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Java™ Web Services Unleashed by Mark Wutka, Joseph Weber, Arthur Ryman, K. Scott Morrison, Benoît Marchal, Matthias Kloppmann, Steven Haines, Darren Govoni, Francisco Curbera, Frank Cohen, Robert Brunner

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Basic UDDI

Like many other Web services protocols, UDDI is a layer on top of SOAP, as shown in Figure 9.1.

Figure 9.1. UDDI uses SOAP, XML, and lower-level Internet protocols.

Just like the phone book, UDDI has two main users: clients and publishers. A publisher is a company that offers Web services—in the phone book analogy, it's someone who publishes his or her number in the book. A client is someone who is searching for a Web service—the person thumbing through the phone book. Figure 9.2 shows the high-level view of the UDDI world.

Figure 9.2. Clients, publishers, and UDDI registries make up the UDDI world.

In many ways, UDDI is also like the ...

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