Re: [wsn] Proposed Issue Text: Should UseNotify be a policy utterance?

[Tom Maguire <tmaguire@us.ibm.com>]

-1

One of the premises of the WS-N set of specifications is to provide a set
of protocols and wire formats for Web Services.  Removing the default of
'true' for the UseNotify flag and relegating it to a policy utterance seems
contrary to the aforementioned premise.

Tom

Perfection is achieved, not when there is nothing more to add, but when
there is nothing left to take away.   – Antoine de Saint-Exupery


T o m   M a g u i r e


STSM, On Demand Architecture


Poughkeepsie, NY  12601


                                                                           
             David Hull                                                    
             <dmh@tibco.com>                                               
                                                                        To 
             04/14/2005 03:40          wsn@lists.oasis-open.org            
             PM                                                         cc 
                                                                           
                                                                   Subject 
                                       [wsn] Proposed Issue Text: Should   
                                       UseNotify be a policy utterance?    
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




WSN2.XX: Should UseNotify be a  policy utterance?

The SubscribeRequest message currently contains a specialized <UseNotify>
element indicating whether the producer should use the Notify message
format described in section 3.1.  The Notify message is essentially a
convenience and is not fundamental to the basic Subscribe/Notify pattern.
If it were not already in the base specification, it could clearly be added
via policy.  As such, it should be treated as a pre-defined policy rather
than a built-in feature of notification, just as topic, selector and
precondition are now treated as pre-defined filters.
Making this change would bring WSN more closely in line with WSE and would
also strengthen the extensibility story concerning policy.
Specifications
      WS-BaseNotification
Proposed Recommendations
      Remove the <UseNotify> property from the SubscribeRequest message
      proper and make it an optional child of the <SubscriptionPolicy>
      element (and so the first complete entry in the policy document(s)).
      The element would retain its current semantics.
Notes
Status:
Contact:
      David Hull, Steve Graham
Cross Reference: