Re: Reading Systems and presentation of TOC

Hi all,

Just as a complement to George's email, note that Web-based reading systems would be able to implement a tree view widget on top of the Nav Doc list structure using ARIA; see the "Tree view" section of the WAI-ARIA Authoring Practices note, with the complete examples:

https://www.w3.org/TR/wai-aria-practices-1.1/#TreeView <https://www.w3.org/TR/wai-aria-practices-1.1/#TreeView>

I suppose publishers could also build that pattern in the EPUB directly, although I don't know if users would be surprised by a tree view instead of a regular list when the Nav Doc is rendered as a spine item; and the tree view implementation requires a bit of JS.

Best,
Romain.


> On 16 May 2019, at 17:31, George Kerscher <kerscher@montana.com> wrote:
> 
> Dear EPUB 3 CG,
>  
> I recently demoed a wonderful EPUB 3 title from Macmillan Learning. It is 595 pages and has over 700 entries in the TOC.
>  
> I believe reading systems should have the ability to expand and collapse items. Because the navdoc is nested lists, this should be possible. I have seen one of the reading systems do this.
>  
> It probably depends on the type of data structure the Reading System implementor  selects. I think a tree view provides for the ability to expand and collapse sub-branches of the tree.
>  
> I don’t know exactly where this fits, but it is a general usability issue, which has more of an impact on users of Assistive Technology like a screen reader. It just makes it easier  and faster to navigate the TOC. Of course the content provider needs to deliver the TOC as nested lists, but the RS needs to provide this functionality.
>  
>  
> Thoughts welcome.
>  
> Thought this would  be a good post for “Global Accessibility Awareness Day” (GAAD.
>  
> Happy GAAD
> George
>  
>  
>  
>  
>  
> George Kerscher Ph.D.
> -In our Information Age, access to information is a fundamental human right.
> Chief Innovations Officer, DAISY Consortium
> http://www.daisy.org <http://www.daisy.org/>
> Senior Advisor, Global Literacy, Benetech
> http://www.benetech.org <http://www.benetech.org/>
> President, International Digital Publishing Forum (IDPF) 
> http://www.idpf.org <http://www.idpf.org/>
> Member of the National Museum and Library Services  Board (IMLS)
> http://www.imls.gov <http://www.imls.gov/>
> Chair Steering Council Web Accessibility Initiative (WAI), a division of the W3C 
> http://www.w3c.org/wai <http://www.w3c.org/wai>
> Phone: +1 406/549-4687
> Cell:+1 406/544-2466 
> Email: kerscher@montana.com <mailto:kerscher@montana.com>