面向WEB的XML数据管理技术研究

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1、ABSTRACTAsthoglobalinformationmatrix，WWWcontainsallkindsofdata，includingstructured，semi—structuredandnostructureddataMuchreseatchhasfocusedonthesiudyofWebdatamanagement，however,itscurrentstatusiSstillfarfrolnsatisfactionofW曲useYs．XMLhasbecomethedefactostand

2、ardtorepresentdatainWWWanditprovidesaunifomdatamodelforWebdata．ItiSreasonabletoimaginethatmostofthedataonW曲willbeinXML’astheresult，researchonXMLplayacrucialroleinWebdatamanagementanditisimportantforsomeWebapplications，suchasE-CoIDinerce，databaseappliationsa

3、ndInformationRetrieval．ThedissertationfocusesonXMLdatamanagementissues．Themaincontributionsofthispaperincludethefollowing．1．ThisdissertationreviewsthestateofXMLdatamanagementintheWeb．Afteranalyzingseveralproblenis，W曲．OrientedXMLdatanaalaagementsolutionWOXDM

4、Sispresented．Inthissolution，XML-Relationalengine．XML—ObjectOrientedinterlace，XML．DataWarehouseinterfaceandXMLsearchenginearedesignedtoimplementinformationinterchangingandknowledgesharing．ThissolutionprovidesanovelandeffectiveapproachtoXMLdatastorageandXMLin

5、formationretrievalinthecontextofWeb2AfterseveralmethodsofXMLdatastoragearediscussed，thisdissertationtakesworkload(orcost)intoaccountforstoringXMLdatainRDBMS．Thisdissertationpresentsacost—drivenapproachtodesigndifferentdataschemaaccordingtousers’requirementa

6、nditisdifferentfrommethods，whichdesignXMLstoragebyDre—definedrules．Theadvantageofthisapproachiseasilytocreateaspecificmappingfordi圩erentusers3．Anintelligentmethodtoautomaticallyturnthedataschemaaccordingtotheworkloadisputforward．Geneticalgorithm(GA)isthemea

7、nstoprovideagenericandrobustmethodforgettingtheminimumcostformallpossibledataschema．TakingadvantageofGA'sself-adaptiveandself-adjustablefeatures，thismethodireprovesthe1evelofautomaticdatabaseSChemadesign．4BasedonXMLcharactersandChomoskyGrammartheory,thisdis

8、sertationpresentsX—GrammarandDushdownantomatonmodeltoextractstructureinformationfromXMLdatawithhighperformance．ThisapproachisalsosuitableforextractingschemafromXMLdatastreamandincompleteXMLsegment．Expe