Philippe Verdy scripsit: > The question of Latin letters with two diacritics added in Latin Extension B > does not seem to respect this constraint, as it is not justifed in the > Vietnames VISCII standard that already does not contain characters with two > diacritics, but already composes them with two characters in the limited CCS > set.
I'm not sure what standard you are referring to. There are three standards for Vietnamese text: VISCII 1.1 (de facto), TCVN 5712-1 (aka VSCII-1), and TCVN 5712-2 (aka VSCII-2). VISCII provides no combining characters, fills the C1 space with graphics, and even replaces certain C0 characters with graphics. 5712-1 provides combining characters and fills the C1 space with graphics. 5712-2 provides combining characters and leaves both C0 and C1 clear of graphics (and so is ISO 2022-compatible). But all of them provide at least some characters with double diacritics. > I don't know why even ISO10646 would have needed them, unless there's some > Vietnamese DBCS standard that allows representing in a 94x94 matrix all > letters with two diacritics as well as Han ideographs used in Vietnamese. I very much doubt that any such encoding ever existed. -- What is the sound of Perl? Is it not the John Cowan sound of a [Ww]all that people have stopped [EMAIL PROTECTED] banging their head against? --Larry http://www.ccil.org/~cowan
