FW: On WSDL attributes

Folks,

Steve G wrote:

> David, these are good points, why not post them to the list?

Thanks, and here it is for everyone.

> 
> ++++++++
> Steve Graham
> sggraham@us.ibm.com
> (919)254-0615 (T/L 444)
> STSM, On Demand Architecture
> ++++++++
> 
> 
> 
>                  
>                     David Snelling
>                     <d.snelling@fle.f        To:       Steve
> Graham/Raleigh/IBM@IBMUS, <vbp@hp.com>, <umit.yalcinalp@oracle.com>
>                     ujitsu.com>              cc:       Sanjiva
> Weerawarana/Watson/IBM@IBMUS
>                                              Subject:  Re: On WSDL attributes
>                     09/11/2003 06:33
>                     AM
>                  
>                  
> 
> 
> 
> 
> Steve,
> 
> On 10/9/03 20:36, "Steve Graham" <sggraham@us.ibm.com> wrote:
> 
>> I am not keen to waste my time if we think the chance of success is not
>> too high.
> 
> I understand, but I wouldn't give up yet.
> 
>> Thoughts?
> 
> See below.
> 
> "Jeffrey Schlimmer"   Wrote:
> 
>> Savas, we agree. General Web services do not need a first-class notion
>> of persistent state associated with a service.
> 
> I would not necessarily equate attributes with state in the service. The
> current proposal is really just shorthand for operations. [BTW: Calling
> them'operations' implies service state, since something must be operated upon.
> If SOA were truly stateless, they would be called 'functions'.]
> 
>> Adding functionality to the Web service model necessarily implies
>> additional constraints on underlying implementations. To facilitate
>> cross-platform interoperability, we must be careful to minimize the
>> architectural constraints on implementations. The current
>> message-oriented definition of Web services appears to be an excellent
>> tradeoff between function and minimal architectural commitment.
> 
> I don't believe that the current proposal extends the complexity of the
> implementation at all. Certainly no more constraints.
> 
>> There are communities who wish to associate state with service
>> instances; our WG should ensure that they can do so through
>> extensibility.
> 
> If needs must, we will and have, but we want a wider community to share
> capabilities without having to buy into the whole thing.
> 
> --
> 
> Take care:
> 
>   Dr. David Snelling <d.snelling@fle.fujitsu.com>
>   Fujitsu Laboratories of Europe
>   Hayes Park Central
>   Hayes End Road
>   Hayes, Middlesex  UB4 8FE
> 
>   +44-208-606-4649 (Office)
>   +44-208-606-4539 (Fax)
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> 
> 
> 
> 

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