Web Service Definition Language - "an XML grammar for describing network services as collections of communication endpoints capable of exchanging messages."
Each WSDL document is an XML document whose structure is roughly:
types (uses XML schema to define data types)
message (each message is a struct of "parts", parts are defined using the types defined above)
portType (groups an input message, an output message, and faults into an "operation")
different operations can be defined based on whether there's an input, an output, or
both, and the order in which they happen:
One-way: input only
Request-response: input, then output
Solicit-response: output, then input
Notification: output only
binding (specifies protocol info, i.e. how (but not where) to access the portType)
service (a group of ports)
ports (defines an "endpoint", i.e. where to access a binding)
one wsdl document into another.
- 30 Dec 2003
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