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Versions: 00 01 02 03 04 draft-mccobb-xv-media-type

Network Working Group                                          G. McCobb
Internet-Draft                                           IBM Corporation
Expires: Dec. 10, 2005                                     June 10, 2005


                XHTML+Voice - application/xhtml-voice+xml
                    draft-mccobb-xplusv-media-type-04


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Copyright Notice

   Copyright (C) The Internet Society (2005).  All Rights Reserved.

Abstract

   This document describes the registration of the MIME sub-type
   application/xhtml-voice+xml.  This sub-type is intended for use as a
   media descriptor for XHTML+Voice multimodal language documents.  The
   XHTML+Voice 1.2 language specification is maintained by the VoiceXML
   Forum at <http://www.voicexml.org/specs/multimodal/x+v/12/>.

1.  Conventions used in this document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in BCP 14, RFC 2119
   [RFC2119].



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2. Introduction

   XHTML+Voice is a member of the XHTML family of document types, as
   specified by XHTML Modularization [XHTMLMOD].  XHTML+Voice extends
   XHTML 1.1 [XHTML11] with a modularized subset of VoiceXML 2.0
   [VXML20], XML Events [XMLEVNTS], and a few extensions to both XHTML
   and VoiceXML 2.0.  XHTML 1.1, VoiceXML 2.0 and XML Events are W3C
   Recommendations.

   The language integration defined by XHTML+Voice supports all modules
   defined by XHTML Modularization, and adds voice interaction to XHTML
   elements to enable multimodal applications.  The defined document
   type for XHTML+Voice is XHTML Host language document type conformant.

   XHTML+Voice 1.2 [XPLUSV12] is maintained by the VoiceXML Forum, at
   URI location <http://www.voicexml.org/specs/multimodal/x+v/12/>.

2.1 application/xhtml-voice+xml Usage

   The application/xhtml-voice+xml media type is intended to be a media
   descriptor for XHTML+Voice multimodal documents. Multimodal browsers
   have special processing requirements for XHTML+Voice documents, such
   as running a voice browser component, and support for the DOM Level
   2 Event Model [DOM2EV] and XML Events [XMLEVNTS].

   This media type registration is not intended for e-mail usage.

3. IANA Registration

      To: ietf-types@iana.org
      Subject: Registration of Standard MIME media type
               application/xhtml-voice+xml

      MIME media type name: application

      MIME subtype name: xhtml-voice+xml

      Required parameters: none

      Optional parameters:

        charset:  has the same semantics as the charset parameter of the
                  "application/xml" media type specified in [RFC3023].

      Encoding considerations:
                  XHTML+Voice has the same media type encoding
                  considerations specified in section 3.2 of [RFC3023].

      Security considerations:


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   XHTML+Voice is an extension of XHTML and has the same security issues
   as XHTML.  These include interpreting anchors and forms in XHTML
   documents, and scripting languages and other dynamic interactive
   capabilities.  See section 7 of [RFC3236].

   In addition, the scripting language can be accessed by both the XHTML
   and the VoiceXML 2.0 markup embedded in the XHTML+Voice document.
   See section 1.3.1.5 of [XPLUSV12].

   XML-Events [XMLEVNTS] allows an author to attach a handler to any
   node in the document.  The handler that is activated in response to a
   specified event may be either a voice dialog or a script that can be
   either in the same or an external document.

      Interoperability considerations :

   Because XHTML+Voice is built upon W3C standard recommendations, it is
   designed to be interoperable across a wide range of platforms and
   client devices.  Because the extensions to XHTML are identified by
   their namespaces, all browsers that have namespace support can run an
   XHTML+Voice document as an XHTML document without voice interaction.

     Published specification:

         The latest published version of XHTML+Voice is [XPLUSV12].

      Applications which use this media type:

         XHTML+Voice documents are intended to be deployed on the World
         Wide Web and rendered by multimodal browsers that support the
         visual and voice modes of interaction.  Because XHTML+Voice is
         an application of XML, authors can expect XHTML+Voice user
         agents to be conformant XML 1.0 [XML] processors.  See section
         2 of [RFC3236].

      Additional information:

         Magic number(s):  There is no single string that is always
             present.
         File extension(s): mxml, xhvml, xvml, xvm
         Macintosh File Type Code(s): TEXT

      Person & e-mail address to contact for further information:

         Gerald M. McCobb
         mccobb@us.ibm.com

      Intended usage: LIMITED USE

      Author/Change controller: Gerald McCobb


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      Further information:

4. Fragment Identifiers

   See section 3 of [RFC3236].  Following [RFC3236], fragment
   identifiers for XHTML+Voice documents designate the element with the
   corresponding ID attribute value (see [XML] section 3.3.1).

   While XHTML+Voice adds new ID attributes with fragment identifier
   namespaces that are not in the same namespace as XHTML, uniqueness
   of the ID attribute values is preserved within the document.  See
   sections 1.3.1 and 5.3 of [XPLUSV12].

5. Recognizing XHTML+Voice files

   Because XHTML+Voice is XML, an XHTML+Voice document [optionally]
   starts with an XML declaration which begins with "<?xml" and has a
   DOCTYPE declaration "<!DOCTYPE html".  XHTML+Voice 1.2 has the
   following DOCTYPE declaration:

   <!DOCTYPE html PUBLIC "-//VoiceXML Forum//DTD XHTML+Voice 1.2//EN"
"http://www.voicexml.org/specs/multimodal/x+v/12/dtd/xhtml+voice12.dtd">

   Because XHTML+Voice is in the XHTML family of languages, the root
   element of an XHTML+Voice document is 'html' and '<html' can be found
   near the top of the document.

6. Security Considerations

   Security considerations for this media type are discussed in the MIME
   type registration that appears in section 3.

7. IANA Considerations

   As described in Section 3, this document specifies the registration
   of a MIME type for XHTML+Voice documents according to [RFC3023].

8. Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2396]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
              Resource Identifiers (URI): Generic Syntax", RFC 2396,
              August 1998.

   [RFC3023]  Murata, M., St. Laurent, S., and D. Kohn, "XML Media
              Types", RFC 3023, January 2001.



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   [RFC3236]  Baker, M., Stark, P., "The 'application/xhtml+xml' Media
              Type", RFC 3236, January 2002.

   [XML]      "Extensible Markup Language (XML) 1.0", W3C
              Recommendation.  Available at <http://www.w3.org/TR/REC-
              xml> (or <http://www.w3.org/TR/2000/REC-xml-20001006>).

   [XHTMLMOD] "Modularization of XHTML," 10 April, 2001, Murray Altheim,
              Frank Boumphrey, Sam Dooley, et al, W3C Recommendation,
              http://www.w3.org/TR/xhtml-modularization/

   [XHTML11]  "XHTML 1.1 - Module-based XHTML," 31 May 2001, Murray
              Altheim, Shane McCarron, W3C Recommendation,
              http://www.w3.org/TR/xhtml11/.

   [DOM2EV]   "Document Object Model Level 2 Events Specification,"
              Tom Pixley, 2000.  W3C Recommendation,
              http://www.w3.org/TR/DOM-Level-2-Events/.

   [XMLEVNTS] "XML Events - An events syntax for XML", Steven
              Pemberton, T. V. Raman, and Shane McCarron, 2002.  W3C
              Recommendation, http://www.w3.org/TR/xml-events/.

   [XPLUSV12] "XHTML+Voice Profile 1.2," 16 March 2004, J. Axelsson,
              et al, http://www.voicexml.org/specs/multimodal/x+v/12/

   [VXML20]   "Voice Extensible Markup Language (VoiceXML)," 16 March
              2004, Scott McGlashan et al, W3C Recommendation,
              http://www.w3.org/TR/voicexml20/.

9. Authors' Address

   Gerald M. McCobb
   IBM Corporation
   8051 Congress Avenue, Office 2019
   Boca Raton, Florida 33487
   USA

   Phone: +1-561-862-2109
   Fax:   +1-561-862-3922
   E-mail: mccobb@us.ibm.com


10. Full Copyright Statement

   Copyright (C) The Internet Society (2005).  This document is subject
   to the rights, licenses and restrictions contained in BCP 78, and
   except as set forth therein, the authors retain all their rights.




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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.















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