TAILIEUCHUNG - Adobe Dreamweaver CS3 Unleashed- P29

Adobe Dreamweaver CS3 Unleashed- P29: The good news is Dreamweaver provides numerous windows, panels, inspectors, and toolbars for streamlining the way you build websites. The bad news, unfortunately, is that Dreamweaver provides numerous windows, panels, inspectors, and toolbars for streamlining the way you build websites. Why so many windows, panels, and so on, Dreamweaver is unprecedented in the feature set it provides, allowing developers complete control when building websites and applications | SOAP The Simple Object Access Protocol SOAP is a protocol specification that defines a uniform way of passing XML data between networks. Think of SOAP in terms of HTTP. With HTTP a user requests a page usually by typing in the HTTP address and a response is returned in the form of a website. The protocol that the website was delivered with was HTTP. SOAP on the other hand is the protocol used to define how objects are accessed and transferred across networks typically packaged using XML within a SOAP envelope wrapper. A user or service makes a SOAP request and a response is returned as is the case with HTTP. HTTP The Hypertext Transfer Protocol HTTP drives how we access information on the Web. Web services use SOAP in conjunction with HTTP. Because HTTP is the protocol for accessing information on the Web SOAP can use HTTP to deliver the wrapped XML messages in a universal operating system independent and server technology agnostic format. WSDL The Web Services Definition Language WSDL provides a way for web service providers to describe how and what their web services do where they reside and how to invoke them. You will use WSDL in more detail later in this chapter. UDDI The Universal Description Discovery and Integration service UDDI provides a mechanism for clients to dynamically find other web services. Using a UDDI interface applications can locate and use other web services. You can think of UDDI as a DNS for business applications or web services. As you can see the foundation for web services lies in open standards such as XML SOAP HTTP WSDL and UDDI. But how do these components make up the web services architecture Figure sheds some more light on the subject. Figure . XML SOAP HTTP WSDL and UDDI are all key components in the web services architecture. View full size image inr l drsdory kn ñ t-SO iL-B LOrtSUITl t 1. WSDL eunkact AtpàuHÉ wwytflmíj ú wet aWllU IOIi WifwW WílHtlU nnw oSflui Hio wc-h S rMcB niduü ng m WC0UWI Qtaœas it PM wnt .

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