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Communicating Presentation Information in Internet Messages: The Content-Disposition Header (RFC1806)

IP.com Disclosure Number: IPCOM000004062D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 7 page(s) / 14K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Troost: AUTHOR [+2]

Abstract

This memo provides a mechanism whereby messages conforming to the [RFC 1521] ("MIME") specification can convey presentational information. It specifies a new "Content-Disposition" header, optional and valid for any [RFC 1521] entity ("message" or "body part"). Two values for this header are described in this memo; one for the ordinary linear presentation of the body part, and another to facilitate the use of mail to transfer files. It is expected that more values will be defined in the future, and procedures are defined for extending this set of values.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 21% of the total text.

Network Working Group R. Troost

Request for Comments: 1806 New Century Systems

Category: Experimental S. Dorner

QUALCOMM Incorporated

June 1995

Communicating Presentation Information in

Internet Messages:

The Content-Disposition Header

Status of this Memo

This memo defines an Experimental Protocol for the Internet

community. This memo does not specify an Internet standard of any

kind. Discussion and suggestions for improvement are requested.

Distribution of this memo is unlimited.

Abstract

This memo provides a mechanism whereby messages conforming to the

[RFC 1521] ("MIME") specification can convey presentational

information. It specifies a new "Content-Disposition" header,

optional and valid for any [RFC 1521] entity ("message" or "body

part"). Two values for this header are described in this memo; one

for the ordinary linear presentation of the body part, and another to

facilitate the use of mail to transfer files. It is expected that

more values will be defined in the future, and procedures are defined

for extending this set of values.

This document is intended as an extension to [RFC 1521]. As such, the

reader is assumed to be familiar with [RFC 1521], and [RFC 822]. The

information presented herein supplements but does not replace that

found in those documents.

1. Introduction

[RFC 1521] specifies a standard format for encapsulating multiple

pieces of data into a single Internet message. That document does not

address the issue of presentation styles; it provides a framework for

the interchange of message content, but leaves presentation issues

solely in the hands of mail user agent (MUA) implementors.

Two common ways of presenting multipart electronic messages are as a

main document with a list of separate attachments, and as a single

document with the various parts expanded (displayed) inline. The

display of an attachment is generally construed to require positive

action on the part of the recipient, while inline message components

are displayed automatically when the message is viewed. A mechanism

is needed to allow the sender to transmit this sort of presentational

information to the recipient; the Content-Disposition header provides

this mechanism, allowing each component of a message to be tagged

with an indication of its desired presentation semantics.

Tagging messages in this manner will often be sufficient for basic

message formatting. However, in many cases a more powerful and

flexible approach will be necessary. The definition of such

approaches is beyond the scope of this memo; however, such approaches

can benefit from additional Content-Disposition values and

parameters, to be defi...