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Re: SOAP: Query regarding different infoset realisations.

From: <noah_mendelsohn@us.ibm.com>
Date: Wed, 22 Aug 2007 12:08:23 -0400
To: harbhanu@huawei.com
Cc: ranjit@huawei.com, xml-dist-app@w3.org
Message-ID: <OFC2115732.62C00549-ON8525733F.0057CBE5-8525733F.0058481F@lotus.com>
You are correct that in principle SOAP envelopes can be transmitted in a 
wide variety of forms, and that for interoperability there is a need to 
know in advance what those form(s) will be.  In SOAP, this is addressed 
primarily by having the specifications for having particular SOAP Protocol 
Bindings [1] document the particular representation used for the SOAP 
envelope.  In the case of SOAP 1.2, the binding included with the 
Recommendation is very widely deployed, and it specifies [2] that the 
envelope will be of media type application/soap+xml [3].  The 
specification for that media type says:  "This document defines the 
"application/soap+xml" media type which can be used to describe SOAP 1.2 
messages serialized as XML 1.0."  So, when you use the typical SOAP HTTP 
binding, the encoding is as an ordinary XML 1.0 document, transported 
using HTTP. 

Note that other representations can be used if the binding supports them. 
For example:  MTOM [4] provides for optimization of certain information 
that is better represented as large binary objects than as text.  When 
MTOM is used with the SOAP http binding, the HTTP Content-type is used to 
signal the use of the MTOM representation.


[1] http://www.w3.org/TR/soap12-part1/#transpbindframew

[2] http://www.w3.org/TR/soap12-part2/#httpmediatype

[3] http://www.ietf.org/rfc/rfc3902.txt

[4] http://www.w3.org/TR/soap12-mtom/

Noah Mendelsohn 
IBM Corporation
One Rogers Street
Cambridge, MA 02142

harbhanu <harbhanu@huawei.com>
Sent by: xml-dist-app-request@w3.org
08/22/2007 07:48 AM
Please respond to harbhanu
        To:     xml-dist-app@w3.org
        cc:     ranjit@huawei.com, (bcc: Noah Mendelsohn/Cambridge/IBM)
        Subject:        SOAP: Query regarding different infoset 

Hi all,
While going through the SOAP specification I found that SOAP specification 
always describes at the level of XML INFOSET
So, when I say that we receive a SOAP message that message can be an XML 
1.0 document, or any other XML Infoset representation (realization)….
My doubt is that how will the server specify the types of encoding (If I 
may say so, for different XML Infoset realization) that if supports.
Please let me know about your comments..

Received on Wednesday, 22 August 2007 16:08:23 UTC

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