基于描述的信息集成技术研究

西北师范大学硕士学位论文基于描述的信息集成技术研究姓名：苟和平申请学位级别：硕士专业：计算机软件与理论指导教师：冯百明2008-06——IDMLIDMLISSIDMLIDML1IDML2IDML“”XMLIIWiththepopularityoftheInternetandthedevelopmentofinformationtechnology,informationintegrationsystemsarecarriedoutinallinstitutes.Atpresent,theinformationontheInternetisstoredinavarietyofinformationsystemswithdifferentstructures.Itishardforconsumerstoaccesstheseinformation.Inordertoutilizetheseinformationeffectively,aneffectivetechnologyofinformationintegrationisneededtointegrateinformationfrommultipledistributed,heterogeneousandautonomousinformationsources.Basedonin-depthstudyandanalysisoftheexistinginformationintegrationtechnology,aframeworkofinformationintegrationbasedondescriptionisproposed.Inthisframework,anIDMLisproposedtodescribetheinformationuniformly.TherearetheparametersofaccessingandintegratingtheinformationfromeachofsourcesintheIDMLdocument.AnISSisdevelopedtoaccessandintegratetheinformationfrommultipledistributedandheterogeneoussourcesbyretrievingtheparametersaboutaccessingandintegratinginformationfromthecorrespondingIDMLdocument.Thisframeworkprovidestheuserwithaunifiedviewoftheseinformationandtheusercanconsumeinformationwithoutknowingwheredataare,howdataarestructuredatthesources,whichcanreducethedifficultyofinformationintegration,realizingtheheterogeneousinformationintegration.Inthispaper,theschemaintegrationandinstanceintegrationofinformationisdividedintotwosteps,first,theschemaintegrationisrealizedbyinformationpublisher;second,instanceintegrationisdonebyinformationconsumersintheprocessofconsuminginformation.Becauseallinformationconsumersarejusttorealizetheinstanceintegrationregardlessofschemaintegrationinconsuminginformation,theefficiencyofretrievingtheinformationisimproved.Inthispaper,basedonthestudiesofthekeytechnologiesintheframeworkputforwardbefore,theprototypesystemisdesignedandrealizedtoshowthatthismethodofinformationintegrationisfeasible.Keywords:grid;informationintegration;informationdescription;XMLIIII1.1HTMLXML1231.2[]11-1111WebServices2XML/XMLXML31-2112121121-21.3WebServicesXML1XML2341IDML312REMLREMLXMLREML3WrapperWrapperWrapper4IDML541.41WebServicesCORBA[,]23WebServices[,,]4562[1]413MediatorREMLREMLMediator[7]Mediator[,9]84)IDML1234REML5IDMLIDMLXMLIDML6ISS785Internet2.12.1.1[]1012DCOMSunRMI62DCOMRMI3WebServicesWebServicesWebServicesWebServicesSOAPUDDIWSDLWebServiceWSDLSOAP2.1.2123XMLXMLInternetXML2.1.3Internet72TSIMMIS[]11InformationManifold[]12Agora[]13Carlic[]14MOMIS[]15Squirrel[]16TSIMMISCarlicMOMISSquirrelGAVGlobal-as-ViewInformationManifoldAgoraLAVLocal-as-ViewVersatile[]17CORBAOIMObjectIntegrationModelViaScope[]18CORBA/IIOPMaurizioLenzeriniI=GSMGSGSMGSGS[]19[,]20212.2[]222.2.1182[23]2[24]¾¾¾2.2.2GridwareADCIEarthSystemGridIIESGArgonneNationalLaboratoryGlobus92DataGridGridPhysicsNetworkParticlePhysicsDataGrid2.3InternetWWWWWWGoogle103.13.1.1Materialization3-1WrapperWrapper1n3-1Wrapper1231131233.1.2Mediation3-2WrapperWrapper1nMediator3-21Virtualdatawarehousing12323123-13.23.2.1121333CORBARMIDCOM43.2.2TelnetFTPCPU[22]1233.2.3WebServices1433-31XMLXMLISSIDML2nREMLWrapperWrapperWrapperWrapper.txt.c3-31XMLHTMLWrapperISSSQLREML1532ISSIDMLIDMLISSIDMLIDMLREMLREMLISS3ISSREML16REMLREMLXMLXML4.1XMLeXtensibleMarkupLanguage,XMLXMLXMLXMLXMLXML4.1.1XMLHTMLStandardGeneralizedMarkupLanguage,SGMLSGMLDTDDTDSGMLWeb1989HTMLHTMLSGMLHTMLHTMLDTDWebHTML19982W3CXML174XMLXMLSGMLSGMLHTMLXMLSGMLXMLHTMLXMLHTMLXMLSGMLHTMLXML1XMLWebHTTPURL2XMLWebHTMLHTMLWeb3XMLXMLSGML4XMLXML5HTMLXML4.1.2XML——DTDXMLSchemaXMLXMLXMLXMLDocumentTypeDefinitionSchema1XMLDTDDTD4.14-1DTD4-14-11844-1?xmlversion=1.0encoding=UTF-8?!ELEMENTelement(,,,,)!ELEMENTroot(element+)!ELEMENT(#PCDATA)!ELEMENT(#PCDATA)!ELEMENT(#PCDATA)!ELEMENT(#PCDATA)!ELEMENT(#PCDATA)2XMLSchemaDTDXMLDTDXMLW3C20015XMLSchemaXML4.24-1XMLSchema4-24-2?xmlversion=1.0encoding=UTF-8?xs:schemaxmlns:xs=:elementname=student_info1xs:complexTypexs:sequencexs:elementname=xs:simpleTypexs:restrictionbase=xs:stringxs:maxLengthvalue=50//xs:restriction/xs:simpleType/xs:elementxs:elementname=nillable=truexs:simpleTypexs:restrictionbase=xs:stringxs:maxLengthvalue=50//xs:restriction/xs:simpleType/xs:elementxs:elementname=nillable=truexs:simpleTypexs:restrictionbase=xs:stringxs:maxLengthvalue=50//xs:restriction/xs:simpleType/xs:elementxs:elementname=nillable=truexs:simpleTypexs:restrictionbase=xs:string194xs:maxLengthvalue=50//xs:restriction/xs:simpleType/xs:elementxs:elementname=nillable=truexs:simpleTypexs:restrictionbase=xs:stringxs:maxLengthvalue=50//xs:restriction/xs:simpleType/xs:element/xs:sequence/xs:complexTypexs:keyname=student_info1_PrimaryKey_0xs:selectorxpath=./xs:fieldxpath=//xs:key/xs:element/xs:schemaXMLSchemaDTDXMLSchemaXMLXMLSchemaXMLDTDXMLXMLSchemaXMLXMLSchemaXMLSchemaXMLSchemaXMLXMLAPIXMLXMLSchemaXMLXMLSchemaXMLXMLDTDXMLXMLDTDXMLSchemaXMLDTDXMLSchema4.1.3XMLXMLD