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1、AutomaticallyOntologyConstructedFromOnlineOntology2008－12－25數(shù)據(jù)庫的語義檢索需要多領域本體的支持。如何重用這些本體？WEB上越來越多的InterLinkingRDFdata,粗略估計，RDF三元組的數(shù)量為：2billionInterlinkedbyaround3millionRDFlinks。當前基于keyword的語義搜索引擎（swoogle,SWSE,Falcons等）僅返回一個本體列表，并沒有進一步的提供本體重用支持。Web上越來越多的本體為用戶提供API，如YAGO，DBPedia,Gename,D
2、BLP等BackgroundandMotivation本體開發(fā)的方式Fromscratch－很困難，需要領域?qū)＜业膮⑴cOntologyreuse－一種好的選擇本體的構(gòu)建步驟確定應用領域術(shù)語明確術(shù)語間的聯(lián)系、屬性及約束本體的“模塊化”（Modularization）技術(shù)允許用戶協(xié)同開發(fā)，導入本體模塊（module）,但并沒有提供抽?。╡xtraction）或合并(merge)用戶感興趣的本體部分的支持.如何自動構(gòu)建面向特定應用的領域本體？BackgroundandMotivationArchitectureOntoExtractorOntoRankerExtracto
3、rMap&MergeOnto1Onto2Onton……OWLOntoKBSearchURIsTermsReasonerSPARQLProcessorOWLOntologyTranslatorTranslatingMethodsManytomany-AtableTonlyusedtorelatetwoothertableT1,T2(manytomany)T1->c1,T2->c2,op1.domain=c1,op1.range=c2,op2->domain=c2,op2->range==c1.Referentialintegrityconstraints(i.e.if
4、TisrelatedtoT1byaforeignkeywhichisprimarykeyatthesametime,thenTismappedtoasubclassoftheclasscorrespondingtoT1.)T,T1->C,C1,CsubClassOfC1TranslationfromRDBtoRDF(S)/OWLReferentialconstraints(i.e.ifatableThasareferentialconstraintwithT1,andifc,c1aretheclassescorrespondingtoT,T1respectively
5、,thenweassigntocanobjectpropertyopwhoserangeisc1,andweassigntoc1anobjectpropertyop'whoserangeisc.TopreservetheoriginaldirectionofthereferentialconstraintfromTtoT1,wesettheobjectpropertyopasfunctional)t,t1->c,c1,op.domain=c,op.range=c1,op’.domain=c1,op’.range=c,op.hasFunctionalProperty.
6、Inothercase,tablenamecanbetranslatedintoclass;columnnamesthatarenotforeignkeycanbetranslatedintoDatatypeProperty.TranslationfromRDBtoRDF(S)/OWLDrawbacksWithoutconsideringmoreconstraintinformationandrecordsinformation,examplecolumnsvalueconstraint.Translatingallcolumnnamesthatarenotfore
7、ignkeyintodatatypepropertymaybenotappropriateforsomespecificapplication.TranslationfromRDBtoRDF(S)/OWLSwoogleOntoRankDifferentiallytreatthefollowing4relations.Eachofrelationswereassigneddifferentlyweight.Imports(A,B)User-terms(A,B)Extends(A,B)Asserts(A,B)OntologiesrankingOntokhojCons
