W3C home > Mailing lists > Public > w3c-wai-ua@w3.org > April to June 2001

Re: [Issue 512] Seeking lower bound on text size requirement

From: Martin Duerst <duerst@w3.org>
Date: Tue, 22 May 2001 10:50:18 +0900
Message-Id: <>
To: Jon Gunderson <jongund@uiuc.edu>, Ian Jacobs <ij@w3.org>, clilley@w3.org
Cc: w3c-wai-ua@w3.org, w3c-i18n-ig@w3.org
Hello Jon,

Something pixel-based is necessary. Assume you have a device where
a pixel is 20pt (e.g. a projection screen). Defining 9pt as a minimum
is useless, because at the size of half a pixel, you can't write/read
anything. Also, even if your projector had a much higher resolution,
9pt would not work except for people very close to the screen (which
is not how projection is usually used).

pt is an absolute measure, like cm, inch, and so on (well, pt has some
minor variations, but that's largely irrelevant for this discussion).
If you are able to express the limit in pt, you can as well do it in
cm or mm. pt is not related to language, but to typographic tradition.
Some typographic traditions use other units, but there are conversion
factors, so it doesn't really matter.

Also, about control of the hardware: On most OSes, it's easier to
control pixels than to get access to the actual size of the screen.

Regards,   Martin.

At 08:38 01/05/21 -0500, Jon Gunderson wrote:
>I am not sure I would like a standard based on pixels, since this seems 
>too connected to the hardware which is typically not under the control of 
>the user agent developer.  Although a user agent developer could probably 
>calculate this information.  I would like to see something more in the 
>lines of point sizes, like 9 points as a minimum.
>Does the concept of point size translate to other languages?
>What terminology do non-Latin based languages use to indicate the size of 
>their characters when rendered by a compuer?
>Thanks for your help,

>Jon Gunderson, Ph.D., ATP
>Coordinator of Assistive Communication and Information Technology
>Division of Rehabilitation - Education Services
>College of Applied Life Studies
>University of Illinois at Urbana/Champaign
>1207 S. Oak Street, Champaign, IL  61820
>Voice: (217) 244-5870
>Fax: (217) 333-0248
>E-mail: jongund@uiuc.edu
>WWW: http://www.staff.uiuc.edu/~jongund
>WWW: http://www.w3.org/wai/ua
Received on Monday, 21 May 2001 21:51:24 UTC

This archive was generated by hypermail 2.4.0 : Friday, 17 January 2020 20:38:31 UTC