jim scripsit: > Unicode encodes U+1E20 and U+1E21 as combinations of lower and uppercase > _g_ with macron. The forms have canonical decomposition to _g_ or _G_ > followed by U+0304. This seems to rule out being able to consider a bar > above and a bar below as variants of the same character within Unicode.
True. But that doesn't mean that the glyph that a particular font uses for the sequence <g, COMBINING MACRON BELOW> can't have the bar above the g. This is a pure rendering question. > IPA specifications also indicate that U+0325 COMBINING RING BELOW and > some other diacritics normally placed beneath a character may instead be > displayed above a character for typographical reasons. So a smart IPA-specific font could render <g, U+0325> with the ring above. > But Unicode specifications currently say nothing about the possibility > of moving under-diacritics to an over-character position for > typographical reasons except for combination of _g_ and cedilla. Nothing needs to be said, because glyphs are not normative. > Perhaps we need instead special search folding between upper position > and lower position diacritics that are otherwise identical in form, > e.g. between U+0304 (COMBINING MACRON) and U+0331 (COMBINING MACRON > BELOW), between U+ 030A (COMBING RING ABOVE) and U+0325 (COMBINING RING > BELOW) and so forth for any diacritics where an upper form and a lower > form may have the same meaning. That also can be done as a collation tailoring. -- Principles. You can't say A is John Cowan <[EMAIL PROTECTED]> made of B or vice versa. All mass http://www.reutershealth.com is interaction. --Richard Feynman http://www.ccil.org/~cowan
