You could link it via aria-describedby to whatever you are describing.
This way you have an explicit extended description.
Rich Schwerdtfeger
From: Deborah Kaplan <dkaplan@safaribooksonline.com>
To: Richard Schwerdtfeger/Austin/IBM@IBMUS
Cc: WAI Protocols & Formats <public-pfwg@w3.org>, DPUB-ARIA
<public-dpub-aria@w3.org>
Date: 11/05/2015 10:07 AM
Subject: Re: Proposal: remove aria-describedat from the ARIA 1.1
specification
On Thu, 5 Nov 2015, Richard Schwerdtfeger wrote:
> but I believe this addresses the requirements of
> the digital publishing industry.
One of our biggest concerns was that this extended description be
something that could be semantically identified AS an extended
description. Was this addressed in discussions at TPAC? Based on the
email that has gone by, I have not seen anything that will distinguish
extended descriptions in <details> elements from anything else in a
<details> element.
Deborah Kaplan
