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A form -- whether a sheet of paper or a web page -- represents a structured exchange of data. Web services, as typified by emerging standards like SOAP, WSDL, and UDDI, is an excellent approach to exchanging data in a structured way, although usually the exchange is between machines. Since computers are much better at, well, computing, web services is an important and overdue development in the evolution of the Web. Nevertheless, web services applications exchanging information only between machines isn't very interesting: lots of electronically accessible information originates with ordinary human beings.
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