On Media-Types, Content-Types, and related terminology
draft-bormann-core-media-content-type-format-04
Network Working Group C. Bormann
Internet-Draft Universität Bremen TZI
Intended status: Standards Track H. Birkholz
Expires: 26 August 2021 Fraunhofer SIT
22 February 2021
On Media-Types, Content-Types, and related terminology
draft-bormann-core-media-content-type-format-04
Abstract
There is a lot of confusion about media-types, content-types, and
related terminology.
This memo is an attempt at clearing it up, so we can use consistent
terminology in CoRE and related specifications. It also defines some
ABNF that can be used in these specifications.
Status of This Memo
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This Internet-Draft will expire on 26 August 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Media-Type . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Content-Type . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Content-Coding . . . . . . . . . . . . . . . . . . . . . . . 5
5. Content-Format . . . . . . . . . . . . . . . . . . . . . . . 5
6. Remaining ABNF . . . . . . . . . . . . . . . . . . . . . . . 6
7. Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . 6
8. Discussion . . . . . . . . . . . . . . . . . . . . . . . . . 7
9. Suggested usage . . . . . . . . . . . . . . . . . . . . . . . 7
9.1. COSE . . . . . . . . . . . . . . . . . . . . . . . . . . 7
9.2. SenML . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9.3. ... . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
11. Security Considerations . . . . . . . . . . . . . . . . . . . 8
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
12.1. Normative References . . . . . . . . . . . . . . . . . . 8
12.2. Informative References . . . . . . . . . . . . . . . . . 8
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in
BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
[RFC1590] introduced media types and their registration. That
document took MIME types from [RFC1521] and gave them a new name. At
that time, the term "media type" was often used just for the major
type ("text", "audio"), and what we call a media-type now was the
combination of a type and a subtype. This lives on in [RFC6838],
which does not even have an ABNF [RFC5234] production for media type.
[RFC6838]'s predecessor, [RFC4288], supplied the ABNF shown in
(Figure 1).
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| type-name = reg-name
| subtype-name = reg-name
|
| reg-name = 1*127reg-name-chars
| reg-name-chars = ALPHA / DIGIT / "!" /
| "#" / "$" / "&" / "." /
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