RFC 2938 (rfc2938) - Page 1 of 18
Identifying Composite Media Features
Alternative Format: Original Text Document
Network Working Group G. Klyne
Request for Comments: 2938 Content Technologies
Updates: 2533 L. Masinter
Category: Standards Track AT&T
September 2000
Identifying Composite Media Features
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 (2000). All Rights Reserved.
Abstract
In RFC 2533, an expression format is presented for describing media
feature capabilities as a combination of simple media feature tags.
This document describes an abbreviated format for a composite media
feature set, based upon a hash of the feature expression describing
that composite.
Table of Contents
1. Introduction ................................................2
1.1 Organization of this document ...............................2
1.2 Terminology and document conventions ........................2
2. Motivation and goals ........................................3
3. Composite feature representation ............................4
3.1 Feature set hashed reference format .........................5
3.1.1 Hash value calculation ......................................6
3.1.2 Base-32 value representation ................................7
3.2 Resolving feature set identifiers ...........................8
3.2.1 Query protocol ..............................................8
3.2.2 Inline feature set details ..................................9
4. Examples ...................................................10
5. Internationalization Considerations ........................12
6. Security Considerations ....................................13
7. Acknowledgements ...........................................13
8. References .................................................13
Klyne & Masinter Standards Track
