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RE: Representation header

From: Yves Lafon <ylafon@w3.org>
Date: Thu, 6 Nov 2003 17:17:31 +0100 (MET)
To: noah_mendelsohn@us.ibm.com
Cc: Anish Karmarkar <Anish.Karmarkar@oracle.com>, Mark Nottingham <mark.nottingham@bea.com>, Martin Gudgin <mgudgin@microsoft.com>, "Xml-Dist-App@W3. Org" <xml-dist-app@w3.org>
Message-ID: <Pine.GSO.4.58.0311061713360.27871@gnenaghyn.vaevn.se>

On Wed, 5 Nov 2003 noah_mendelsohn@us.ibm.com wrote:

> To meet our use cases, MTOM needs to be more than an optimization
> mechanism:  it must provide means of carrying MIME-typed information in a
> SOAP Infoset, and optionally indicating that the content in question is a
> cached representation of some Web Resource.  That aspect of MTOM is, IMO,
> completely independent of the optimization, or of any particular
> embodiment of the optimization as binary in multipart MIME.


> Yves Lafon writes:
> > All those metadata are transient and exists only
> > between two binding instances. If you sign it, then the
> > verification has to be done at the binding level and
> > not at the application level.
> With respect, I don't >think< so.   We are proposing attributes to go on
> content in the SOAP infoset.  Those attributes carry information about
> MIME types, and they represent a contract with (at least) whichever roles
> the headers target, or if in the body with the endpoint.  The fact that
> particular bindings may optimize on one hop or another is not the point, I
> think.

I shouldn't have used "All those metadata". I really meant that some
metadata are transient and invisible to the application when the message
is serialized (and, for example, sent to a mail server not 8-bit capable).

I fully agree that in most cases, the metadata are seen at the application
level and therefore should be in the SOAP infoset, this is the case when
we embed a "cached" version of a http URI.

(just sent that mail to clarify this to those not at the conf call)

Yves Lafon - W3C
"Baroula que barouleras, au tiéu toujou t'entourneras."
Received on Thursday, 6 November 2003 11:19:29 UTC

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