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[CSS2.1] WAI Issue 6: Collapse property for media types braille and embossed [DRAFT]

From: Gregory J. Rosmaita <oedipus@hicom.net>
Date: Tue, 11 Dec 2007 03:08:59 +0000
To: wai-xtech@w3.org, wai-liaison@w3.org
Message-Id: <20071211030715.M19226@hicom.net>

[Reviewer's Note: this post refers to the Candidate Recommendation draft 
of CSS 2.1,
http://www.w3.org/TR/2007/CR-CSS21-20070719
comments upon which are due by 20 December 2007]

There is a need for a collapse property for the tactile media type 
braille, so that a refreshable display wouldn't have to render what 
could be large chunks of blank space, and an embosser wouldn't have to 
waste valuable tactile real estate, but could -- as could the braille 
media type -- simply explicitly describe the blank space in the visual
and aural canvas, for example: "7 blank lines" or "empty block skipped".

display:inline; 
display:block; 
display:none; 

would then be visual media selectors; with display:none available to 
the author to paint to the aural canvas without "disturbing" the visual 
canvas. multiple use cases for exposing aurally what is not rendered 
visually, have already been advanced; for example, the use of 
display:none 
to convey orientational and contextualizing information in the aural 
canvas that doesn't "intrude" on the visual canvas.  This should be 
extended to the braille media type (orientation and contextualization 
for users of refreshable braille displays), whereas the embossed media 
type, would obey the display:none rules, as embossing is to the print 
media type as aural is to the braille media type.



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             Gregory J. Rosmaita, oedipus@hicom.net
  Camera Obscura: http://www.hicom.net/~oedipus/index.html
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Received on Tuesday, 11 December 2007 03:09:13 GMT

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