A number of great books about Web Services are available, so the material presented here is intended to just be an overview.
If you’re interested in more details on Web Services technology, please refer to the following books:
Java Web Services Unleashed (ISBN: 067232363X) by Robert, J. Brunner, Frank Cohen, et al; Sams Publishing
Building Web Services with Java: Making Sense of XML, SOAP, WSDL, and UDDI (ISBN: 0672321815) by Steve Graham, et al; Sams Publishing
The concept that Web Services communicate using XML was introduced at the beginning of the chapter. It’s worth expanding on here. In case you’ve never seen XML, here’s a sample:
<customer> <name>Fred ...