Understanding Web Services
At their heart, web services exchange data encoded as XML over the Web. Many websites today are simply mashups—websites created by combining multiple web services into one application. Web services are generally categorized in two ways—public web services and enterprise web services. Public web services expose data that is unrestricted to all computer users with Internet access. Some examples of public web services are Amazon’s E3 web service, eBay’s marketplace web service, and many Really Simple Syndication (RSS) feeds. Figure 23-1 shows you a conceptual diagram of a public web service.
Figure 23-1. Public web services ...
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