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WSDL is one of the three primary components of
web services. It is a standard
that defines service interfaces.
"WSDL is an XML format for describing network
services as a set of endpoints operating on messages containing
either document-oriented or procedure-oriented information."
WSDL descriptions contain:
- Types: a container
for data type definitions using some type system (such as XSD).
- Message:
an abstract, typed definition of the data being communicated.
- Operation:
an abstract description of an action supported by the service.
- Port Type:
an abstract set of operations supported by one or more endpoints.
- Binding:
a concrete protocol and data format specification for a particular
port type.
- Port: a single
endpoint defined as a combination of a binding and a network
address.
- Service:
a collection of related endpoints.
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WSDL 1.1 is currently
the most commonly used version and is a part of the WS-Basic
Profile.
See: WSDL 1.0, WSDL
1.1, WSDL 1.2
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