- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Mon, 7 Oct 2013 16:38:02 -0500
- To: Jeanne Spellman <jeanne@w3.org>
- Cc: UAWG <w3c-wai-ua@w3.org>
- Message-ID: <CA+=z1WkR8iLYsQ6vpf9DA1YSaFJcNBQm-nTBvp_uO+5yRXT_hg@mail.gmail.com>
References (for 1.4.3 in IER) http://www.w3.org/TR/CSS2/visudet.html#leading http://www.w3.org/wiki/CSS/Properties/line-height http://www.w3.org/TR/CSS2/text.html#spacing-props http://www.w3.org/TR/CSS2/fonts.html#font-styling http://www.w3.org/TR/CSS2/fonts.html#font-boldness http://www.w3.org/TR/CSS2/text.html#lining-striking-props http://www.w3.org/TR/CSS2/text.html#alignment-prop Table of all CSS properties http://www.w3.org/TR/CSS2/propidx.html adding a Note to 1.4.3 Note: The unit of measure will vary by the technology. For the purposes of UAAG 2.0, the font height should be considered to be equal to 1. The font width of the character M (or other character commonly accepted in the typography for that language) should be considered to be equal to 1. <jim in the note, 0 was confusing (as it is a zero, not an O), I changed to an M I added the word and character spacing, justification, bold, etc references> any other comments, additions, smithing??? On Fri, Oct 4, 2013 at 2:22 PM, Jeanne Spellman <jeanne@w3.org> wrote: > As per my action item, I followed up on the text customization proposal to > see what unit of measure was intended for 1.4.3 on line height (leading), > character and word spacing. > > Results: No unit of measure was specified deliberately, because no unit > of measure is proper usage. Examples were given of CSS and Word, which both > accept a number without a unit of measure. > > I personally disagree with this. While my typography experience is quite > dated, I have always used a unit of measure in typography. While this (no > unit of measure) is allowed in CSS, the examples make clear that CSS2 > considers no unit of measure as em. The calculation of line-height in CSS > 2.1 is quite complex, and I think we should avoid it ourselves, and refer > people to appropriate documentation. > http://www.w3.org/TR/CSS2/**visudet.html#leading<http://www.w3.org/TR/CSS2/visudet.html#leading> > > References (which I think we should include in the References section of > 1.4.3 IER) > http://www.w3.org/TR/CSS2/**visudet.html#leading<http://www.w3.org/TR/CSS2/visudet.html#leading> > http://www.w3.org/wiki/CSS/**Properties/line-height<http://www.w3.org/wiki/CSS/Properties/line-height>(some useful language here, IMO.) > Table of all CSS properties http://www.w3.org/TR/CSS2/**propidx.html<http://www.w3.org/TR/CSS2/propidx.html> > The spec for CSS3 is not complete and should not be referenced. The > latest working draft (for your info) is http://www.w3.org/TR/css3-** > text/#word-spacing <http://www.w3.org/TR/css3-text/#word-spacing> > > I propose adding a Note to 1.4.3 > Note: The unit of measure will vary by the technology. For the purposes of > UAAG 2.0, the font height should be considered to be equal to 1. The font > width of the character 0 (or other character commonly accepted in the > typography for that language) should be considered to be equal to 1. > > -- Jim Allan, Accessibility Coordinator & Webmaster Texas School for the Blind and Visually Impaired 1100 W. 45th St., Austin, Texas 78756 voice 512.206.9315 fax: 512.206.9264 http://www.tsbvi.edu/ "We shape our tools and thereafter our tools shape us." McLuhan, 1964
Received on Monday, 7 October 2013 21:38:26 UTC