LexOnto A Model for Ontology Lexicons for Ontology-based NLP

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1、LexOnto:AModelforOntologyLexiconsforOntology-basedNLPP.Cimiano1,P.Haase1,M.Herold1,M.Mantel1,P.Buitelaar21InstituteAIFB,Universit¨atKarlsruhe,Germany{pci,pha}@aifb.uni-karlsruhe.dematthias.mantel@gmx.net,mattonline@mac.de2DFKI,Stuhlsatzenhausweg3,Saarbr¨ucken,Germanypaulb@dfki.deAbs

2、tract.Inthispaperwepresentamodelandacorrespondingontol-ogyforassociatinglexicalinformationtoentitiesofagivendomainon-tology.Inparticular,wefocusonrepresentingsubcategorizationframesaswellastheirmappingtoontologicalstructures.Thelexiconmodelandontologycanthusbeusedtospecifythesyntax-

3、semanticinterfaceforontology-basedNLPsystemswhichareexpectedtoproduceoutputcompliantwithaspecificdomainontology.OurlexiconontologyitselfisformalizedintheOWLlanguage,thusallowingthelexicatobepublishedtogetherwiththedomainontologies.Wealsodiscussdifferentwayshowthecreationofappropriatel

4、exicacanbesupported.1IntroductionFormanyapplicationsinaspecificdomain,NLPsystemsarerequiredtopro-duceoutputstructurescompliantwithaspecificdomainontology.Insuchcases,NLPsystemsneedto“speakthelanguage”oftheunderlyinginformationsystemwhichstoresthedatainaknowledgebase.Intechnicalterms,t

5、heNLPsystemneedstoproducestructureswhicharecompliantwiththeontologyonthebasisofwhichtheinformationsysteminquestionhasbeenbuilt.Forthispurpose,anyontology-basedNLPsystemrequiresalexiconwhichmapsexpressionsinnaturallanguagetocorrespondingontologystructures.Inthisarticleweareconcernedw

6、iththedesignofarichlexiconmodelwhichallowsfordeclarativelyrepresent-ingthemappingbetweenlanguageandagivendomainontology.Ourviewofontology-basedNLPisthusinlinewiththeoneof“OntologicalSemantics”[1]inthesensethatNLPsystemsareexpectedtoproduceontologicalstructureswhichhaveawell-definedme

7、aningaxiomatizedbyanunderlyinglogicaltheory.Animportantrequirementinourviewisthattheselexicaarenotspecifiedinsomeproprietaryformbutinsuchawaythattheycanbe(i)publishedtogetherwiththedomainontologiesand(ii)reusedacrosssystems.Suchinteroperabilitycanbeachievediflexicaaredescribedusingon

8、tologiesandresortin