Web Service概念和术语

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1、WebService概念和术语一.WebService基本的概念XML(eXtensibleMarkupLanguage)XMLisusedtoorganizedocumentsandbusinessdata.XMLfilescanbestoredortransmittedbetweentwoapplicationsonanetwork.Basically,theyarejustplaintextdocumentsthatcontainspecialtagsthatlabeldifferentpartsofadocumentorfieldso

2、fdata.XML是一种由规范定义的元语言。XML标记语言定义了一套用来组织和描述文本的标记（tag）。标记通常成对出现，其中一个标记是开始标记，另一个标记是结束标记。位于这两个标记之间的所有内容均成为元素。SOAP(SimpleObjectAccessProtocol)SOAPdefinesastandardpackagingformatfortransmittingXMLdatabetweenapplicationsonanetwork.ASOAPmessageisjustanXMLdocument.SOAPisspeciallydesi

3、gned,however,tocontainandtransmitotherXMLdocumentsaswellasinformationrelatedtorouting,processing,security,transactions,andotherqualitiesofservice.SOAP消息是一种XML文档，它有其自己的XML模式、命名空间和处理规则。目前的版本是SOAP1.2。WSDL(WebServicesDescriptionLanguage)WSDLisastandardfordescribingthestructureo

4、ftheXMLdataexchangedbetweentwosystemsusingSOAP.WSDL是一个用于精确描述Web服务的文档格式，它用来指定客户与具体的Web服务通信时必须使用的确切的消息格式、Internet协议以及地址。目前的版本是WSDL2.0UDDI(UniversalDescription,Discovery,andIntegration)UDDIdefinesastandardsetofWebserviceoperations(methods)thatareusedtostoreandlookupinformation

5、aboutotherWebserviceapplications.Inotherwords,UDDIdefinesastandardSOAP-basedinterfaceforaWebservicesregistry.YoucanuseaUDDIregistrytofindaparticulartypeofWebservice,ortofindoutabouttheWebserviceshostedbyaspecificorganization.AUDDIregistryisoftenreferredtoasa"YellowPages"for

6、Webservices.TheUDDIspecificationisnowmaintainedbytheOrganizationfortheAdvancementofStructuredInformationStandards(OASIS)UDDI定义了一套标准的Web服务操作方法，用于存储、查找有关其他Web服务应用程序方面的信息。WS-IBP(WebServicesInteroperabilityBasicProfile)WebServicesInteroperabilityOrganizationisanorganizationofWe

7、bservicesvendorsthatarecommittedtodefiningastandardforWebservicesinteroperability.ThefirstdeliverableoftheWS-IwastheBasicProfile1.0,第二个是WS-IBasicProfile2.0二．WebServiceAdvanced概念WS-AddressingWS-AddressingspecificationistoprovidethemeanstoidentifyaWebserviceendpointandawaytou

8、sesuchidentifiersinSOAPmessagesforthedeliveryandexchangeofmessagesbetweenWebservic