5895 2008-07-24 07:53:33 +0000 Require attributes on <embed> and data-* attributes to be lowercase 2010-10-04 14:30:21 +0000 1 1 1 Unclassified HTML WG pre-LC1 HTML5 spec (editor: Ian Hickson) unspecified All All CLOSED FIXED P2 normal --- 1 zcorpan ian aaz hsivonen mike public-html-admin public-html-wg-issue-tracking shadow2531 public-html-bugzilla oldest_to_newest 21312 0 zcorpan 2008-07-24 07:53:33 +0000 For round-trippability and in order to avoid confusion with post-parsing mutations of attributes (the U12345 stuff), attributes on <embed> and data-* attributes should be required to be lowercase (in the ASCII range). This would also give authors less rope when trying mixed case for data-* attributes in text/html in markup and using the .dataset API. 21313 1 ian 2008-07-24 08:15:52 +0000 I don't understand what this would mean. How would I phrase this in such a way that authors who are writing HTML wouldn't think it applied to them? 21316 2 zcorpan 2008-07-24 11:11:12 +0000 It does apply to them, but only when using the .dataset API, since, AFAICT, it's case sensitive. No? <body data-foo=bar> alert(document.body.dataset.FOO); 21317 3 hsivonen 2008-07-24 13:37:42 +0000 (In reply to comment #1) > I don't understand what this would mean. How would I phrase this in such a way > that authors who are writing HTML wouldn't think it applied to them? Names of data-* attributes and attributes on the embed element must not contain upper-case ASCII letters. Note: It is impossible to violate this requirement in the text/html serialization. Thus, the requirement concerns the XML serialization and the DOM. 21342 4 ian 2008-07-25 21:07:41 +0000 I don't really like that but I'll figure something out I guess.