一种基于关系数据库的xml文档存储和查询的方法硕士毕业论文

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1、一种基于关系数据库的XML文档存储和查询的方法ARDB-BasedApproachtoStorageandQueryofXMLDocumentContentsChapter1Introduction………………………………………………………………11.1Researchsituationathomeandabroad……………………………………………11.2Themainworkinthethesis…………………………………………………………31.3Structureofthethesis…………………………………………………………4Chapter2BackgroundofXML………………

2、………………………………………52.1OriginandcharacteristicofXML……………………………………………………52.2TypesofXMLdocument……………………………………………………………62.2.1XMLdocument…………………………………………………………………62.2.2DTDdocument…………………………………………………………………72.2.3XMLSchema……………………………………………………………………72.3QuerylanguageofXML……………………………………………………………82.3.1Basicsyntaxo

3、fXPath…………………………………………………………82.3.2Calculationofthepathexpression……………………………………………102.4HeterogeneitybetweenXMLandRDB……………………………………………11Chapter3Storagetransformationbasedonpath…………………………………133.1Storagestructurebasedonpath……………………………………………………133.1.1ValueTable…………………………………………………………………133.1.2No_Value_Tab

4、le……………………………………………………………153.2Storagemappingalgorithm………………………………………………………16Chapter4Mechanismofqueryprocessing…………………………………………184.1Transformationrulesoflinearpathexpression……………………………………184.1.1Simplepathincludingparents-childonly……………………………………194.1.2Simplepathincludingancestor-descendant………………………………

5、……194.2Processingofnon-linearpathexpression…………………………………………22Chapter5Furtheroptimizationofstorageandquery………………………………255.1Schemaofstorageoptimization……………………………………………………255.2Schemaofstorageoptimization……………………………………………………26Chapter6Designandimplementofthesystem……………………………………286.1Wholedesignframeworko

6、fthesystem……………………………………………286.2Functionofthesystemmodules……………………………………………………286.2.1XML-parser……………………………………………………………………286.2.2Storageprocessor………………………………………………………………306.2.3Queryprocessor………………………………………………………………316.3Experimentresultandanalysisofthesystemperformance……………………31Conclusion…………………………………

7、…………………………………………34Reference………………………………………………………………………………36Acknowledgment………………………………………………………………………40摘要XML已成为Web上数据表示、集成和交换的标准，它的格式简单、自我描述能力强，实现了内容、结构和表现三者的分离，更适合于数据表示和交换。近年来，XML在各个领域得到了广泛的使用，Web上已经涌