info.ephyra.nlp.semantics.ontologies
Class DomainOntology

java.lang.Object
  edu.cmu.lti.javelin.qa.JavelinOntologyAdapter
      info.ephyra.nlp.semantics.ontologies.DomainOntology

All Implemented Interfaces:

Ontology, Dictionary

public class DomainOntology
extends edu.cmu.lti.javelin.qa.JavelinOntologyAdapter
implements Ontology

An ontology for a specific domain created from resource files.

This class extends the class JavelinOntologyAdapter and implements the interface Ontology.

Version:

2007-02-11

Author:

Nico Schlaefer

Field Summary

private HashDictionary

dict Dictionary of words in the ontology.

Fields inherited from class edu.cmu.lti.javelin.qa.JavelinOntologyAdapter

alternationMap, edgeCost, relationMaps

Constructor Summary

DomainOntology(java.lang.String ontologyFile, java.lang.String alternationsFile, java.lang.String costsFile)
Creates the ontology for a specific domain from input files.

Method Summary

boolean	contains(java.lang.String word) Looks up a word.
java.util.Map<java.lang.String,java.lang.Double>	expandEntity(java.lang.String entity) Expands an entity by looking up related entities.
java.util.Map<java.lang.String,java.lang.Double>	expandEvent(java.lang.String event) Expands an event by looking up related events.
java.util.Map<java.lang.String,java.lang.Double>	expandModifier(java.lang.String modifier, net.didion.jwnl.data.POS pos) Expands a modifier by looking up related modifiers.

Methods inherited from class edu.cmu.lti.javelin.qa.JavelinOntologyAdapter

destroy, expandMapTransitive, expandMapTransitiveLeaves, expandPredicate, getInstance, hasChildren, hasParent, initialize, lookupNoun, main, prettyPredicate, testPredicate

Methods inherited from class java.lang.Object

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

Field Detail

dict

private HashDictionary dict

Dictionary of words in the ontology.

Constructor Detail

DomainOntology

public DomainOntology(java.lang.String ontologyFile,
                      java.lang.String alternationsFile,
                      java.lang.String costsFile)

Creates the ontology for a specific domain from input files.

Parameters:

ontologyFile - words and relations between them

alternationsFile - alternations of roles associated with relations

costsFile - weights for the relations

Method Detail

contains

public boolean contains(java.lang.String word)

Looks up a word.

Specified by:

contains in interface Dictionary

Parameters:

word - the word to look up

Returns:

true iff the word was found

expandEvent

public java.util.Map<java.lang.String,java.lang.Double> expandEvent(java.lang.String event)

Expands an event by looking up related events.

Specified by:

expandEvent in interface Ontology

Parameters:

event - an event

Returns:

related events and their weights

expandEntity

public java.util.Map<java.lang.String,java.lang.Double> expandEntity(java.lang.String entity)

Expands an entity by looking up related entities.

Specified by:

expandEntity in interface Ontology

Parameters:

entity - an entity

Returns:

related entities and their weights

expandModifier

public java.util.Map<java.lang.String,java.lang.Double> expandModifier(java.lang.String modifier,
                                                                       net.didion.jwnl.data.POS pos)

Expands a modifier by looking up related modifiers.

Specified by:

expandModifier in interface Ontology

Parameters:

modifier - a modifier

pos - its part of speech: POS.ADJECTIVE or POS.ADVERB

Returns:

related modifiers and their weights