Re: [bp-i18n-specdev] Editorial comments on character definitions

CSS terms.

Typographic character unit https://drafts.csswg.org/css-text-3/#typographic-character-unit
> For text layout, we will refer to the typographic character unit as the basic unit of text. Even within the realm of text layout, the relevant character unit depends on the operation. For example, line-breaking and letter-spacing will segment a sequence of Thai characters that include U+0E33 THAI CHARACTER SARA AM differently; or the behaviour of a conjunct consonant in a script such as Devanagari may depend on the font in use. So the typographic character represents a unit of the writing system— such as a Latin alphabetic letter (including its diacritics), Hangul syllable, Chinese ideographic character, Myanmar syllable cluster— that is indivisible with respect to a particular typographic operation (line-breaking, first-letter effects, tracking, justification, vertical arrangement, etc.). 

Typographic letter unit (letter) https://drafts.csswg.org/css-text-3/#typographic-letter-unit
> A typographic letter unit or letter for the purpose of this specification is a typographic character unit belonging to one of the Letter or Number general categories in Unicode. [UAX44] See Character Properties for how to determine the Unicode properties of a typographic character unit. 

-- 
GitHub Notification of comment by r12a
Please view or discuss this issue at https://github.com/w3c/bp-i18n-specdev/issues/28#issuecomment-411765258 using your GitHub account

Received on Thursday, 9 August 2018 13:53:09 UTC