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Re: Establishing minimal set of information requirements for UA/AT communication

From: Ian B. Jacobs <ij@w3.org>
Date: Thu, 04 Apr 2002 18:21:22 -0500
Message-ID: <3CACDFF2.7030305@w3.org>
To: Catherine Laws <claws@us.ibm.com>
CC: w3c-wai-ua@w3.org
Hi Cathy,

Thanks for sending this information. I have a couple of
comments and questions below.

  - Ian

Catherine Laws wrote:

> Here is a list of information requirements that I believe need to be met to
> implement an AT like Home Page Reader:
> 
> 1. For each element (DOM node) as well as at the page and frame level, be
> able to:


[snip]

> - Determine it's containing structure (form, table, frame, page, etc)


Can you define containing structure? Does this mean:

  * The element whose semantics is to group a number of descendant
    elements?

  * The rendering of an element that, in two dimensions, encloses
    some other content?

In short: can this be determined from the markup language alone?

[snip]


 
> 3. Ability to find the process/window for and place keyboard focus on an
> embedded object or applet.


The binding between process and window is something that is likely
done at the OS level. In UAAG 1.0, we talk about "viewports".


> 4. The information and events from the APIs and DOMs must reflect the web
> document displayed (i.e. both must include error correction or not).
> 
> 5. Ability to select/highlight text, controls, and images at character
> offsets programmatically like you can select with a mouse.


UAAG 1.0 doesn't require any particular type of selection; it can
be text-only or text-and-images, etc. Our requirement is that, 
whatever the selection encompasses, that information be available
through the API.
-- 
Ian Jacobs (ij@w3.org)   http://www.w3.org/People/Jacobs
Tel:                     +1 718 260-9447
Received on Thursday, 4 April 2002 18:22:12 GMT

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