- From: Jim Allan <jimallan@tsbvi.edu>
- Date: Tue, 8 Oct 2013 09:59:42 -0500
- To: Jeanne Spellman <jeanne@w3.org>
- Cc: UAWG <w3c-wai-ua@w3.org>
- Message-ID: <CA+=z1Wk3TUZ2ZDo3RDFWX4fGmv4eZ48FFr0F61j2WwH+UVg4oA@mail.gmail.com>
All good for me. On Mon, Oct 7, 2013 at 5:06 PM, Jeanne Spellman <jeanne@w3.org> wrote: > I agree that 0 is confusing with O depending on the font, but 0 is a very > different width from M and that will put us in conflict with CSS which uses > 0. I am pretty sure that other technologies also use 0 as the defining > character for width. I suggest we put "0 (zero)" in the proposal. > > > On 10/7/2013 5:38 PM, Jim Allan wrote: > >> References (for 1.4.3 in 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> >> http://www.w3.org/TR/CSS2/**text.html#spacing-props<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-styling> >> http://www.w3.org/TR/CSS2/**fonts.html#font-boldness<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#lining-striking-props> >> http://www.w3.org/TR/CSS2/**text.html#alignment-prop<http://www.w3.org/TR/CSS2/text.html#alignment-prop> >> >> Table of all CSS properties http://www.w3.org/TR/CSS2/**propidx.html<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> >>> <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/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> >>> <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> >>> <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<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. >>> >>> >>> >> >> > -- > ______________________________**_ > Jeanne Spellman > W3C Web Accessibility Initiative > jeanne@w3.org > > -- 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 Tuesday, 8 October 2013 15:00:26 UTC