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The MIME Application/Vnd.pwg-multiplexed Content-Type (RFC3391)

IP.com Disclosure Number: IPCOM000010589D
Original Publication Date: 2002-Dec-01
Included in the Prior Art Database: 2002-Dec-20
Document File: 26 page(s) / 55K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Herriot: AUTHOR

Abstract

The Application/Vnd.pwg-multiplexed content-type, like the Multipart/Related content-type, provides a mechanism for representing objects that consist of multiple components. An Application/Vnd.pwg-multiplexed entity contains a sequence of chunks. Each chunk contains a MIME message or a part of a MIME message. Each MIME message represents a component of the compound object, just as a body part of a Multipart/Related entity represents a component. With a Multipart/Related entity, a body part and its reference in some other body part may be separated by many octets. With an Application/Vnd.pwg-multiplexed entity, a message and its reference in some other message can be made quite close by chunking the message containing the reference. For example, if a long message contains

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Network Working Group                                         R. Herriot

Request for Comments: 3391                                 December 2002

Category: Informational

         The MIME Application/Vnd.pwg-multiplexed Content-Type

Status of this Memo

   This memo provides information for the Internet community.  It does

   not specify an Internet standard of any kind.  Distribution of this

   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

IESG Note

   The IESG believes use of this media type is only appropriate in

   situations where the producer is fully aware of the capabilities and

   limitations of the consumer.  In particular, this mechanism is very

   dependent on the producer knowing when the consumer will need a

   particular component of a multipart object.  But consumers

   potentially work in many different ways and different consumers may

   need different things at different times.  This mechanism provides no

   means for a producer to determine the needs of a particular consumer

   and how they are to be accommodated.

   Alternative mechanisms, such as a protocol based on BEEP which is

   capable of bidirectional communication between the producer and

   consumer, should be considered when the capabilities of the consumer

   are not known by the producer.

Abstract

   The Application/Vnd.pwg-multiplexed content-type, like the

   Multipart/Related content-type, provides a mechanism for representing

   objects that consist of multiple components.  An

   Application/Vnd.pwg-multiplexed entity contains a sequence of chunks.

   Each chunk contains a MIME message or a part of a MIME message.  Each

   MIME message represents a component of the compound object, just as a

   body part of a Multipart/Related entity represents a component.  With

   a Multipart/Related entity, a body part and its reference in some

   other body part may be separated by many octets.  With an

   Application/Vnd.pwg-multiplexed entity, a message and its reference

   in some other message can be made quite close by chunking the message

   containing the reference.  For example, if a long message contains

Herriot                      Informational                      [Page 1]

RFC 3391                Application/Multiplexed            December 2002

   references to images and the producer does not know of the need for

   each image until it generates the reference, then

   Application/Vnd.pwg-multiplexed allows the consumer to process the

   reference to the image and the image before it consumes the entire

   long message.  This ability is important in printing and scanning

   applications.  This document defines the Application/Vnd.pwg-

   multiplexed content-type. It also provides examples of its use.

Table of Contents

   1. In...