EAI SeeBeyond Question:

Types – a container for data type definitions using some
type system
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