info.ephyra.questionanalysis
Class QuestionAnalysis

java.lang.Object
  info.ephyra.questionanalysis.QuestionAnalysis

public class QuestionAnalysis
extends java.lang.Object

Analyzes a question string:

• normalizes the question
• stems verbs and nouns
• resolves verb constructions with auxiliaries
• extracts keywords
• extracts named entities
• extracts and expands terms
• determines focus word and expected answer types
• interprets the question using question patterns
• extracts predicate-argument structures

Version:

2008-01-23

Author:

Nico Schlaefer

Field Summary

private static java.lang.String	context String providing additional contextual information on the question.
private static java.util.ArrayList<Dictionary>	dicts Dictionaries for term extraction.
private static java.util.ArrayList<Ontology>	ontologies Ontologies for term expansion.
private static Predicate[]	predicates Predicates used instead of extracting predicates from the question.
private static QuestionClassifier	qc Question Classifier for determining the answer type.

Constructor Summary

QuestionAnalysis()

Method Summary

static void	addDictionary(Dictionary dict) Registers a Dictionary.
static void	addOntology(Ontology ontology) Registers an Ontology.
static AnalyzedQuestion	analyze(java.lang.String question) Analyzes a question string.
static void	clearContext() Clears the context string.
static void	clearDictionaries() Unregisters all Dictionaries.
static void	clearOntologies() Unregisters all Ontologies.
static void	clearPredicates() Clears the predicates.
private static java.lang.String[]	getAtypes(java.lang.String question)
static java.lang.String	getContext() Returns the context string.
static Dictionary[]	getDictionaries() Returns the Dictionaries.
static Ontology[]	getOntologies() Returns the Ontologies.
static Predicate[]	getPredicates() Returns the predicates.
static void	main(java.lang.String[] args)
static void	setContext(java.lang.String context) Sets the context string.
static void	setPredicates(Predicate[] predicates) Sets predicates that are used instead of extracting predicates from the question.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dicts

private static java.util.ArrayList<Dictionary> dicts

Dictionaries for term extraction.

ontologies

private static java.util.ArrayList<Ontology> ontologies

Ontologies for term expansion.

qc

private static QuestionClassifier qc

Question Classifier for determining the answer type.

context

private static java.lang.String context

String providing additional contextual information on the question.

predicates

private static Predicate[] predicates

Predicates used instead of extracting predicates from the question.

Constructor Detail

QuestionAnalysis

public QuestionAnalysis()

Method Detail

addDictionary

public static void addDictionary(Dictionary dict)

Registers a Dictionary.

Parameters:

dict - a dictionary

addOntology

public static void addOntology(Ontology ontology)

Registers an Ontology.

Parameters:

ontology - an ontology

getDictionaries

public static Dictionary[] getDictionaries()

Returns the Dictionaries.

Returns:

dictionaries

getOntologies

public static Ontology[] getOntologies()

Returns the Ontologies.

Returns:

ontologies

clearDictionaries

public static void clearDictionaries()

Unregisters all Dictionaries.

clearOntologies

public static void clearOntologies()

Unregisters all Ontologies.

setContext

public static void setContext(java.lang.String context)

Sets the context string.

Parameters:

context - context string

getContext

public static java.lang.String getContext()

Returns the context string.

Returns:

context string

clearContext

public static void clearContext()

Clears the context string.

setPredicates

public static void setPredicates(Predicate[] predicates)

Sets predicates that are used instead of extracting predicates from the question.

Parameters:

predicates - the predicates

getPredicates

public static Predicate[] getPredicates()

Returns the predicates.

Returns:

the predicates

clearPredicates

public static void clearPredicates()

Clears the predicates.

getAtypes

private static java.lang.String[] getAtypes(java.lang.String question)

analyze

public static AnalyzedQuestion analyze(java.lang.String question)

Analyzes a question string.

Parameters:

question - question string

Returns:

analyzed question

main

public static void main(java.lang.String[] args)