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Corrections to "A Syntax for Describing Media Feature Sets" (RFC2738)

IP.com Disclosure Number: IPCOM000003334D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 4 page(s) / 8K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

G. Klyne: AUTHOR

Abstract

In RFC 2533, "A Syntax for Describing Media Feature Sets", an expression format is presented for describing media feature capabilities using simple media feature tags.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 39% of the total text.

Network Working Group G. Klyne

Request for Comments: 2738 Content Technologies

Updates: 2533 December 1999

Category: Standards Track

Corrections to "A Syntax for Describing Media Feature Sets"

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 (1999). All Rights Reserved.

Abstract

In RFC 2533, "A Syntax for Describing Media Feature Sets", an

expression format is presented for describing media feature

capabilities using simple media feature tags.

This memo contains two corrections to that specification: one fixes

an error in the formal syntax specification, and the other fixes an

error in the rules for reducing feature comparison predicates.

Table of Contents

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

1.1 Terminology and document conventions 2

1.2 Discussion of this document 2

2. Correction to feature expression syntax .................3

3. Correction to feature set matching reduction rules ......3

4. Security Considerations .................................4

5. References ..............................................4

6. Author's Address ........................................4

7. Full Copyright Statement ................................5

1. Introduction

In RFC 2533, "A Syntax for Describing Media Feature Sets" [1], an

expression format is presented for describing media feature

capabilities using simple media feature tags. This provides a format

for message handling agents to describe the media feature content of

messages that they can handle. That memo also describes an algorithm

for finding the common capabilities expressed by two different

feature expressions.

This memo contains two corrections to that specification: one fixes

an error in the formal syntax specification, and the other fixes an

error in the feature set matching algorithm, in the rules for

reducing feature comparison predicates.

The first of these corrections affects the normative content of RFC

2533; the second affects non-normative content.

1.1 Terminology and document conventions

This specification uses syntax notation and conventions described in

RFC 2234, "Augmented BNF for Syntax Specifications: ABNF" [2].

NOTE: Comments like this provide additional nonessential

information about the rationale behind this document. Such

information is not needed for building a conformant

implementation, but may help those who wish to understand the

design in grea...