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RE: User Agent Types

From: Denis Anson <danson@miseri.edu>
Date: Wed, 23 Dec 1998 10:00:04 -0500
To: "'Charles McCathieNevile'" <charles@w3.org>, "'Jon Gunderson'" <jongund@staff.uiuc.edu>
Cc: <w3c-wai-ua@w3.org>
Message-ID: <000e01be2e88$80d00920$665ee0c7@denisans>
During the face-to-face, Ian showed us the categories of media that the
authoring guidelines used (I think it was authoring).  Would it not make
sense to use the same categories, and say "If you render this type of media,
you must provide these functionalities?"  The issues of screen size should
be managed by the functionalities, I'd think.  We might also want to think
about the issues of changing between media types: voice output, braille,
etc.  The idea would be that the functionality should be maintained, even
when rendered in different formats.

Perhaps, Ian could post the media types, or the link to them, and we could
go from there.

Denis Anson

-----Original Message-----
From: w3c-wai-ua-request@w3.org [mailto:w3c-wai-ua-request@w3.org]On
Behalf Of Charles McCathieNevile
Sent: Monday, December 21, 1998 1:58 PM
To: Jon Gunderson
Cc: w3c-wai-ua@w3.org
Subject: Re: User Agent Types


I think it is better to define functionalities rather than User Agent
Types. Otherwise these definitions are not especially helpful - Netscape,
and I believe MSIE, can be run with any default font which is avilable on
the system. Therefore they qualify as both kinds of visual. Unless there
is some exception made for Animated GIFs they also qualify as Multimedia.

On the other hand, where does a text-only browser like Lynx or W3 fit into
the picture, other than when they are underlying a speech or braille
output?

As a very rough first pass I would suggest that functionalities be divided
into:

text
images (including jpg, gif and animated gif)
video
audio (playing an audio format)

Under text i would have several sub-classes:
braille
speech (rendering text as speech)
visual rendering
static rendering, as in a printed page

--Charles McCathieNevile -  mailto:charles@w3.org
phone: * +1 (617) 258 0992 *  http://purl.oclc.org/net/charles
       **** new phone number ***
W3C Web Accessibility Initiative -  http://www.w3.org/WAI
545 Technology sq., Cambridge MA, USA

On Mon, 21 Dec 1998, Jon Gunderson wrote:

  I would like to propose the following types of user agent types, with the
  following definitiions:

  Proposed User Agent Type:
  Visual Standard (VS): Rendering of document text content on displays
  greater 640x480 resolution with default font sizes less than 48 point.
  Examples include mass market browsers like Microsoft Internet Explorer,
  Opera and Netscape navigator.

  Visual Restricted (VR): Rendering of document text content on displays
that
  a smaller than 640x480 or with default font sizes greater than 48 point
  font.  Examples include screen magnifiers like Zoomtext from AISquared and
  Magic from Henter-Joyce for people with visual impairments, and portable
  user agent technologies for the mass market.

  Multi-Media (MM): Rendering of audio, video or animations from file
formats
  that contain sampled or compressed sound, bit mapped video or image
  information.  Examples include wave, mpeg and avi files.

  Aural (A): Rendering of document text and alternative rendering of
non-text
  content using text-to-speech synthesis technology.  Examples include
screen
  reader like Jaws from Henter-Joyce and Outspoken from Alva when used with
a
  mass market browser and browsers developed for the visually impiared like
  pwWebSpeak, IBM Homereader and VPInfoNet.

  Braille (B): Rendering of document text and alternative rendering of
  non-text content using dynamic Braille display technology.  Examples
  include screen readers like Jaws from Henter-Joyce and Outspoken from Alva
  when used with a mass market browser.



  Jon Gunderson, Ph.D., ATP
  Coordinator of Assistive Communication and Information Technology
  Division of Rehabilitation - Education Services
  University of Illinois at Urbana/Champaign
  1207 S. Oak Street
  Champaign, IL 61820

  Voice: 217-244-5870
  Fax: 217-333-0248
  E-mail: jongund@uiuc.edu
  WWW:	http://www.staff.uiuc.edu/~jongund
  	http://www.als.uiuc.edu/InfoTechAccess
Received on Wednesday, 23 December 1998 10:27:55 GMT

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