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The Text/Plain Format and DelSp Parameters (RFC3676)

IP.com Disclosure Number: IPCOM000021965D
Original Publication Date: 2004-Feb-01
Included in the Prior Art Database: 2004-Feb-18
Document File: 21 page(s) / 43K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Gellens: AUTHOR

Abstract

This specification establishes two parameters (Format and DelSP) to be used with the Text/Plain media type. In the presence of these parameters, trailing whitespace is used to indicate flowed lines and a canonical quote indicator is used to indicate quoted lines. This results in an encoding which appears as normal Text/Plain in older implementations, since it is in fact normal Text/Plain, yet provides for superior wrapping/flowing, and quoting.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group R. Gellens

Request for Comments: 3676 Qualcomm

Obsoletes: 2646 February 2004

Category: Standards Track

The Text/Plain Format and DelSp Parameters

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). All Rights Reserved.

Abstract

This specification establishes two parameters (Format and DelSP) to

be used with the Text/Plain media type. In the presence of these

parameters, trailing whitespace is used to indicate flowed lines and

a canonical quote indicator is used to indicate quoted lines. This

results in an encoding which appears as normal Text/Plain in older

implementations, since it is in fact normal Text/Plain, yet provides

for superior wrapping/flowing, and quoting.

This document supersedes the one specified in RFC 2646, "The

Text/Plain Format Parameter", and adds the DelSp parameter to

accommodate languages/coded character sets in which ASCII spaces are

not used or appear rarely.

Table of Contents

1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . 2

2. Conventions Used in this Document . . . . . . . . . . . . . . 2

3. The Problem . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1. Paragraph Text. . . . . . . . . . . . . . . . . . . . . 3

3.2. Embarrassing Line Wrap . . . . . . . . . . . . . . . . 3

3.3. New Media Types . . . . . . . . . . . . . . . . . . . . 4

4. The Format and DelSp Parameters . . . . . . . . . . . . . . . 5

4.1. Interpreting Format=Flowed. . . . . . . . . . . . . . . 6

4.2. Generating Format=Flowed . . . . . . . . . . . . . . . 7

4.3. Usenet Signature Convention . . . . . . . . . . . . . . 9

4.4. Space-Stuffing . . . . . . . . . . . . . . . . . . . . 9

Gellens Standards Track [Page 1]

RFC 3676 Text/Plain Format and DelSp Parameters February 2004

4.5. Quoting . . . . . . . . . . . . . . . . . . . . . . . . 9

4.6. Digital Signatures and Encryption . . . . . . . . . . . 11

4.7. Examples. . . . . . . . . . . . . . . . . . . . . . . . 12

5. Interoperability. . . . . . . . . . . . . . . . . . . . . . . 12

6. ABNF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7. Failure Modes . . . . . . . . . . . . . . . . . . . . . . . . 14

7.1. Trailing White Space Corruption . . . . . . . . . . . . 14

8. Security Considerations . . . . . . . . . . . . . . . . . . . 15

9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15

10. Internationalization Considerations . . . . . . . . . . . . . 15

11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 15

12. Normative References. . . . . . . . . . . . . . . . . . . . . 16

13. Informative References. . . . . . . . . . . . . . . . . . . . 16

Appendix A: Changes from...