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SOAPing Up Web Services: Page 7 of 11

Level 3 further defines Level 2 elements. This is where you would say, "The transport mechanism for this Level 2 Binding Name is HTTP." Level 3 is different for each Level 2 element, so we will not explore it here.

In summary, WSDL offers three important pieces of information to the client: What messages it recognizes, what transport mechanism it uses to communicate those messages and how to contact this service. The following example is simplified from the SOAP committee's WSDL 1.1 Specification Document:

Recommended Reading
• WSDL (Web Services Definition Language)

• SOAP (Simple Object Access Protocol) Part 1 and Part 2/

First, at what URL are these services located? This is in the "soap:Address location" field of the service definition of the WSDL file: