Re: Unicode 5.1, Egyptian Transliteration, and Fonts

At 10:14 +0000 2007-12-02, Charles wrote:
>Michael Everson wrote:
>
>  >2. U+0313 cannot be used for the Egyptological Yod because its case
>  >behaviour in Greek does not apply to Latin or Cyrillic. In Latin and
>  >Cyrillic, U+0313 sits atop both uppercase and lowercase letters. This
>  >happens in natural orthographies for minority languages.
>
>The same could be argued for U+0301 yet this already serves as the acute
>accent when used with Latin script, positioned above capital letters, and as
>the tonos or oxia accent when used with Greek script, positioned to the left
>of capital letters. Similarly U+0300 serves both as the Latin acute accent
>and the Greek varia accent. These combining marks also behave differently
>when used for Vietnamese. Script/Language dependent behaviour of combining
>accents is already a feature of Unicode, so U+0313 should be able to
>function as both the Greek spiritus lenis and as a diacritic for composing
>the Egyptological Yod when used with Latin script.

You have not understood.

u+0301 and U+0313 both sit in front of capital Greek letters and atop 
small Greek letters.

u+0301 and U+0313 both sit atop capital and small Latin letters.

The required behaviour is for something like U+0313 to sit in front 
of capital Latain letters and atop small Latin letters. U+0313 can't 
do that, since it already has a behaviour in Latin.

Language-tagging for "Egyptological transliteration" is not, I think, 
an option. The proposed solution, to use U+0486, works quite well.
-- 
Michael Everson * http://www.evertype.com