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1、刘昕鹏等:基于XML的WebGIS通信协议的设计与实现907基于XML的WebGIS通信协议的设计与实现*SupportedbytheNationalNaturalScienceFoundationofChinaunderGrantNos.60030005,60073016,60203002(国家自然科学基金);theNationalHigh-TechResearchandDevelopmentPlanofChinaunderGrantNos.2001AA113151,2002AA135330,2002AA134030(国家高技术研究发展计划(863));theNationalGrandFun
2、damentalResearch973ProgramofChinaunderGrantNo.2002CB312000(国家重点基础研究发展规划(973));theNationalResearchFoundationfortheDoctoralProgramofMinistryofEducationofChinaunderGrantNo.20020001015(国家教育部博士点基金);theNaturalScienceFoundationofBeijingofChinaunderGrantNo.4012007(北京市自然科学基金)作者简介:刘昕鹏(1980－),男,湖北武汉人,硕士生,主要研究领
3、域为WebGIS;罗英伟(1971－),男,博士,副教授,主要研究领域为分布式计算,软件Agent,GIS;汪小林(1972－),男,博士,讲师,主要研究领域为构件技术,软件Agent,GIS;许卓群(1936－),男,教授,博士生导师,主要研究领域为科学计算可视化,并行计算,人工智能,GIS.刘昕鹏,罗英伟+,汪小林,许卓群(北京大学计算机科学技术系,北京100871)DesignandImplementationofXML-BasedCommunicationProtocolsforWebGISLIUXin-Peng,LUOYing-Wei+,WANGXiao-Lin,XUZhuo-Qun
4、(DepartmentofComputerScienceandTechnology,PekingUniversity,Beijing100871,China)+Correspondingauthor:Phn:+86-10-62763373,Fax:+86-10-62765805,E-mail:lyw@pku.edu.cn,http://gis.pku.edu.cnReceived2003-03-17;Accepted2003-09-04LiuXP,LuoYW,WangXL,XuZQ.DesignandimplementationofXML-basedcommunicationprotocols
5、forWebGIS.JournalofSoftware,2004,15(6):899~907.http://www.jos.org.cn/1000-9825/15/899.htmAbstract:Concerningthefeaturesofcomplexobjectsandmassivedatatransmission,anewXML-basedmethodtodesignandimplementcommunicationprotocolsforWebGISispresented.WiththeaidofUML,thetypicalrequiringandrespondingprotocol
6、sofWebGISareanalyzedthroughobject-orientedconcept.Basedonobjectorientedanalysisoftheprotocols,themechanismofdesigningcommunicationprotocolsfollowingW3C’sXMLSchemaspecificationisillustrated.Finally,themainflowofembeddingtheprotocolsintoWebGISisgivenbypackingandparsingXML-basedprotocolsinaWebGISapplic
7、ationprototype.ThiskindofprotocolscanbeusedinspatialinformationexchangeamongheterogeneousWebGISplatformsindistributedenvironment.Keywords:XML;XMLschema;WebGIS;validator;protocol摘要:针对WebGIS通信中面向复杂对象及大容
