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1.THEPriNCIPLEOFO-RHDM1.1AnalysisoftheExistingMultimediaDataModelThemultimediadatamodelisthekeytechniquefortherealizationofmultimediaspatialinformationmanagement.ThepresentexistingmultimediadatamodelmainlyincludesNFZmultimediadatamodel,object-originalmultimediadatamodelandhyper-mediadatamodelandsoon.Thoughthesethreekindsofmodelcanrealizetheorganizationandmanagementforthemultimediadatainacertaindegree,allofthemhavesomeweaknessduringthespecificuseinspatialmultimediadatamanagement.1.1.1… 相似文献