16572 2012-03-29 18:03:29 +0000 Meta generator: Validator must say that alt conformance check was skipped 2012-04-03 18:31:37 +0000 1 1 1 Unclassified HTML WG HTML5 spec unspecified PC All RESOLVED INVALID http://dev.w3.org/html5/spec/the-img-element.html#guidance-for-conformance-checkers a11y, a11y_text-alt P2 normal --- 1 xn--mlform-iua ian faulkner.steve laura.lee.carlson mike public-html-a11y public-html-admin public-html-wg-issue-tracking xn--mlform-iua public-html-bugzilla oldest_to_newest 66245 0 xn--mlform-iua 2012-03-29 18:03:29 +0000 Proposal: Add something like this to the spec: ]] Conformance checkers must allow users to separate pages for which @alt conformance check was performed, from pages (with the generator string) where it was not performed. [[ (The wording inspired from http://www.w3.org/TR/html5/obsolete#warnings-for-obsolete-but-conforming-features ) Use case - in 3 steps: 1 Author runs the following four documents through the validator: doc A with machine-checkable @alt errors + no meta generator string doc B w/error free machine-checkable @alt + no meta generator string doc C with machine-checkable @alt errors + meta generator string doc D w/error free machine-checkable @alt + meta generator string 2 Validation results: doc A: non-conforming due to @alt conformance error; doc B: conforming; doc C: conforming; doc D: conforming; 3 Author's response to the validation results: doc A: author fixes doc, validates anew and publishes; doc B, C and D: author is satisfied and publishes right away; Problems revealed in this use case: FIRSTLY, for document C and D, the validator fails to inform the author that the docs were subject to a less thorough @alt conformance check than document A and B. This means that the author is is right to believe that B/C/D are equally conformant and equally checked. SECONDLY, HTML5 is actually clear that doc D, is non-conforming, quote: ]] (This case does not represent a case where the document is conforming, only that the generator could not determine appropriate alternative text [[ Of course: That doc D is non-conforming, is not something that cannot be told, as long as the meta generator "exception" is in place. But it is the more important to give the user opportunity to understand that the reason for the lack of an error message, *might* simply be that the particualar issue was not checked for conformance. 66247 1 xn--mlform-iua 2012-03-29 18:29:25 +0000 Typo - this: "HTML5 is actually clear that doc D, is non-conforming" was meant to be "HTML5 is actually clear that doc _C_, is non-conforming. 66383 2 xn--mlform-iua 2012-04-03 18:31:37 +0000 Withdrawing.