21436 2013-03-29 17:24:15 +0000 @longdesc should, like @src, be a valid *non-empty* URL. 2013-04-10 03:29:39 +0000 1 1 1 Unclassified HTML WG HTML Image Description Extension unspecified PC All RESOLVED FIXED http://www.w3.org/TR/2013/WD-html-longdesc-20130312/#longdesc a11y, a11y_text-alt P2 normal --- 1 xn--mlform-iua chaals hans.hillen public-html-admin xn--mlform-iua public-html-bugzilla oldest_to_newest 85153 0 xn--mlform-iua 2013-03-29 17:24:15 +0000 PROPOSAL: Update the definition of the content of the @longdesc attribute to match the requirements for the @src attribute. CURRENT SITUATION: Referring to its definition in HTML5,[1] the HTML Image Description Extension spec currently says that the content of the @longdesc attribute MUST be: ]] a valid URL potentially surrounded by spaces [[ This definition, however, is too loose. For contrast, the definition of the img element’s @src attribute pointes to HTML5’s definition of 'a validt non-empty URL'.[2] Thus, @src is required to be: [3] ]] a valid non-empty URL potentially surrounded by spaces [[ WHY CURRENT SITUATION IS DANGEROUS: The consequence of the above is that the HTML5 validator whines if the @src attribute only contains the empty string (including the empty string surrounded by spaces) - which is nice. But, conversely, if the @longdesc attribute contains the empty string (potentially surrounded by spaces), the validator does (currently) not whine.[4] It is also worth mentioning that in the infamous Longdesc Lottery, then "is blank" (followed by "is not a valid URL"), is the first mentioned example of longdesc misuse.[5] When possible, the HTML Image Description Extension spec should demonstrate that it tries to avoid the issues that the Longdesc Lottery article takes up. [1] http://www.w3.org/html/wg/drafts/html/master/infrastructure.html#valid-url-potentially-surrounded-by-spaces [2] http://www.w3.org/html/wg/drafts/html/master/infrastructure.html#valid-non-empty-url [3] http://www.w3.org/TR/html5/embedded-content-0.html#attr-img-src [4] http://tinyurl.com/emptyLongdesc [5] http://blog.whatwg.org/the-longdesc-lottery 85159 1 xn--mlform-iua 2013-03-29 20:03:56 +0000 As part of this bug fix, please do as well replace the following text - this: ]] If a longdesc attribute has invalid content, [[ With the following text: ]] If the content of a longdesc attribute is not a <a href=" http://www.w3.org/html/wg/drafts/html/master/infrastructure.html#valid-non-empty-url " >valid non-empty-url</a> [[ 85182 2 chaals 2013-03-31 12:12:47 +0000 I agree. I'll update this in the next draft. (I thought I had this already, actually) 85489 3 chaals 2013-04-03 12:33:42 +0000 Fixed as of https://dvcs.w3.org/hg/html-proposals/raw-file/0dd2e510d4e1/longdesc1/longdesc.html