|
Class Summary |
| AdaptiveNumberOfKeywordsFilter |
An adaptive version of the NumberOfKeywordsFilter that also
takes occurrences of keywords in preceding text snippets into account. |
| AnswerPatternFilter |
The AnswerPatternFilter uses answer patterns to extract
factoid answers from text passages and to rank them. |
| AnswerProjectionFilter |
The AnswerProjectionFilter projects answers from the Web onto
a corpus. |
| AnswerTypeFilter |
The AnswerTypeFilter extracts factoid answers of the expected
answer types from text passages. |
| CacheResultsFilter |
Caches the results along with the query string of the first result. |
| CombineScoresFilter |
Combines the extra scores of each Result and sets the main
score to their sum. |
| CutKeywordsFilter |
Trims answer candidates for definitional questions to improve the
precision by chopping of leading news agency acronyms and cities. |
| CutStatementProviderFilter |
Trims answer candidates for definitional questions to improve the
precision by chopping of leading introductions of indirect speech. |
| DeserializationFilter |
The DeserializationFilter reads serialized results from one
or more files. |
| DirectSpeechFilter |
Drops answer candidates for definitional questions that consist of direct
speech. |
| DuplicateFilter |
The DuplicateFilter drops duplicate results. |
| DuplicateSnippetFilter |
A variant of the DuplicateFilter for answer candidates that
are text snippets. |
| FactoidsFromPredicatesFilter |
The FactoidsFromPredicatesFilter extracts factoid answers
from predicate-argument structures. |
| FactoidSubsetFilter |
The FactoidSubsetFilter checks a set of factoid answers for
subset relations. |
| Filter |
A Filter is part of a pipeline for answer extraction and
selection. |
| FunctionWordsFilter |
A filter that drops a result if the answer string contains only function
words. |
| GoogleTermImportanceFilter |
A web term importance filter that counts term frequencies in text snippets
retrieved with the Google search engine. |
| HitPositionComparator<T> |
The HitPositionComparator compares two Result
objects by comparing their hit positions. |
| HitPositionFilter |
Scores the results according to their hit positions. |
| HitPositionSorterFilter |
The HitPositionSorterFilter sorts the results by their hit
positions in ascending order. |
| NormalizedScoreSorterFilter |
The NormalizedScoreSorterFilter sorts the results by their
normalized scores in descending order. |
| NounPhraseFilter |
Scores answer candidates for definitional questions according to the
number of novel noun phrases they contain. |
| NuggetEvaluationFilter |
Automatically evaluates answer candidates for the 'other' questions in
TREC 13-16. |
| NumberOfKeywordsFilter |
Filters results by the number of keywords. |
| OverlapAnalysisFilter |
Generates overlap analyses for different answer extraction strategies. |
| PredicateExtractionFilter |
Extracts predicates which are similiar to those in the question from
documents. |
| PreferNamedEntitiesFilter |
The PreferNamedEntitiesFilter prefers factoid answers that
are named entities over other factoid answers. |
| ProperNameFilter |
Drops answer candidates for definitional questions that are enumerations
of proper names. |
| QueryScoreFilter |
This filter simply increments the score of each result by the score of the
query that was used to obtain the result. |
| QuestionKeywordsFilter |
A filter that drops a result if the answer string contains a keyword from
the question. |
| ResultLengthComparator<T> |
The ResultLengthComparator compares two Result
objects by comparing the lengths of the answer strings. |
| ResultLengthFilter |
A filter that cuts off results if the total length of non-whitespace
characters exceeds a threshold. |
| ResultLengthSorterFilter |
The ResultLengthSorterFilter sorts the results by the lengths
of the answer strings in ascending order. |
| ReverseScoreSorterFilter |
The ReverseScoreSorterFilter sorts the results by their
scores in ascending order. |
| ScoreCombinationFilter |
The ScoreCombinationFilter combines the normalized scores of
an answer extracted with several techniques into a single score. |
| ScoreNormalizationFilter |
A filter that normalizes the scores of the answer candidates by applying a
trained classifier. |
| ScoreResetterFilter |
Filter setting the score of each result to 0. |
| ScoreSorterFilter |
The ScoreSorterFilter sorts the results by their scores in
descending order. |
| SentenceExtractionFilter |
Splits the answer strings of results that are not from knowledge
annotators into sentences and creates a new result for each sentence. |
| SentenceSplitterFilter |
Splits text snippets into sentences in order to facilitate the detection
of redundant information. |
| SerializationFilter |
The SerializationFilter serializes the results and writes
them to a file. |
| StopwordFilter |
A filter that drops a result if the answer string
contains only function words and single characters (except digits)
contains an interrogative
contains a single bracket or quotation mark
is an adverb
This filter is not applied to answer strings that have been extracted with
a rule- or list-based NE tagger since these answers are assumed to be
properly formatted. |
| SubclauseSplitterFilter |
Splits sentences into subclauses in order to facilitate the detection of
redundant information. |
| TermFilter |
Drops answer candidates for the 'other' questions in TREC 13-16 that
contain answers to previous factoid or list questions. |
| TermImportanceFilter |
Prefers answer candidates for definitional questions that contain common
keywords. |
| TripletFilter |
Scores answer candidates for definitional questions according to the
number of novel NP-VP-NP triplets they contain. |
| TruncationFilter |
A filter that truncates the answer strings. |
| UnnecessaryCharactersFilter |
Drops unnecessary characters from answer candidates for definitional
questions to improve precision. |
| WebDocumentFetcher |
A thread that fetches a web document containing a given search engine
snippet. |
| WebDocumentFetcherFilter |
A filter that fetches web documents that contain the given search engine
snippets. |
| WebTermImportanceFilter |
A web reinforcement approach that ranks answer candidates for definitional
questions. |
| WebTermImportanceFilter.CacheEntry |
|
| WebTermImportanceFilter.TargetGeneratorTest |
|
| WikipediaGoogleTermImportanceFilter |
A web term importance filter that counts term frequencies in a Wikipedia
article on the target of the question. |
| WikipediaTermImportanceFilter |
A web term importance filter that counts term frequencies in a Wikipedia
article on the target of the question. |
| YahooTermImportanceFilter |
A web term importance filter that counts term frequencies in text snippets
retrieved with the Yahoo search engine. |