- From: Gregg Vanderheiden via Post Office <po@trace.wisc.edu>
- Date: Wed, 28 Jan 1998 16:26:50 -0600
- To: "'GL - WAI Guidelines WG'" <w3c-wai-gl@w3.org>
The following Technical errors or omissions have been brought to our attention this week. Issue 1 Discussion: The guidelines provide an example of an image map in which the coordinates of the active regions are given in anchor elements, as permitted by HTML 4.0. This version of HTML also allows block-level content to be included in MAP. The example could be enriched by providing a more detailed description of the library within the MAP element, such as would appear from the image map (for example, a brief synopsis of the layout of certain facilities). Action: No action taken at this time. This is an excellant suggestion for the next version. References: http://lists.w3.org/Archives/Public/w3c-wai-gl/1998JanMar/0030.html Issue 2 Discussion: The guidelines suggest taking advantage of the media attribute of the LINK element to facilitate automatic retrieval of "text only" alternative documents, where these are deemed necessary. While I would not disapprove of this approach, I would emphasise that alternative pages should be avoided wherever possible. As Daniel has correctly stated on more than one occasion, the goal of the WAI is for there to be a single document which can be rendered in different media with equal success. In relation to the technical side of this proposal, the HTML 4.0 specification (at 6.13) defines a media type of "aural" for speech synthesizers, rather than "speech" as is incorrectly claimed in the guidelines. Also, to encompass all types of non-graphical devices, the MEDIA value should read: media="aural, braille, tty". Action: All references to "speech" were replaced with "aural." The cited example was changed to include braille and tty. The reference to the full list of media types was updated to include tv and handheld. References: http://lists.w3.org/Archives/Public/w3c-wai-gl/1998JanMar/0030.html -- ------------------------------ Gregg C Vanderheiden Ph.D. Professor - Human Factors Dept of Ind. Engr. - U of Wis. Director - Trace R & D Center gv@trace.wisc.edu http://trace.wisc.edu FAX 608/262-8848 For a list of our listserves send "lists" to listproc@trace.wisc.edu
Received on Wednesday, 28 January 1998 17:29:44 UTC