- From: Ian Jacobs <ij@w3.org>
- Date: 2000年6月21日 17:48:31 -0400
- To: "Leonard R. Kasday" <kasday@acm.org>
- CC: w3c-wai-gl@w3.org
- Message-ID: <3951382F.FF471436@w3.org>
"Leonard R. Kasday" wrote: > > I just came across a page with a background image > > <body background="image.gif"> > > There was no ALT text... indeed there's no way to add alt text here. > > Backgrounds are often just decoration, but this one had actual textual > info. So we need a guideline. E.g. to > > 1. limit background images to pure decoration or > > 2. include any info in the background image in the text of the page, > possibly invisible text or Here's some discussion on this topic from June 1999, starting with a suggested clarification [1]: | I think the WG should strengthen a statement | in the guidelines that any important | content inserted by a style sheet be available in the | document source as well (rationale: device-independence, | users can override styles, etc.) The example given in that email is that W3C Recommendations use a background image in the upper left hand corner to indicate that they are Recommendations. This sounds like your issue. - Ian [1] http://lists.w3.org/Archives/Public/w3c-wai-gl/1999AprJun/0202.html > Of course, background is deprecated (cf > http://www.w3.org/TR/html4/struct/global.html#edef-BODY ) but that doesn't > help us now. > > Please tell me if I've missed something in the guidelines about this. I > know its there in spirit, but I don't see a literal reference in 1.1, which > states > > >For example, in HTML: > > Use "alt" for the IMG, INPUT, and APPLET elements, or provide a > > text equivalent in the content of the OBJECT > > and APPLET elements. > > For complex content (e.g., a chart) where the "alt" text does not > > provide a complete text equivalent, provide an > > additional description using, for example, "longdesc" with IMG or > > FRAME, a link inside an OBJECT element, or a > > description link. > > For image maps, either use the "alt" attribute with AREA, or use > > the MAP element with A elements (and other text) > > as content. > > Len > > -- > Leonard R. Kasday, Ph.D. > Institute on Disabilities/UAP, and > Department of Electrical Engineering > Temple University 423 Ritter Annex, Philadelphia, PA 19122 > > kasday@acm.org > http://astro.temple.edu/~kasday > > (215) 204-2247 (voice) (800) 750-7428 (TTY) > > The WAVE web page accessibility evaluation assistant: > http://www.temple.edu/inst_disabilities/piat/wave/ -- Ian Jacobs (jacobs@w3.org) http://www.w3.org/People/Jacobs Tel: +1 831 457-2842 Cell: +1 917 450-8783
Received on Wednesday, 21 June 2000 17:48:41 UTC