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Submission of the application/soap_xop+xml Media Mype

From: Yves Lafon <ylafon@w3.org>
Date: Wed, 21 Jul 2004 15:45:58 +0200 (MEST)
To: ietf-types@iana.org
Cc: xml-dist-app@w3.org, ietf-xml-mime@imc.org
Message-ID: <Pine.GSO.4.61.0407211536130.29505@gnenaghyn.vaevn.se>
The media type is defined in the W3C Last Call Working Draft of
"SOAP Message Transmission Optimization Mechanism" [1]
Below is a full text version for convenience. [2]
Please direct comments to xmlp-comments@w3.org.
Best regards,

[1] http://www.w3.org/TR/soap12-mtom/#media_type
A The application/soap_xop+xml Media Type
A.1 Introduction

SOAP version 1.2 ([SOAP Part 1] and [SOAP Part 2]) is a lightweight 
protocol intended for exchange of structured information between peers in 
a decentralized, distributed environment. It defines an extensible 
messaging framework that contains a message construct based on XML 
technologies that can be exchanged over a variety of underlying protocols.

The XML-binary Optimized Packaging Mechanism [XOP] is an alternate 
serialization of the XML Infoset, intended to make processing and 
representation of certain types of content (specifically, that which is 
base64-encoded) more efficient. Such serializations, when free-standing, 
are called XOP Packages; the portion of the XOP Package that represents 
the structure and non-optimized content of the Infoset are called XOP 
Documents, and are serialized as XML.

This appendix defines the media type application/soap_xop+xml which can be 
used to identify SOAP 1.2 message envelopes that have been serialized as 
XOP Documents using XML 1.0 ([XML 1.0]).

The application/soap_xop+xml media type explicitly identifies the XOP 
Document portion of a SOAP 1.2 message envelope, serialized as XML 1.0. In 
other words, it identifies the serialized XML after the extraction of any 
content into the XOP Package; it does not identify the package itself.

XOP Documents not serialized as XML 1.0 or representing message envelopes 
with a different SOAP namespace version MUST NOT use it.
A.2 Registration


       MIME media type name:


       MIME subtype name:


       Required parameters:


       Optional parameters:


             This parameter has identical semantics to the charset 
parameter of the application/xml media type as specified in RFC 3023 [RFC 


             This optional parameter can be used to specify the URI that 
identifies the intent of the message. In SOAP 1.2, it serves a similar 
purpose as the SOAPAction HTTP header field did in SOAP 1.1. Namely, its 
value identifies the intent of the message.

             The value of the action parameter is an absolute URI-reference 
as defined by RFC 2396 [RFC 2396]. SOAP places no restrictions on the 
specificity of the URI or that it is resolvable. Although the purpose of 
the action parameter is to indicate the intent of the SOAP message there 
is no mechanism for automatically computing the value based on the SOAP 
envelope. In other words, the value has to be determined out of band.

             It is recommended that the same value be used to identify sets 
of message types that are logically connected in some manner, for example 
part of the same "service". It is strongly RECOMMENDED that the URI be 
globally unique and stable over time.

             The presence and content of the action parameter MAY be used 
by servers such as firewalls to appropriately filter SOAP messages and it 
may be used by servers to facilitate dispatching of SOAP messages to 
internal message handlers etc. It SHOULD NOT be used as an insecure form 
of access authorization. Use of the action parameter is OPTIONAL. SOAP 
Receivers MAY use it as a hint to optimize processing, but SHOULD NOT 
require its presence in order to operate.

       Encoding considerations:

       Identical to those of application/xml as described in RFC 3023 [RFC 
3023], section 3.2, as applied to the SOAP envelope Infoset.

       Security considerations:

       Because SOAP can carry application defined data whose semantics is 
independent from that of any MIME wrapper (or context within which the 
MIME wrapper is used), one should not expect to be able to understand the 
semantics of the SOAP message based on the semantics of the MIME wrapper 
alone. Therefore, whenever using the application/soap_xop+xml media type, 
it is strongly RECOMMENDED that the security implications of the context 
within which the SOAP message is used is fully understood. The security 
implications are likely to involve both the specific SOAP binding to an 
underlying protocol as well as the application-defined semantics of the 
data carried in the SOAP message (though one must be careful when doing 
this, as discussed in SOAP 1.2 Part 1 [SOAP Part 1], 7.3.1 Binding to 
Application-Specific Protocols.

       Also, see SOAP 1.2 Part 1 [SOAP Part 1], 7. Security Considerations.

       In addition, as this media type uses the "+xml" convention, it 
shares the same security considerations as described in RFC 3023 [RFC 
3023], section 10.

       Interoperability considerations:

       There are no known interoperability issues.

       Published specification:

       SOAP 1.2 Part 1 [SOAP Part 1], SOAP 1.2 Part 2, [SOAP Part 2], and 

       Applications which use this media type:

       No known applications currently use this media type.

       Additional information:

             File extension:

             SOAP messages are not required or expected to be stored as 

             Fragment identifiers:

             Identical to that of application/xml as described in RFC 3023 
[RFC 3023], section 5.

             Base URI:

             As specified in RFC 3023 [RFC 3023], section 6. Also see SOAP 
1.2 Part 1 [SOAP Part 1], 6. Use of URIs in SOAP.

             Macintosh File Type code:


       Person and email address to contact for further information:

       Mark Nottingham <mnot@pobox.com>

       Intended usage:


       Author/Change controller:

       The SOAP 1.2 specification set is a work product of the World Wide 
Web Consortium's XML Protocol Working Group. The W3C has change control 
over these specifications.

Yves Lafon - W3C
"Baroula que barouleras, au tiéu toujou t'entourneras."
Received on Wednesday, 21 July 2004 09:59:41 UTC

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