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About Web Services

So what is a Web service? It's certainly a popular buzzword, but what does it mean? Well, loosely speaking, the term refers to the ability of computers that are remote from each other to exchange information and messages over the World Wide Web (which we'll generally refer to simply as “the Web”).

As an example, let's say there's a computer out there somewhere on the Internet that knows the current temperature at various points all over the world. If you send that computer a latitude and longitude, in the correct format, the remote computer sends back the nearest current temperature it can find. Such a transaction is shown in Figure 22.1.


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