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Media Type Registration Procedure (RFC1590)

IP.com Disclosure Number: IPCOM000002424D
Original Publication Date: 1994-Mar-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 5 page(s) / 12K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Postel: AUTHOR

Abstract

Several protocols allow the use of data representing different "media" such as text, images, audio, and video, and within such media different encoding styles, such as (in video) jpeg, gif, ief, and tiff. The Multimedia Internet Message Extensions (MIME) protocol [1] defined several initial types of multimedia data objects, and a procedure for registering additional types with the Internet Assigned Numbers Authority (IANA). Several questions have been raised about the requirements and administrative procedure for registering MIME content-type and subtypes, and the use of these Media Types for other applications. This document addresses these issues and specifies a procedure for the registration of new Media Types (content- type/subtypes). It also generalizes the scope of use of these Media Types to make it appropriate to use the same registrations and specifications with other applications.

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Network Working Group J. Postel

Request for Comments: 1590 ISI

Updates: 1521 March 1994

Category: Informational

Media Type Registration Procedure

Status of this Memo

This memo provides information for the Internet community. This memo

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

this memo is unlimited.

Abstract

Several protocols allow the use of data representing different

"media" such as text, images, audio, and video, and within such media

different encoding styles, such as (in video) jpeg, gif, ief, and

tiff. The Multimedia Internet Message Extensions (MIME) protocol [1]

defined several initial types of multimedia data objects, and a

procedure for registering additional types with the Internet Assigned

Numbers Authority (IANA). Several questions have been raised about

the requirements and administrative procedure for registering MIME

content-type and subtypes, and the use of these Media Types for other

applications. This document addresses these issues and specifies a

procedure for the registration of new Media Types (content-

type/subtypes). It also generalizes the scope of use of these Media

Types to make it appropriate to use the same registrations and

specifications with other applications.

1. Introduction

RFC 1521 [1] defines a procedure for the registration of new data

types for use with the Multimedia Internet Message Extensions (MIME).

This registration mechanism was designed to make the identifiers for

a given data type available for use and to prevent naming conflicts.

With the growth of new multi-media protocols and access mechanisms,

this process has the promise of forming a unified general

registration service for Internet Protocols. These types, previously

called "MIME Types", are now called "Media Types".

The registration process for Media Types (content-type/subtypes) was

initially defined in the context of the asynchronous mail

environments. In this mail environment, there is a need to limit the

number of possible Media Types to increase the likelihood of

interoperability when the capabilities of the remote mail system are

not known. As Media Types are used in new environments, where the

proliferation of Media Types is not a hindrance to interoperability,

the original procedure is excessively restrictive and needs to be

generalized.

This document addresses the specific questions raised and provides an

administrative procedure for the registration of M...