RE: WSDL op FAQ (update)

Title: WSDL op FAQ

Updated version:

 

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Q: How does the WS-Reliability protocol 
relate to WSDL operation types?

WS-Reliability has been designed to 
support One-Way and Request-Response operations. The two following requirements 
are observed by WS-Reliability: 

1- An implementation of WS-Reliability 
is not supposed to be aware of the type of WSDL operation associated with the 
messages it is processing. 

2- The RM protocol specified is 
compatible with current WS-I profiles. 

One-Way operations: 

All specified RM features apply to 
these operations, with the following restriction: In order to comply with 
current WS-I profiles, the "Response" reply pattern must not be used with these 
operations. 

Request-Response operations: 

All specified RM features apply to 
these operations, with the exception of the 
"response" leg of the operation, to which the Guaranteed Delivery 
protocol as defined does not apply: the 
HTTP binding required by current WS-I profiles requires a particular 
handling of re-sending that is beyond 
V1.0. It should be noted that the benefits of RM features may not be as obvious 
for this operation type as for the 
previous one: because Request-Response is often supported in a synchronous way 
by SOAP implementations, the application will generally have a level of control 
that may supersede some RM features. For 
example, an application can be 
certain that a delivery of a request 
occurred, when it receives the correlated response.

Because an implementation is not 
required to distinguish messages based on their associated WSDL operation type, an appropriate use of RM 
features will depend on the user layer.