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Updates:
Keywords: [--------|p], user agent, ua
Network Working Group T. Hansen
Request for Comments: 3938 AT&T Laboratories
Updates: 3458 October 2004
Category: Standards Track
Video-Message Message-Context
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2004).
Abstract
The Message-Context header defined in RFC 3458 describes the context
of a message (for example: fax-message or voice-message). This
specification extends the Message-Context header with one additional
context value: "video-message".
A receiving user agent (UA) may use this information as a hint to
optimally present the message.
1. Introduction
Email messages can be used to convey many different forms of
messages, and the user will interact with different types in
different ways. As explained in RFC 3458 [1], the "message context"
of the message conveys information about the way the user expects to
interact with the message, such as which icon to display. RFC 3458
then registers the message contexts for a "voice-message", "fax-
message", "pager-message", "multimedia-message", "text-message", and
"none".
Hansen Standards Track [Page 1]
RFC 3938 Video-Message Message-Context October 2004
2. Video Message
One form of email is a message that consists mostly of a video
stream. Examples of services that send video email are those
connected to cell phones that capture video streams, and video email
services that use webcams attached to a PC. These email messages
currently consist of two flavors, both of which can be properly
considered a video message:
1. those that embed the video stream internally within the message as
a body part, and
2. those whose video stream is stored on a third party's video
server.
However, none of the existing message contexts properly identify such
video messages. This specification extends the Message-Context
header with one additional context value: video-message.
3. IANA Considerations
3.1. Message-Context
As specified in RFC 3458 [1], this document registers "video-message"
in the "Internet Message Context Types" repository.
Message-Context class name:
video-message
Summary of the message class:
Indicates a message whose primary content is a video mail message.
The primary content is video data. The context is usually a
message recorded on a video camera, or a message whose primary
purpose is to contain an external reference to a message recorded
on a video camera.
Person & email address to contact for further information:
Tony Hansen, tony+msgctxt@maillennium.att.com.
4. Security Considerations
This header is intended to be an indicator of message context only.
As such, it is only a hint and requires no behavior on the part of a
message user agent.
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RFC 3938 Video-Message Message-Context October 2004
5. Normative References
[1] Burger, E., Candell, E., Eliot, C., and G. Klyne, "Message
Context for Internet Mail", RFC 3458, January 2003.
6. Author's Address
Tony Hansen
AT&T Laboratories
200 Laurel Ave.
Middletown, NJ 07748
USA
EMail: tony+msgctxt@maillennium.att.com
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RFC 3938 Video-Message Message-Context October 2004
7. Full Copyright Statement
Copyright (C) The Internet Society (2004).
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.
This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Intellectual Property
The IETF takes no position regarding the validity or scope of any
Intellectual Property Rights or other rights that might be claimed to
pertain to the implementation or use of the technology described in
this document or the extent to which any license under such rights
might or might not be available; nor does it represent that it has
made any independent effort to identify any such rights. Information
on the IETF's procedures with respect to rights in IETF Documents can
be found in BCP 78 and BCP 79.
Copies of IPR disclosures made to the IETF Secretariat and any
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attempt made to obtain a general license or permission for the use of
such proprietary rights by implementers or users of this
specification can be obtained from the IETF on-line IPR repository at
http://www.ietf.org/ipr.
The IETF invites any interested party to bring to its attention any
copyrights, patents or patent applications, or other proprietary
rights that may cover technology that may be required to implement
this standard. Please address the information to the IETF at ietf-
ipr@ietf.org.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
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