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HTTP Remote Variant Selection Algorithm -- RVSA/1.0 (RFC2296)

IP.com Disclosure Number: IPCOM000002859D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 11 page(s) / 25K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Holtman: AUTHOR [+2]

Abstract

HTTP allows web site authors to put multiple versions of the same information under a single URL. Transparent content negotiation is a mechanism for automatically selecting the best version when the URL is accessed. A remote variant selection algorithm can be used to speed up the transparent negotiation process. This document defines the remote variant selection algorithm with the version number 1.0.

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 12% of the total text.

Network Working Group K. Holtman

Request for Comments: 2296 TUE

Category: Experimental A. Mutz

Hewlett-Packard

March 1998

HTTP Remote Variant Selection Algorithm -- RVSA/1.0

Status of this Memo

This memo defines an Experimental Protocol for the Internet

community. It does not specify an Internet standard of any kind.

Discussion and suggestions for improvement are requested.

Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1998). All Rights Reserved.

ABSTRACT

HTTP allows web site authors to put multiple versions of the same

information under a single URL. Transparent content negotiation is a

mechanism for automatically selecting the best version when the URL

is accessed. A remote variant selection algorithm can be used to

speed up the transparent negotiation process. This document defines

the remote variant selection algorithm with the version number 1.0.

TABLE OF CONTENTS

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

2 Terminology and notation...................................2

3 The remote variant selection algorithm.....................2

3.1 Input....................................................2

3.2 Output...................................................3

3.3 Computing overall quality values.........................3

3.4 Definite and speculative quality values..................5

3.5 Determining the result...................................6

4 Use of the algorithm.......................................7

4.1 Using quality factors to rank preferences................7

4.2 Construction of short requests...........................8

4.2.1 Collapsing Accept- header elements.....................8

4.2.2 Omitting Accept- headers...............................9

4.2.3 Dynamically lengthening requests.......................9

4.3 Differences between the local and the remote algorithm..10

4.3.1 Avoiding major differences............................11

4.3.2 Working around minor differences......................11

5 Security and privacy considerations.......................11

6 Acknowledgments...........................................12

7 References................................................12

8 Authors' Addresses........................................12

9 Full Copyright Statement..................................13

1 Introduction

HTTP allows web site authors to put multiple versions (variants) of

the same information under a single URL. Transparent content

negotiation [2] is a mechanism for automatically selecting the best

variant when the URL is accessed. A remote variant selection

algorithm can be used by a HTTP server to choose a best variant ...