP) |
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| ModelType | | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| ModelUtil | Utility class for handling of MaxentModels. | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| ObjectStream | Reads Objects from a stream. | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| ObjectStreamUtils | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| OSGiExtensionLoader | OSGi bundle activator which can use an OSGi service as an OpenNLP extension. | Class | opennlp.tools.util.ext | Natural Language Processing (OpenNLP) |
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| OutcomePriorFeatureGenerator | The definition feature maps the underlying distribution of outcomes. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| ParagraphStream | Stream filter which merges text lines into paragraphs. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| PlainTextByLineStream | Reads a plain text file and return each line as a String object. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| PrefixFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| PreviousMapFeatureGenerator | This FeatureGeneratorAdapter generates features indicating the outcome associated with a previously occuring word. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| PreviousTwoMapFeatureGenerator | This FeatureGeneratorAdapter generates features indicating the outcome associated with two previously occuring words. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| ResetableIterator | This interface makes an Iterator resetable. | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| ReverseListIterator | An iterator for a list which returns values in the opposite order as the typical list iterator. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| SentenceFeatureGenerator | This feature generator creates sentence begin and end features. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| Sequence | Represents a weighted sequence of outcomes. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| SequenceCodec | | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| SequenceValidator | | Interface | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| SerializableArtifact | | Interface | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| Span | Class for storing start and end integer offsets. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| StringList | The StringList is an immutable list of Strings. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| StringPattern | Recognizes predefined patterns in strings. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| StringUtil | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| SuffixFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| TokenClassFeatureGenerator | Generates features for different for the class of the token. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| TokenFeatureGenerator | Generates a feature which contains the token itself. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| 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. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| TrainingParameters | | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| TreeHeap | An implementation of the Heap interface based on SortedSet. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| TrigramNameFeatureGenerator | Adds trigram features based on tokens and token classes. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| UncloseableInputStream | An InputStream which cannot be closed. | Class | opennlp.tools.util.model | Natural Language Processing (OpenNLP) |
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| Version | The Version class represents the OpenNlp Tools library version. | Class | opennlp.tools.util | Natural Language Processing (OpenNLP) |
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| WindowFeatureGenerator | Generates previous and next features for a given AdaptiveFeatureGenerator. | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| WordClusterDictionary | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |
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| WordClusterDictionary .WordClusterDictionarySerializer | | Class | opennlp.tools.util.featuregen.WordClusterDictionary | Natural Language Processing (OpenNLP) |
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| WordClusterFeatureGenerator | | Class | opennlp.tools.util.featuregen | Natural Language Processing (OpenNLP) |