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Real World XML Web Services: For VB and VB .NET Developers by Yasser Shohoud

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Chapter 3. SOAP: Invoking Web Services

I think there's a world market for about five computers.

—Thomas Watson

In Chapter 1, you learned how to invoke a Web service using the SOAP Toolkit and .NET. In this chapter, you will learn how these tools and others use SOAP messages to invoke Web services. I will explain the goals and architecture of SOAP and the ways it can be used, including messaging and RPC. Chapter 3 will teach you SOAP's capabilities and functionalities, so that you get a better understanding of the tools you'll be using, such as .NET and the SOAP Toolkit. Such understanding will come in handy when you need to invoke a Web service and you find the tools have limitations that prevent you from using them. This chapter and the next ...

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