To learn more about web services, and the underlying technologies that make them possible, visit the following websites:

• WSDL specification at http://www.w3.org/TR/wsdl

• UDDI specification at http://www.uddi.org/specification.html

• XML specification at http://www.w3.org/TR/REC-xml

• SOAP specification at http://www.w3.org/TR/SOAP/