- From: Shadi Abou-Zahra <shadi@w3.org>
- Date: Mon, 19 May 2014 18:29:41 +0200
- To: Wayne E Dick <wayneedick@gmail.com>, w3c-wai-eo@w3.org
On 19.5.2014 18:09, Wayne E Dick wrote: > I actually looked in HTML 4 and HTML 5 and the upper left cell is > ambigous. Since the next section is irregular tables, a brief > transition from simple tables to might simply explain the upper left > corner problem: > > Something like: > "You may wonder whether the <th> cell in the upper left corner is > interpreted as a row header or a column header. It could be both. The > answer is that the situation is ambiguous without using the "scope" > attribute of the <th> element. The next section on irregular tables will > cover how we resolve the upper left corner problem and other unusual > configurations using the attributes of <th> cells. Could be a brief note if it doesn't add too much clutter or complexity - I've not encountered too many people wondering about this issue :) Thanks, Shadi > Wayne > On 5/19/2014 1:48 AM, Bim Egan wrote: >> Hi Wayne, >> >> No, there's no de facto rule to say what direction the header in the top >> left corner covers. It is both directions equally. To my mind this means >> that most tables should use the scope attribute to ensure that screen >> readers are given the requisite information. However in practice this >> isn't >> going to happen, and while I'm fairly sick of hearing "January December" >> when moving into the last column of a calendar, in most cases the human >> will either be able to determine or guess why this happens and not >> believe >> that January is the header for the December cell. When headers are less >> predictable though, it can be a real issue. >> >> Cheers, >> >> Bim >> >> >> >> -----Original Message----- >> From: Wayne E Dick [mailto:wayneedick@gmail.com] >> Sent: 17 May 2014 01:28 >> To: w3c-wai-eo@w3.org >> Subject: Question about ambiguous scope >> Is the scope of upper left corner of a table ever >> unambiguous without a scope attribute? How does a program >> determine the scope upper left corner in any simple table >> without a scope attribute? Are there an HTML semantic >> rules that says it is column or row header? >> Wow, I never thought about this until this morning. What >> a nifty paradox. >> > > -- Shadi Abou-Zahra - http://www.w3.org/People/shadi/ Activity Lead, W3C/WAI International Program Office Evaluation and Repair Tools Working Group (ERT WG) Research and Development Working Group (RDWG)
Received on Monday, 19 May 2014 16:30:13 UTC