[whatwg] [html5] r6895 - [ac] (0) Tweak hidden='''s definition a bit to be more consistent with likely us [...]
Silvia Pfeiffer
silviapfeiffer1 at gmail.com
Tue Jan 24 13:28:41 PST 2012
Could we add "video" to the list of aria-describedby elements that may
link to hidden text?
i.e. change
"..being referenced from the images that they describe"
to
"..being referenced from the images or videos that they describe" ?
IMO that would resolve several of the accessibility issues for the
video element, including poster-alt.
Cheers,
Silvia.
On Sat, Jan 14, 2012 at 9:11 AM, <whatwg at whatwg.org> wrote:
> Author: ianh
> Date: 2012-01-13 14:11:10 -0800 (Fri, 13 Jan 2012)
> New Revision: 6895
>
> Modified:
> complete.html
> index
> source
> Log:
> [ac] (0) Tweak hidden='''s definition a bit to be more consistent with likely usage scenarios.
> Affected topics: HTML
>
> Modified: complete.html
> ===================================================================
> --- complete.html 2012-01-13 01:42:12 UTC (rev 6894)
> +++ complete.html 2012-01-13 22:11:10 UTC (rev 6895)
> @@ -70442,9 +70442,11 @@
>
> <p>All <a href=#html-elements>HTML elements</a> may have the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> content attribute set. The <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute is a <a href=#boolean-attribute>boolean
> attribute</a>. When specified on an element, it indicates that
> - the element is not yet, or is no longer, relevant. <span class=impl>User agents should not render elements that have the
> - <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute
> - specified.</span></p>
> + the element is not yet, or is no longer, directly relevant to the
> + page's current state, or that it is being used to declare content to
> + be reused by other parts of the page as opposed to being directly
> + accessed by the user. <span class=impl>User agents should not
> + render elements that have the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute specified.</span></p>
>
> <div class=example>
>
> @@ -70485,9 +70487,15 @@
> <!-- for example, "<a hidden href=#content>Skip to content</a>" would be inappropriate. -->
> <!-- (but only add that example if you first add some more good valid examples -->
>
> - <p>Elements that are not <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>
> - should not link to or refer to elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>.</p>
> + <p>Elements that are not themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> must not <a href=#hyperlink>hyperlink</a> to
> + elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. The <code title="">for</code> attributes of <code><a href=#the-label-element>label</a></code> and
> + <code><a href=#the-output-element>output</a></code> elements that are not themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> must similarly not refer to
> + elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. In both
> + cases, such references would cause user confusion.</p>
>
> + <p>Elements and scripts may, however, refer to elements that are
> + <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> in other contexts.</p>
> +
> <div class=example>
>
> <p>For example, it would be incorrect to use the <code title=attr-hyperlink-href><a href=#attr-hyperlink-href>href</a></code> attribute to link to a
> @@ -70495,12 +70503,17 @@
> attribute. If the content is not applicable or relevant, then there
> is no reason to link to it.</p>
>
> - <p>It would similarly be incorrect to use the ARIA <code title=attr-aria-describedby>aria-describedby</code> attribute to
> - refer to descriptions that are themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. Hiding a section means that it
> - is not applicable or relevant to anyone at the current time, so
> - clearly it cannot be a valid description of content the user can
> - interact with.</p>
> + <p>It would be fine, however, to use the ARIA <code title=attr-aria-describedby>aria-describedby</code> attribute to
> + refer to descriptions that are themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. While hiding the descriptions
> + implies that they are not useful alone, they could be written in
> + such a way that they are useful in the specific context of being
> + referenced from the images that they describe.</p>
>
> + <p>Similarly, a <code><a href=#the-canvas-element>canvas</a></code> element with the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute could be used by a
> + scripted graphics engine as an off-screen buffer, and a form
> + control could refer to a hidden <code><a href=#the-form-element>form</a></code> element using its
> + <code title=attr-fae-form><a href=#attr-fae-form>form</a></code> attribute.</p>
> +
> </div>
>
> <p>Elements in a section hidden by the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute are still active,
>
> Modified: index
> ===================================================================
> --- index 2012-01-13 01:42:12 UTC (rev 6894)
> +++ index 2012-01-13 22:11:10 UTC (rev 6895)
> @@ -70442,9 +70442,11 @@
>
> <p>All <a href=#html-elements>HTML elements</a> may have the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> content attribute set. The <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute is a <a href=#boolean-attribute>boolean
> attribute</a>. When specified on an element, it indicates that
> - the element is not yet, or is no longer, relevant. <span class=impl>User agents should not render elements that have the
> - <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute
> - specified.</span></p>
> + the element is not yet, or is no longer, directly relevant to the
> + page's current state, or that it is being used to declare content to
> + be reused by other parts of the page as opposed to being directly
> + accessed by the user. <span class=impl>User agents should not
> + render elements that have the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute specified.</span></p>
>
> <div class=example>
>
> @@ -70485,9 +70487,15 @@
> <!-- for example, "<a hidden href=#content>Skip to content</a>" would be inappropriate. -->
> <!-- (but only add that example if you first add some more good valid examples -->
>
> - <p>Elements that are not <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>
> - should not link to or refer to elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>.</p>
> + <p>Elements that are not themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> must not <a href=#hyperlink>hyperlink</a> to
> + elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. The <code title="">for</code> attributes of <code><a href=#the-label-element>label</a></code> and
> + <code><a href=#the-output-element>output</a></code> elements that are not themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> must similarly not refer to
> + elements that are <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. In both
> + cases, such references would cause user confusion.</p>
>
> + <p>Elements and scripts may, however, refer to elements that are
> + <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> in other contexts.</p>
> +
> <div class=example>
>
> <p>For example, it would be incorrect to use the <code title=attr-hyperlink-href><a href=#attr-hyperlink-href>href</a></code> attribute to link to a
> @@ -70495,12 +70503,17 @@
> attribute. If the content is not applicable or relevant, then there
> is no reason to link to it.</p>
>
> - <p>It would similarly be incorrect to use the ARIA <code title=attr-aria-describedby>aria-describedby</code> attribute to
> - refer to descriptions that are themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. Hiding a section means that it
> - is not applicable or relevant to anyone at the current time, so
> - clearly it cannot be a valid description of content the user can
> - interact with.</p>
> + <p>It would be fine, however, to use the ARIA <code title=attr-aria-describedby>aria-describedby</code> attribute to
> + refer to descriptions that are themselves <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code>. While hiding the descriptions
> + implies that they are not useful alone, they could be written in
> + such a way that they are useful in the specific context of being
> + referenced from the images that they describe.</p>
>
> + <p>Similarly, a <code><a href=#the-canvas-element>canvas</a></code> element with the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute could be used by a
> + scripted graphics engine as an off-screen buffer, and a form
> + control could refer to a hidden <code><a href=#the-form-element>form</a></code> element using its
> + <code title=attr-fae-form><a href=#attr-fae-form>form</a></code> attribute.</p>
> +
> </div>
>
> <p>Elements in a section hidden by the <code title=attr-hidden><a href=#the-hidden-attribute>hidden</a></code> attribute are still active,
>
> Modified: source
> ===================================================================
> --- source 2012-01-13 01:42:12 UTC (rev 6894)
> +++ source 2012-01-13 22:11:10 UTC (rev 6895)
> @@ -82362,10 +82362,12 @@
> title="attr-hidden">hidden</code> content attribute set. The <code
> title="attr-hidden">hidden</code> attribute is a <span>boolean
> attribute</span>. When specified on an element, it indicates that
> - the element is not yet, or is no longer, relevant. <span
> - class="impl">User agents should not render elements that have the
> - <code title="attr-hidden">hidden</code> attribute
> - specified.</span></p>
> + the element is not yet, or is no longer, directly relevant to the
> + page's current state, or that it is being used to declare content to
> + be reused by other parts of the page as opposed to being directly
> + accessed by the user. <span class="impl">User agents should not
> + render elements that have the <code
> + title="attr-hidden">hidden</code> attribute specified.</span></p>
>
> <div class="example">
>
> @@ -82408,10 +82410,18 @@
> <!-- for example, "<a hidden href=#content>Skip to content</a>" would be inappropriate. -->
> <!-- (but only add that example if you first add some more good valid examples -->
>
> - <p>Elements that are not <code title="attr-hidden">hidden</code>
> - should not link to or refer to elements that are <code
> - title="attr-hidden">hidden</code>.</p>
> + <p>Elements that are not themselves <code
> + title="attr-hidden">hidden</code> must not <span>hyperlink</span> to
> + elements that are <code title="attr-hidden">hidden</code>. The <code
> + title="">for</code> attributes of <code>label</code> and
> + <code>output</code> elements that are not themselves <code
> + title="attr-hidden">hidden</code> must similarly not refer to
> + elements that are <code title="attr-hidden">hidden</code>. In both
> + cases, such references would cause user confusion.</p>
>
> + <p>Elements and scripts may, however, refer to elements that are
> + <code title="attr-hidden">hidden</code> in other contexts.</p>
> +
> <div class="example">
>
> <p>For example, it would be incorrect to use the <code
> @@ -82420,14 +82430,20 @@
> attribute. If the content is not applicable or relevant, then there
> is no reason to link to it.</p>
>
> - <p>It would similarly be incorrect to use the ARIA <code
> + <p>It would be fine, however, to use the ARIA <code
> title="attr-aria-describedby">aria-describedby</code> attribute to
> refer to descriptions that are themselves <code
> - title="attr-hidden">hidden</code>. Hiding a section means that it
> - is not applicable or relevant to anyone at the current time, so
> - clearly it cannot be a valid description of content the user can
> - interact with.</p>
> + title="attr-hidden">hidden</code>. While hiding the descriptions
> + implies that they are not useful alone, they could be written in
> + such a way that they are useful in the specific context of being
> + referenced from the images that they describe.</p>
>
> + <p>Similarly, a <code>canvas</code> element with the <code
> + title="attr-hidden">hidden</code> attribute could be used by a
> + scripted graphics engine as an off-screen buffer, and a form
> + control could refer to a hidden <code>form</code> element using its
> + <code title="attr-fae-form">form</code> attribute.</p>
> +
> </div>
>
> <p>Elements in a section hidden by the <code
>
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