[contents]
     _________________________________________________________________
   
   W3C 
   
Non-W3C Technologies Techniques for Web Content Accessibility Guidelines 1.0

W3C Working Draft 23 June 2000

   This version:
          http://www.w3.org/WAI/GL/WD-WCAG10-NONW3C-TECHS-20000623
          (plain text, postscript, pdf, gzip tar file of HTML, zip
          archive of HTML)
          
   Latest version:
          http://www.w3.org/WAI/GL/WCAG10
          
   Previous version:
          http://www.w3.org/WAI/GL/WD-WCAG10-NONW3C-TECHS-20000615
          
   Editors:
          Wendy Chisholm, W3C,
          Gregg Vanderheiden, Trace R & D Center, University of Wisconsin
          -- Madison
          Ian Jacobs, W3C
          
   Copyright ©1999 - 2000 W3C® (MIT, INRIA, Keio), All Rights Reserved.
   W3C liability, trademark, document use and software licensing rules
   apply.
     _________________________________________________________________
   
Abstract

   This document describes techniques for satisfying the checkpoints of
   "Web Content Accessibility Guidelines 1.0" [WCAG10] when authoring
   with non-W3C technologies such as Flash and PDF.
   
   This document is part of a series of accessibility documents published
   by the Web Accessibility Initiative. "Techniques for Web Content
   Accessibility Guidelines 1.0" [WCAG10-TECHS] contains additional
   techniques and references for other formats and languages.
   
Status of this document

   While Web Content Accessibility Guidelines 1.0 strives to be a stable
   document (as a W3C Recommendation), the current document is expected
   to evolve as technologies change and content developers discover more
   effective techniques for designing accessible Web sites and pages.
   
   This is a W3C Working Draft for review by W3C Members and other
   interested parties. It is a draft document and may be updated,
   replaced or obsoleted by other documents at any time. It is
   inappropriate to use W3C Working Drafts as reference material or to
   cite them as other than "work in progress". This is work in progress
   and does not imply endorsement by, or the consensus of, either W3C or
   participants in the Web Content Accessibility Guidelines (WCAG)
   Working Group.
   
   This document has been produced as part of the W3C Web Accessibility
   Initiative. The goal of the Web Content Guidelines Working Group is
   discussed in the Working Group charter.
   
   A list of current W3C Recommendations and other technical documents
   can be found at http://www.w3.org/TR.
   
   Please send detailed comments on this document to w3c-wai-gl@w3.org.
   
Table of Contents

     * Abstract
     * Status of this document
     * 1 Macromedia Flash
          + 1.1 Static images
          + 1.2 Providing alternative images
     * 2 Adobe PDF
     * Acknowledgments
     * 3 References
     * 4 Resources
          + 4.1 Accessibility resources
     _________________________________________________________________
   
1 Macromedia Flash

  1.1 Static images
  
   Checkpoint in this section: 1.1.
   
   The Macromedia Flash Generator may create simple (non-interactive)
   animations or a static images to be included in an HTML document with
   the IMG element. An "alt" attribute is required per Checkpoint 1.1.
   
   To use Generator to dynamically output a .gif stream instead of a
   Flash stream, add the "type=" attribute with an appropriate value.
   
   Example:
 <IMG
src="http://path/flashtemplate.swt?type=gif&param1=val1&param2=val2
<http://path/flashtemplate.swt?type=gif&param1=val1&param2=val2> "
height="111" border="0" width="222" naturalsizeflag="1"
align="BOTTOM" alt="Description of the Image">

   Critical Elements: The "type=gif" parameter/value.
   
  1.2 Providing alternative images
  
   Checkpoint in this section:
     * 6.5 Ensure that dynamic content is accessible or provide an
       alternative presentation or page. [Priority 2]
       
   It is possible to determine (via Javascript) if the user has installed
   the Flash plug-in, and provide an alternative image if they have not.
   The following code is derived from code that was automatically
   generated by Flash 4. It is modified to merely trigger on the presence
   of the Flash plug-in.
   
   Example:
   
<!-- Image Map -->
<MAP NAME="AK"></MAP>
<SCRIPT LANGUAGE=JavaScript>
<!--
var UseFlash = 0;
if (navigator.mimeTypes && navigator.mimeTypes["application/x-shockwave-flash"]
 ) {
  // Check for Flash version 3 or greater in Netscape
  var plugin = navigator.mimeTypes["application/x-shockwave-flash"].enabledPlug
in;
  if (plugin && parseInt(plugin.description.substring(plugin.description.indexO
f(".")-1))>=3
)
    UseFlash = 1;
} else if (navigator.appName && navigator.appName.indexOf("Microsoft") != -1 &&
 navigator.userAgent.indexOf("Windows") != -1 && navigator.userAgent.indexOf("W
indows 3.1") == -1) {
   // Assume any Windows IE except for Windows 3.1 supports the
   // OBJECT tag UseFlash = 1;
}
if ( UseFlash ) {
   // Use Flash player
   // Although these alt tags do not apparently seem to be supported with the p
lug-in,
   // they are included on the chance they are supported in an upgrade
   document.write('<object width="400" height="400" alt="Object Map
   of Alaska" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ');
   document.write(' ');
   document.write(' WIDTHU0 HEIGHT35
   codebase="http://active.macromedia.com/flash2/cabs/swflash.cab#version=4,0,0
 ,0"
   id="AK">');
   //
   // the next 'document.write' line will need to be modified to point to your
   // file and to use your params
   //
   document.write('<param name="movie" value="http://path/flashtemplate.swt?par
am1=val1¶m2=
   val2 <http://path/flashtemplate.swt?param1=val1¶m2=val2> "><PARAM
   NAME=quality VALUE=high> <param name="bgcolor" value="#FFFFFF"> ');
   //
   // the next 'document.write' line will need to be modified to point to your
   // file and to use your params
   //
   document.write('<EMBED ALT="Embed Map of Alaska"
   src="http://path/flashtemplate.swt?param1=val1¶m2=val2
   <http://path/flashtemplate.swt?param1=val1¶m2=val2> " quality=high
   bgcolor=#FFFFFF ');
   document.write(' swLiveConnectúLSE WIDTHU0 HEIGHT35');
   document.write(' TYPE="application/x-shockwave-flash"
   PLUGINSPAGE="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_
   Version=ShockwaveFlash">');
   document.write('</EMBED>');
   document.write('</OBJECT>');
} else if (!(navigator.appName && navigator.appName.indexOf("Netscape")>=0
&& navigator.appVersion.indexOf("2.")>=0)) {
   // Netscape 2 will display the IMG tag below so don't write an extra one
   // You will need to modify the SRC param
   document.write('<img src="http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=
   val2<http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=val2> " alt="GIF
   Object Map of Alaska" WIDTHU0 HEIGHT35 border="0">
');
}
//-->
</SCRIPT>
// You will need to modify the SRC param as follows
<NOEMBED><IMG
SRC="http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=val2
<http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=val2> "
ALT="NOEMBED GIF Object Map of Alaska" WIDTHU0 HEIGHT35 usemap="#AK"
BORDER=0></NOEMBED>
// You will need to modify the SRC param as follows
<NOSCRIPT><IMG
SRC="http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=val2
<http://path/flashtemplate.swt?type=gif¶m1=val1¶m2=val2> "
ALT="NOSCRIPT GIF Object Map of Alaska" WIDTHU0 HEIGHT35 usemap="#AK"
BORDER=0></NOSCRIPT>
     _________________________________________________________________
   
2 Adobe PDF

   In the works...please stay tuned.
     _________________________________________________________________
   
Acknowledgments

   Web Content Guidelines Working Group Co-Chairs:
          Jason White, University of Melbourne
          Gregg Vanderheiden, Trace Research and Development
          
   W3C Team contact:
          Wendy Chisholm
          
   We wish to thank the following people who have contributed their time
          and valuable comments to shaping these guidelines:
          Harvey Bingham, Kevin Carey, Chetz Colwell, Neal Ewers, Geoff
          Freed, Al Gilman, Larry Goldberg, Jon Gunderson, Eric Hansen,
          Phill Jenkins, Leonard Kasday, George Kerscher, Marja-Riitta
          Koivunen, Josh Krieger, Chuck Letourneau, Scott Luebking,
          William Loughborough, Murray Maloney, Charles McCathieNevile,
          MegaZone (Livingston Enterprises), Masafumi Nakane, Mark Novak,
          Charles Oppermann, Mike Paciello, David Pawson, Michael Pieper,
          Greg Rosmaita, Liam Quinn, Dave Raggett, T.V. Raman, Robert
          Savellis, Jutta Treviranus, Steve Tyler, and Jaap van Lelieveld
          
   The original draft of this document is based on "The Unified Web Site
   Accessibility Guidelines" [UWSAG] compiled by the Trace R & D Center
   at the University of Wisconsin. That document includes a list of
   additional contributors.
   
3 References

   For the latest version of any W3C specification please consult the
   list of W3C Technical Reports at http://www.w3.org/TR.
   
   [WCAG10]
          "Web Content Accessibility Guidelines 1.0", W. Chisholm, G.
          Vanderheiden, and I. Jacobs, eds., 5 May 1999. This WCAG 1.0
          Recommendation is
          http://www.w3.org/TR/1999/WAI-WEBCONTENT-19990505.
          
   [WCAG10-TECHS]
          "Techniques for Web Content Accessibility Guidelines 1.0", W.
          Chisholm, G. Vanderheiden, I. Jacobs, eds. This document
          explains how to implement the checkpoints defined in "Web
          Content Accessibility Guidelines 1.0". The latest draft of the
          techniques is available at
          http://www.w3.org/WAI/GL/WCAG10-TECHS/.
          
4 Resources

   Note: W3C does not guarantee the stability of any of the following
   references outside of its control. These references are included for
   convenience. References to products are not endorsements of those
   products.
   
  4.1 Accessibility resources
  
   [UWSAG]
          "The Unified Web Site Accessibility Guidelines", G.
          Vanderheiden, W. Chisholm, eds. The Unified Web Site Guidelines
          were compiled by the Trace R & D Center at the University of
          Wisconsin under funding from the National Institute on
          Disability and Rehabilitation Research (NIDRR),  U.S. Dept. of
          Education.
          
   Level Triple-A conformance icon, W3C-WAI Web Content Accessibility
   Guidelines 1.0 
     _________________________________________________________________
   
   [contents]