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Re: Issue 470: identifying XOP packages (revised proposal)

From: Graham Klyne <gk@ninebynine.org>
Date: Thu, 29 Jul 2004 09:01:28 +0100
Message-Id: <>
To: Mark Nottingham <mark.nottingham@bea.com>, XMLP Dist App <xml-dist-app@w3.org>
Cc: xmlp-comments@w3.org


This approach looks neat to me.

(It might be worth trying to get an early opinion from someone like Ned Freed.)


At 14:23 28/07/04 -0700, Mark Nottingham wrote:
>The Working Group today resolved to take a modified approach, outlined
>below, whereby the type parameter contains a content-type instead of a
>media type (i.e., it can contain parameters). This allows such
>parameters to "show through" both the root part's type parameter as
>well as the package's start-info parameter. It does mean that some
>escaping may be necessary, but that was thought an acceptable cost in
>exchange for the simplicity of the approach.
>If there are any concerns about this, please communicate them to the WG
>list (xml-dist-app@w3.org) by the end of this week; unless this
>happens, the WG will consider the resolution accepted.
>* Section 1.2 Example
>In Example 2, change:
>[[[Content-Type: Multipart/Related;boundary=MIME_boundary;
>[[[Content-Type: multipart/related;boundry=MIME_boundary;
>startinfo="application/soap+xml;action=\"http://www.example.com/ myAction\""]]]
>[[[Content-Type: application/soap_xop+xml; charset=UTF-8]]]
>[[[Content-type: application/xop+xml; charset=UTF-8;
>type="application/soap+xml;action=\"http://www.example.com/ myAction\""]]]
>* Section 3.1 Creating XOP Packages
>In bullet 5, change "appropriate XOP-specific media type" to
>"application/xop+xml media type"
>* Section 4.1 MIME Multipart/Related XOP Packages
>Replace the second paragraph with:
>"""The root MIME part is the root of the XOP Package, and MUST be a
>serialisation of the XOP Infoset using any W3C Recommendation-level
>version of XML (e.g., [XML 1.0], [XML 1.1]), and MUST be identified
>with a media type of "application/xop+xml" (as defined below). The
>"start-info" parameter of the package's media type MUST contain the
>content type associated with the content's XML serialisation (i.e., it
>will contain the same value as that of the root part's "type"
>* Section 5 Identifying XOP Packages
>Replace the section with: """
>XOP Documents, when used in MIME-like systems, are identified with the
>"application/xop+xml" media type, with the required "type" parameter
>conveying the original XML serialisation's associated content type.
>Note that when the type parameter contains reserved characters, it
>needs to be appropriately quoted and escaped.
>For example, a XOP Package using MIME Multipart/Related packaging to
>serialise a SOAP 1.2 message [SOAP1.2] with an action parameter of
>"http://www.example.com/foo" would label the package itself with the
>"multipart/related" media type; the root part's media type is
>"application/xop+xml", with a "type" parameter containing
>5.1 Registration
>MIME media type name:
>         application
>MIME subtype name:
>         xop+xml
>Required parameters:
>         * "type"
>         This parameter conveys the content type associated with the XML
>serialisation of the XOP Infoset, including parameters as appropriate.
>Optional parameters:
>         * "charset"
>         This parameter has identical semantics to the charset parameter of
>the application/xml media type as  specified in RFC 3023 [RFC 3023].
>Encoding Considerations:
>         Identical to those of application/xml as described in RFC 3023 [RFC
>3023], section 3.2.
>Security Consideration:
>         In addition to application-specific considerations, XOP has the 
> same
>security considerations described in RFC 3023  [RFC 3023], section 10.
>Interoperability Considerations:
>         There are no known interoperability issues.
>Published Specification:
>         This document.
>Applications which use this media type:
>         No known applications currently use this media type.
>Additional Information:
>         File extension:
>                 XOP
>         Fragment Identifiers:
>                 Identical to that of application/xml as described in 
> RFC3023 [RFC3023]
>         Base URI:
>                 As specified in RFC 3023 [RFC 3023], section 6.
>         Macintosh File Type code:
>                 TEXT
>Person and email address to contact for further information:
>         Mark Nottingham <mnot@pobox.com>
>Intended usage:
>         COMMON
>Author/Change controller:
>         The XOP specification is a work product of the World Wide Web
>Consortium's XML Protocol Working Group. The W3C has change control
>over this specification.
>Mark Nottingham   Principal Technologist
>Office of the CTO   BEA Systems

Graham Klyne
For email:
Received on Thursday, 29 July 2004 04:05:31 UTC

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