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[Bug 11199] Need standard way to creating heading "streams"

From: <bugzilla@jessica.w3.org>
Date: Wed, 03 Nov 2010 16:12:17 +0000
To: public-html-a11y@w3.org
Message-Id: <E1PDfwf-0007lh-PF@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11199

--- Comment #5 from Tab Atkins Jr. <jackalmage@gmail.com> 2010-11-03 16:12:17 UTC ---
(In reply to comment #4)
> (In reply to comment #3)
> > (In reply to comment #2)
> > > (In reply to comment #1)
> > > > HTML5 defines an algorithm to extract an outline from a document based on
> > > > sectioning elements and headings.
> > > 
> > > So we have to rely on WAI-ARIA to define the structure (which stream is the
> > > main document etc..)?
> > 
> > There shouldn't be any need for additional structure or "streams".
> > 
> > The outline retains information about <nav>, etc.  Your user agent can choose
> > to present just the <nav> headings, separate from the main document headings,
> > all by itself.
> 
> That would be semantically incorrect. On a web page not everything is related
> to the content and it's important to make a distinction. For example, a
> breadcrumb heading (hidden in graphic user agent but available for screen
> reader to jump to it) does not belong in the content structure. For example:
> 
> h2 Breadcrumbs
> h1 History of writing
>     h2 Prehistoric writings
>     h2 Antiquity
>         h3 Witing in Ancient Egypt
>         h3 Writing in Ancient Greece
>         h3 Writing in the Roman Empire
>     h2 Medieval
> h2 Footer
> 
> Breadcrumb and Footer, are very useful heading allowing screen reader users to
> more easily access part of the page but they don't belong with the same heading
> structure.

...like I said, your user agent can choose to separate out some types of
headings for you automatically, if they occur in a <nav> or similar rather than
just part of the normal document structure.

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Received on Wednesday, 3 November 2010 16:12:21 GMT

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