RFC 1980 (rfc1980) - Page 1 of 7

A Proposed Extension to HTML : Client-Side Image Maps

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Network Working Group                                         J. Seidman
Request for Comments: 1980                                Spyglass, Inc.
Category: Informational                                      August 1996


         A Proposed Extension to HTML : Client-Side Image Maps

Status of this Memo

   This memo provides information for the Internet community.  This memo
   does not specify an Internet standard of any kind.  Distribution of
   this memo is unlimited.

Abstract

   The markup language known as "HTML/2.0" provides for image maps.
   Image maps are document elements which allow clicking different areas
   of an image to reference different network resources, as specified by
   Uniform Identifier (URIs).  The image map capability in HTML/2.0 is
   limited in several ways, such as the restriction that it only works
   with documents served via the "HTTP" protocol, and the lack of a
   viable fallback for users of text-only browsers.  This document
   specifies an extension to the HTML language, referred to as "Client-
   Side Image Maps," which resolves these limitations.

Table of Contents

   1.  Introduction ...............................................  1
       1.1  Purpose ...............................................  1
       1.2  Overall Operation .....................................  2
   2.  Client-Side Image Map Extension ............................  2
       2.1  Syntax ................................................  2
       2.2  Required Changes to HTML/2.0 DTD ......................  4
       2.3  Backwards Compatibility ...............................  5
       2.4  Examples ..............................................  5
   3.  Security Considerations ....................................  6
   4.  References .................................................  6
   5.  Author's Address ...........................................  7

1. Introduction

1.1  Purpose

   Image maps are an important feature of the point-and-click interface
   which makes the World Wide Web so popular. The most common use of
   image maps is to allow users to access different documents by
   clicking different areas in an image.




Seidman                      Informational
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