- From: Christophe Strobbe <strobbe@hdm-stuttgart.de>
- Date: Mon, 10 Feb 2014 11:37:05 +0100
- CC: "w3c-wai-gl@w3.org" <w3c-wai-gl@w3.org>, HTMLWG WG <public-html@w3.org>, HTML Accessibility Task Force <public-html-a11y@w3.org>
Hi, On 9/02/2014 16:10, James Nurthen wrote: > Steve, > The complete text is > "4.1.1 Parsing: In content implemented using markup languages, elements have complete start and end tags, elements are nested according to their specifications, elements do not contain duplicate attributes, and any IDs are unique, except where the specifications allow these features. " > > As you have stated, the html specification allows certain end tags to be optional and some have no end tags so there is no issue with 4.1.1 as the specification allows these features. Success Criterion 4.1.1 wanted to require certain markup characteristics that correspond well with XML's concept of well-formedness but without relying on that concept. This was before HTML5 became significant, and the criterion also had to work for HTML 4.01 without using obscure SGML concepts (and I don't mean the DTD). By the way, HTML 4.01 did not only make certain end tags optional but also certain start tags, i.e. on the elements HTML, HEAD, BODY and TBODY. And even in HTML 4.01, element such as IMG, INPUT, OPTION, COL, META, BR, AREA, LINK and HR were allowed to have an end tag; the SGML DTD here merely prohibited the presence of content between the start and end tag. (See <http://www.w3.org/TR/1999/REC-html401-19991224/sgml/loosedtd.html>. HTML 5 also allows the omission of start tags on certain elements: <http://www.w3.org/TR/html5/syntax.html#syntax-tag-omission>.) Best regards, Christophe > > Regards, > James > > > On Feb 9, 2014, at 5:58 AM, Steve Faulkner <faulkner.steve@gmail.com> wrote: > >> criteria 4.1.1 [1] parsing, requires complete start and end tags for all elements. >> >> "In content implemented using markup languages, elements have complete start and end tags" >> >> in HTML end tags certain end tags are optional [2] and certain elements have no end tags (<img>, <input> etc.) How do we explain/reconcile this disparity? >> >> >> >> [1] http://www.w3.org/TR/WCAG20/#ensure-compat >> >> [2] http://www.w3.org/html/wg/drafts/html/master/syntax.html#syntax-tag-omission: >> -- >> >> Regards >> >> SteveF >> HTML 5.1 >> -- Christophe Strobbe Akademischer Mitarbeiter Adaptive User Interfaces Research Group Hochschule der Medien Nobelstraße 10 70569 Stuttgart Tel. +49 711 8923 2749
Received on Monday, 10 February 2014 10:37:41 UTC