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Re: SVG Accessibility API Mapping Spec: Significant edits

From: Richard Schwerdtfeger <schwer@us.ibm.com>
Date: Thu, 25 Jun 2015 09:10:53 -0500
To: Amelia Bellamy-Royds <amelia.bellamy.royds@gmail.com>
Cc: public-svg-a11y@w3.org
Message-ID: <OF95A41E45.35CDE614-ON86257E6F.004D0559-86257E6F.004DE6BA@us.ibm.com>

Thanks Amelia. We are really glad to have you on the team.

aria-pressed is a state so it can change. However, if we want to have the
user agent do something automatically we would need to clearly specify how
that is done. ... What triggers aria-pressed to go away? What role is
applied that would allow aria-pressed to be used? Is aria-pressed the right
state to describe what is going on?

Is it a binding to animation that stops (does not look like it). ... Or is
it the act of the UI element becoming invisible. We are going to need to
establish rules for what is considered hidden automatically. Is opacity of
"0" an example and should it disappear from the accessibility tree? If it
disappears from the accessibility tree we won't care if it is pressed or
not as there will be no object to bind it to. Also, in these instances we
need to make sure that we do something that will work in all cases without


Rich Schwerdtfeger

From:	Amelia Bellamy-Royds <amelia.bellamy.royds@gmail.com>
To:	Richard Schwerdtfeger/Austin/IBM@IBMUS
Cc:	public-svg-a11y@w3.org
Date:	06/25/2015 08:52 AM
Subject:	Re: SVG Accessibility API Mapping Spec: Significant edits

What I have is still isolated to my fork of the repo (I don't have push
access to the ARIA repo).  You'll probably want to pull it in as a separate
branch, then you can edit away.

Regarding `aria-pressed`, the issue wasn't if the property was available,
it was whether you could change it with SMIL animation.  See this tutorial
of how to make an animated toggle button with SMIL.  Currently, to make it
ARIA-accessible, you'd need to use scripting to change the ARIA attributes:


On 25 June 2015 at 07:33, Richard Schwerdtfeger <schwer@us.ibm.com> wrote:
  Thank you Amelia.

  Addressing each bullet:

  - We do need to keep them synchronized but I can look at how we might
  reduce it. It is important that a user agent manufacturer be able to read
  this spec. and get the gist.
  - The issue with <desc> is it is not visible. Also, some platforms don't
  yet support access to structured text e.g. Mac, iOS. Even if it is
  structured, if structure is important then it should be visible to all
  users. For that we have aria-describedby but even that is limited by
  platforms that don't support description relationships.
  - I need to look at dat viz. This may be sticky issue with user agents.
  - tabindex on non rendered are ignored. They must not be exposed to AAPI
  - Role mappings that use of a generic ARIA role: One does not exist but
  we can create one. Most platforms expose the passed ARIA role. We could
  default to "graphicalobject" but I thought we agreed these would be
  symbols. I agree we should default to the new graphics roles.
  - aria-busy is a global attribute so we can put it anywhere we need to.
  We may wish to put something about aria-busy usage in this spec. or the
  ARIA specification. I am not following how aria-pressed applies.
  aria-pressed applies to toggle buttons typically as it reflects the
  pressed state.

  Do you want me to edit what you have or create a branch off your branch?
  I will take a look at what you have.

  Rich Schwerdtfeger

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Received on Thursday, 25 June 2015 14:11:27 UTC

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