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WSDL Component Structure
Now let's take a closer look at the interface.
An interface operation contains message references and
fault references. Message references refer to
illustrate: a request/response operation will have two message references, one
for the request message, and one for the response message.
Fault references in an operation point to fault
definitions. In this way, fault definitions are shared among operations.
For describing the content of the messages and faults,
WSDL contains a section called
that contains data schemas.
In XML Schema, the most common language, there are
. Type definitions describe the inner structure of an
element, whereas element declarations give elements their names.
Each operation message reference and each fault
generally points to a single element declaration. The element declaration
describes the body of the message, or the fault details of the fault.