基于xml的關(guān)系數(shù)據(jù)發(fā)布中完整性約束的研究與實(shí)現(xiàn)

1、南開大學(xué)碩士學(xué)位論文基于XML的關(guān)系數(shù)據(jù)發(fā)布中完整性約束的研究與實(shí)現(xiàn)姓名：劉元紅申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：控制理論與控制工程指導(dǎo)教師：賈春福20071101AbstractAbstractNowadays，XML(eXtensibleMarkupLanguage)hasbecomeastandardfordatarepresentationandexchangebetweenvariousapplicationsystemsontheIn

2、ternetMoreandmorerelationaldatabaseapplicationsystemsadoptXMLasthestandardformattopublishandexchangethedataSo，studyingthetransformationmethodbetweentherelationaldataandtheXMLdataandrealizingtheXML—basedpublishingofvariou

3、sisomerousrelationaldatasourceshavebecomeallimportantresearchdirectionincurrentdatamanagementfieldIntegritydataconstraintistherestrictionanddependencerulethatthedataandtheircorrelationspossessinthedatamodelItplaysanimpor

4、tantroleinmaintainingthesemanticinformationintheprocedureofdatapublishingandexchangingTherelationaldatapublishingbasedontheXMListhedataexchangethatisongoingundertwodifferentdatamodels。Thealreadyexistedpublishingtoolsonly

5、aimatthedatastructuretocarryoutadesignwhilelacktheanalysisofthedatasemanticinformationespeciallytheintegri鑼constraintIntheprocedureofXML。baseddatapublishing，thisresultsinthelostoftherestrictionanddependencerulethattheori

6、ginaldataandtheircorrelationspossess，andhencecannotguaranteethattheconstraintinthepredefmedmodeissatisfiedItisthereforeofimportantsignificancewhethertheoreticallyorpracticallytostudytheproblemofmaintainingtheintegri鑼cons

7、traintintheprocedureofthepublishingoftheXMLrelationaldatawhichhasdrawnmoreandmoreattentioninthecurrentXMLdatamanagementfieldAimingattheproblemsmentionedabove，presentdissertationstudiedin—depththeintegrityconstraintproble

8、minvolvedintheXML—basedpublishingofrelationaldataAmethodformaintainingtheintegrityconstrainttothedataintheprocedureofdatapublishingisproposedApublishingsystemformaintainingtheintegrityconstrainttothedataisdesignedThemain

9、tainingmethodisoutlinedasfollowsFirstofall，weuniformlytransformedtheSOUrCemodeandthetargetmodeintoallXMLmodetreeThenweconvertedeachotherthedataintwodifferentdatamodels，allowingustotransforilltheproblemintothedataconversi