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Mechanism to support long descriptions of graphical and other material #193

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GoogleCodeExporter opened this issue Mar 24, 2015 · 9 comments
Closed

Mechanism to support long descriptions of graphical and other material #193

GoogleCodeExporter opened this issue Mar 24, 2015 · 9 comments
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Topic-ContentDocs The issue affects EPUB content documents Type-FeatureRequest The issue requests new functionality be added

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Issue:
The April 2011 referenced HTML specification has dropped the longdesc attribute 
from images, removing the ability to link to a long description for persons 
with disabilities. Although discussions are continuing on its re-inclusion, a 
mechanism that allows other elements to be described is needed.

The WAI has discussed introducing an ARIA attribute called described-at that 
would contain a URI referencing an external description resource. A reading 
system could use the referenced resource to provide the user options for 
presenting the information.

This mechanism would allow readers who require the description to access it 
without affecting the information presented on screen, but would not be 
available for use until ARIA 1.1 is released.

Current work around:
Embed the description below the graphical content in the EPUB 3 document.

EPUB solution:
Introduce the attribute EPUB:describedat for the next release.

Long term:
Track what HTML5 and ARIA does and follow their directions.

Original issue reported on code.google.com by mgarrish on 30 Oct 2011 at 11:48
@GoogleCodeExporter GoogleCodeExporter added auto-migrated Type-FeatureRequest The issue requests new functionality be added Topic-ContentDocs The issue affects EPUB content documents labels Mar 24, 2015
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[deleted comment]

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Note: First Public Working Draft (FPWD) of "HTML5 Image Description Extension"

http://lists.w3.org/Archives/Public/public-html-admin/2013Mar/0010.html

https://dvcs.w3.org/hg/html-proposals/raw-file/default/longdesc1/longdesc.html

Original comment by daniel.weck on 7 Mar 2013 at 11:25

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Resolved on 20130905 WG call. Using describedBy + proxy for now, and will 
revisit when/if ARIA 1.1 provides an alternative based on describedAt

Original comment by markus.g...@gmail.com on 19 Sep 2013 at 8:22

  • Changed state: Done

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Re-opening as ARIA 1.1 working draft is available:

http://www.w3.org/TR/wai-aria-1.1/

Original comment by mgarrish on 26 Sep 2013 at 8:10

  • Changed state: Accepted

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Specification has been updated to allow the aria-describedat attribute on any 
element:

https://code.google.com/p/epub-revision/source/detail?r=4768

Original comment by mgarrish on 14 Oct 2013 at 10:02

  • Changed state: FinalReview

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Original comment by markus.g...@gmail.com on 17 Oct 2013 at 8:10

  • Changed state: Done

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