基于Ontology和XML的非結(jié)構(gòu)化信息語義表示機制研究.pdf

1、武漢科技大學(xué)碩士學(xué)位論文基于Ontology和XML的非結(jié)構(gòu)化信息語義表示機制研究姓名：張琳申請學(xué)位級別：碩士專業(yè)：計算機應(yīng)用技術(shù)指導(dǎo)教師：陳和平20040420第Ⅱ頁武漢科技大學(xué)碩士學(xué)位論文AbstractWithincreasingdevelopmentofcomputernetworkandsofi3varetechnologyespeciallywiththatofIntemet／Intranet，largeamountsofi

2、nformationresourcesareprovidedtotheirconsumersintheformofvariousunstructuredinsteadofstructuredformatsTheappliedrangeandquantityofunstructuredinformationarerapidlyexpandingTherefore，itisavaluableresearchsubjecttoconstruc

3、taconsistentunstructuredinformationrepresentation，thuslaythefoundationsforestablishingaplatformtoprocessandsearchtheinformationefficientlyThisthesisanalysestheprincipleandadvantageofusingXMLtechnologytodescribeunstructur

4、edinformationuniformlyaimingatitssemanticlimitationthethesisthenimportsthenotionofOntologyandintroducesasemanticrepresentationmechanismofunstructuredinformationbasedonOntologyandXMLXMLpossessesdatapattemrepresentingmetho

5、d，ithasrichfeaturessuchasseparationofcontentandrelationship，syntacticandsemantic，contentandrepresentationetcSoitisverysuitabletodescribeunstructuredinformationInspiteofthesepositivefeaturesandprospectsofXML，itmustbeclear

6、lystatedthatXMLissolelyadescriptionlanguagetospecifythestructureofdocumentsandthustheirsyntacticdimensionTheXMLtagsanddocumentstructureCanrepresentsomesemanticpropertiesbutitisnotclearhowthesecanbedeployedoutsideofspecia

7、lpurposeapplicationsOntologyisaformal，explicitspecificationofasharedconceptualizationItstargetistocapturerelateddomainknowledge，providethesharedunderstandofthedomain，ascertainthesharedvocabulariesortermsofthedomainandmak

8、eexplicitdefinitionaboutthesetermsandtheirrelationshipsfromdifferentformlevelsOursemanticrepresentationmechanismimportssemanticmodelfromOntologyintoXMLdocumentsbyconnectingOntologywithXMLschema1evelspecifications，ieDTDan

9、dXMLSchemaconsequentlyXMLtagsandstructurescanexpressexplicitdomainknowledge，SuchamechanismliftsinformationfromthesyntacticorrepresentationalleveltOthemoreabstractlevelofconceptsandrelationships，andavoidssemanticheterogen

10、eityefficientlyFurthermore，itprovidesexistingapplicationsasemanticlevelsolutionaboutmanagementofunstructuredinformation，whichfacilitatestheseapplicationsandenhancestheirpracticalvaluetoacertainextentFinallythethesisreali

11、zespartialcontentoft11esemanticrepresentationmechanism，andappliesittOtheOBSAmodelofaprojectnamed“WebstoragesystembasedonXML”whichstakedbytheHubeiProvincialDepartmentofEducationorganicallyInOBSA，themechanismpromotestheinf