[Athen] Placing long image descriptions within course materials.

[kerscher at montana.com]

Hello,

 

For published materials that have long descriptions, also called extended
descriptions, the two recommendations are to put the extended description
inside a HTML or XHTML details element, which can be expanded and collapsed.
The other recommendation is to have a link directly below the image to
another place in the publication. With this second type, there must also be
a back link to the exact location where you started.

 

These are tested at epubtest.org using the test book:

https://www.epubtest.org/books/Accessibility-Tests-Extended-Descriptions-v1.
1.1.epub 

 

Note now that NVDA and Jaws supports the aria-details attribute, we will
soon be updating the best practice to include this attribute in the image.
This alerts the reader that there is indeed a long description associated
with the image. If there is no aria-details, then the alt text is
sufficient.

 

Best

George

 

Oh, and you can go to epubtest.org to check out all the reading systems that
pass these tests, along with all the other test books, like support for
MathML.

 

Best

George

 

From: athen-list <athen-list-bounces at mailman12.u.washington.edu> On Behalf
Of Steve Green
Sent: Tuesday, July 5, 2022 5:40 AM
To: Access Technology Higher Education Network <athen-list at u.washington.edu>
Subject: Re: [Athen] Placing long image descriptions within course
materials.

 

My preference is to present the long description as visible text, so it
benefits everyone. However, most clients don't want to do that.

 

The next preference is to add the long description as hidden text behind the
chart or graph. It can be in a very small font if necessary, because no one
will ever see it.

 

Both approaches allow us to apply semantic structure such as headings, lists
or tables, which you cannot do with alt text. You can do this with Word and
PowerPoint. In principle you can do it with HTML too, but some CMSs and
content creation platforms will not let you. In both cases the image is
marked as decorative.

 

Unfortunately I can't share any examples because all our work is done for
our clients.

 

Steve Green

Managing Director

Test Partners Ltd

 

 

From: athen-list <athen-list-bounces at mailman12.u.washington.edu
<mailto:athen-list-bounces at mailman12.u.washington.edu> > On Behalf Of
Matthew Deeprose
Sent: 05 July 2022 12:18
To: 'Access Technology Higher Education Network'
<athen-list at u.washington.edu <mailto:athen-list at u.washington.edu> >
Subject: [Athen] Placing long image descriptions within course materials.

 

Hello colleagues

 

For complex images like charts and graphs, the W3C recommend writing long
descriptions. <https://www.w3.org/WAI/tutorials/images/complex/>  

 

I'm interested to learn how you deal with long image descriptions in course
materials, for example in PowerPoint and Word documents that are uploaded to
a Learning Management System like Blackboard / Canvas / Moodle etc. 

 

For example, if you write long descriptions do you use the alt text box, or
do you add it to speaker notes or a hidden slide (in PowerPoint), or an
appendix or supplementary document?

 

Does anyone have any examples to share of course content that includes long
descriptions of complex images?

 

I researched and delivered a presentation on this topic recently
<https://matthewdeeprose.github.io/alt-text-images-charts-graphs> , it uses
a number of worked examples on how to write long descriptions, I'm really
interested to learn some practical examples of how others are placing long
descriptions within course materials.

 

Thanks 

 

Matt

 

 

 

 

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Matthew Deeprose

He/Him/His <https://pronoun.is/he> 

Digital Learning <https://generic.wordpress.soton.ac.uk/digital-learning/> 

iSolutions

University of Southampton

 

JISC Community Chamption 2022
<https://www.jisc.ac.uk/news/celebrating-the-power-of-community-in-education
-and-research-01-mar-2022> 

EdTech Awards 2022 Finalist: Edtech author / speaker or podcaster
<https://www.edtechdigest.com/2022-finalists-winners/> 

My accessibility presentations, blog posts, and projects
<https://matthewdeeprose.github.io/> 

 



 

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