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RE: Higher-level support for SOAP extensions/modules

From: Jonathan Marsh <jmarsh@microsoft.com>
Date: Fri, 29 Mar 2002 09:04:45 -0800
Message-ID: <330564469BFEC046B84E591EB3D4D59C0554C958@red-msg-08.redmond.corp.microsoft.com>
To: <www-ws-desc@w3.org>
How about this wording?

"It must be possible to describe which SOAP features are offered or
required by an operation or a service."

> -----Original Message-----
> From: Keith Ballinger [mailto:keithba@microsoft.com]
> Sent: Thursday, March 28, 2002 7:46 PM
> To: Glen Daniels; www-ws-desc@w3.org
> Subject: RE: Higher-level support for SOAP extensions/modules
> 
> I agree that we need this requirement. In fact, WSDL 1.1 let's you put
> extensibility elements into the binding, and explicitly states that
you
> do not need to describe each header specifically.
> 
> -----Original Message-----
> From: Glen Daniels [mailto:gdaniels@macromedia.com]
> Sent: Thursday, March 28, 2002 3:57 AM
> To: 'www-ws-desc@w3.org'
> Subject: REQ: Higher-level support for SOAP extensions/modules
> 
> 
> Hi all!
> 
> Got up early this morning, and had a little time to read over the
> current requirements doc.  I was a bit dismayed not to find one of my
> pet issues there, namely the mechanism by which WSDL supports SOAP
> extensions... so, no time like the present to make a suggestion. :)
> 
> At present, it is possible with WSDL 1.1 to specify particular headers
> which should be included with particular messages.  This was, I
believe,
> a reasonable first stab at integrating headers with a description
> language, but it falls far short of being able to support the kind of
> rich semantic additions that are going to be coming down the line as
> SOAP extensions over the next few months/years.
> 
> Without going into too much detail, I'd like to see us require the
> ability to specify that a particular SOAP "module" is offered by, or
> required by, particular services or operations.  SOAP 1.2 (part 1, sec
> 3) discusses the concept of SOAP "features", which are semantic
> extensions named with a URI and implemented by either SOAP extensions
> (headers) or bindings.  Bindings already have a requirement for URI
> naming, and I'm attempting to push for extensions to do the same.
Once
> we have URIs for such things, it becomes possible to say something
like
> "this operation supports the
> 'http://www.w3.org/2002/06/reliable-message' extension", which would
> imply some set of headers/exchanges mandated by that specification.
> It's unclear to me as to whether we would require a schema description
> of every possible header which such an extension might produce, but
> that's another facet of this which we should discuss.
> 
> This is also a potentially complex issue in that it gets into
situations
> where messages that are not actually specified directly in the WSDL
may
> become part of the exchange due to the extension specs, but I think we
> need to figure this stuff out if we hope to live in a world with true
> "orthogonal extensibility" and some hope of negotiation/interop.
> 
> Thanks,
> --Glen
Received on Friday, 29 March 2002 12:05:16 GMT

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