- From: Leif Halvard Silli <xn--mlform-iua@xn--mlform-iua.no>
- Date: Thu, 28 Apr 2011 14:10:28 +0200
- To: Steve Faulkner <faulkner.steve@gmail.com>
- Cc: HTMLWG WG <public-html@w3.org>, HTML Accessibility Task Force <public-html-a11y@w3.org>
Steve Faulkner, Thu, 28 Apr 2011 12:12:41 +0100: > looking at the results from the Opera mama survey of web pages > > the Total analyzed URLs was 3,509,180 [1] > > the total number of pages containing a meta element with > name=generator was 942,051 > > so that appears to equate to missing alt will not be flagged as an > error on 37% of web pages. > Is this correct or have i missed something? It is correct: [A] ]] A conformance checker must report the lack of an alt attribute as an error unless one of the conditions listed below applies: [ snip ] * The document has a meta element with a name attribute whose value is an ASCII case-insensitive match for the string "generator". [[ In comparison, the WYSIWYG editor exception in the January 2008 version of the HTML5 draft, required a generator signature *ending* with the exact string "(WYSIWYG editor)". [B] Opera MAMA doesn't appear to have found a match for that string a single time. [C] Hence it was an opt-in for tool vendors. (PS: BlueGriffon's string matches the Jan/2008 draft, except that it doesn't use a parenthesis.) Note that the HTML5 validator so far never complain about omitted @alt. [D] > [1] http://dev.opera.com/articles/view/mama-the-url-set/ > [2] http://dev.opera.com/articles/view/mama-head-structure/#meta [A] http://dev.w3.org/html5/spec/embedded-content-1#guidance-for-markup-generators [B] http://www.w3.org/TR/2008/WD-html5-20080122/#wysiwyg2 [C] http://devfiles.myopera.com/articles/575/metagen-url.htm [D] http://validator.nu/?doc=http%3A%2F%2Fmat-t.com%2F -- leif halvard silli
Received on Thursday, 28 April 2011 12:13:55 UTC