- From: Benjamin Hawkes-Lewis <bhawkeslewis@googlemail.com>
- Date: Wed, 15 Dec 2010 12:01:37 +0000
- To: Steve Faulkner <faulkner.steve@gmail.com>
- Cc: Richard Schwerdtfeger <schwer@us.ibm.com>, public-html@w3.org, HTML Accessibility Task Force <public-html-a11y@w3.org>, Sam Ruby <rubys@us.ibm.com>
On Wed, Dec 15, 2010 at 10:35 AM, Steve Faulkner <faulkner.steve@gmail.com> wrote: > hi benjamin, >>The change proposal claims it is "impractical" for "a user agent >>or an assistive technology to create their own set of heuristics for >>determining if a table is to be used for layout". > > It is true that SOME assitive technology have implemented heuristics > to detect what they think are layout tables, this sometimes does not > work correctly (in my experience testing web sites and web > applications) and it also sometimes falsely hides data tables. Indeed. Given unannotated layout tables aren't going anywhere, and given the limited development resources at the disposal of accessibility concerns, I think the poverty of these independently implemented heuristics is a strong argument for optimizing and then standardizing them, just as the poverty of reverse engineered tag soup parsing was a strong argument for optimizing and then standardizing it. But that's perhaps orthogonal to this change proposal. > you state "Multiple user agents" have heauristics, which of the major > browsers have such heusristics implemented? At least Gecko, WebKit. http://mxr.mozilla.org/mozilla-central/source/accessible/src/html/nsHTMLTableAccessible.cpp https://trac.webkit.org/browser/trunk/WebCore/accessibility/AccessibilityTable.cpp -- Benjamin Hawkes-Lewis
Received on Wednesday, 15 December 2010 12:03:13 UTC