WSDL Elements

Types
 Container for the WSDL XML Schema type definitions. The

types elements can have zero more schema elements.
Messages
 Defines abstract message that can serve as the input or

output of an operation.

 Message Exchange Pattern
 1. One-way
 2. Request-response
 3. Solicit-response
 4. Notification

Bindings
 Defines the message format and protocal details for a

web service.
Service
 Defines collection of ports, or endpoints.