2013/3/11 Richard Wordingham <[email protected]>: > On Mon, 11 Mar 2013 05:27:35 +0100 > Philippe Verdy <[email protected]> wrote: > >> 2013/3/10 Richard Wordingham <[email protected]>: > >> > If we unify U+00B7's three possible roles of (a) digraph breaker, >> > (b) ano teleia and (c) decimal point, we could have the following >> > scheme: > >> > (1) Before digit, use decimal point glyph; >> > (2) Else before letter, use digraph breaker glyph; > >> Note that this case 2 includes Catalan where it is more than just a >> digraph breaker (between two l/L), and where it plays a role similar >> to a diacritic for the letter (l/L) before it. This complicates things >> a bit when the letter before it is a capital L, because it will be >> typically be kerned into it (ecept possibly in cursive decorated >> fonts). > > Are you sure that's <U+004C, U+00B7> and not U+013F? They're not > canonically equivalent. I didn't see any kerning with Libreoffice's > default font.
Canonical equivalence is not an issue here. But it's a fact that encoded Catalan texts can use either U+013F or <U+004C, U+00B7> alternatively, and so they should be treated as equivalent in the Catalan collation (with a minor difference only exposed at the final code points level, but not seen at levels 1-3). And I don't see why <U+004C, U+00B7> should not be kerned and finally rendered exactly like U+013F, in a Catalan text (you need to activate language-specific features for Catalan : this kerning would be implemented as a positioning feature, with a contextual substitution that makes U+00B7 zero-width, or as a contextual ligaturing substitution rule transforming the pair into the same glyph id as U+013F, in that Catalan feature).
