從關系數據庫學習OWL本體的方法研究.pdf

1、河海大學碩士學位論文從關系數據庫學習OWL本體的方法研究姓名：王琦申請學位級別：碩士專業(yè)：計算機應用技術指導教師：許卓明20060601ABSTRACTThecentralissueoftheSemanticWebiShowtorepresentdatamamachineunderstandableforminorderthatdatacanbesharedandreusedacrossapplicationandenterpriseO

2、ntologyisafoundationofrealizinginformationshareandexchangeatsemanticlevel，andisregardedasakeyenablingtechniquefortheSemanticWebThusquickandcheapontologydevelopmentistherequisitetothewideapplicationoftheSemanticWebHowever

3、manualdevelopmentofontologiesusingcurrentOWL—awareeditorsremainsatediousandcumbersometaskthatcalleasilyresultinaknowledgeacquisitionbottleneckThereforeontologylearningeme昭esasthetimesrequireArelationaldatabaseschemaconta

4、insdomainknowledgeandthusCanbeaSanimportantknowledgesourceofWebontologylearningResearchofanapproachtoOWLontologylearningfromrelationaldatabaseshasallimportantandpracticalsignificanceforcreatingSemanticWebapplications，suc

5、hasmigrationofdataintensivewebsitesintotheSemanticWeb，semanticannotationofdynamicwebpages，anddevelopmentofSemanticWebportalsAimingatthedeficienciesandlimitationsintherelatedworkthispaperputsforwardasemiautomaticapproachf

6、orlearninganOWLontologyfromarelationaldatabase，andimplementsaprototypetoolOntoLeamerTheapproachtakestherelationaldatabaseschemaandinstanceasinputandusesreverseengineeringtechniquestoextractschemainformationfromthedatabas

7、e，combinefragmentrelations，normalizetherelationalschemata(to3NF)，analyseandextractinclusiondependenciesfromtheschemaThenitrealizestheautomatedmappingfromthenormalizedschematatoanOWLontologyfollowingasetofuniversalheurist

8、icmappingrulesandthesyntaxtransformationfromtheabstractsyntaxtotheexchangesyntaxfortheOWLontologyAtypicalcasestudy、ⅣimOntoLeamervalidatedtheeffectivenessoftheproposedlearningapproachKeywords：ontologylearning，relationalda