<Bob underscore Hallissy at sil dot org> wrote: > As has been mentioned previously on this list (and I would like to see > it added to http://www.unicode.org/faq/middleeast.html): > > This is not a reliable technique because not all Arabic characters > have a complete set of presentation forms encoded in Unicode. Ernst > Tremel mentioned on this list in February at least a few such: > > [list of missing small-v forms]
You are correct. This was just intended as a starting point for Nitin, who was previously under the impression that the underlying character had to change. > Presentation forms are no longer being added to Unicode. Thanks, I did know that. :-) > Modern rendering systems use additional data in the font (e.g., > OpenType, Graphite, or AAT tables) to indicate which glyph to use for > a given character in a given context, without dependence on > presentation form glyphs being "encoded" (i.e., given Unicode > codepoints) If Nitin had a "modern rendering system" to work with, he wouldn't have been asking these questions, because he already would have been getting the correct behavior. Non-modern systems that display a series of nominal glyphs when the user enters U+06xx characters are what cause users to invent their own techniques. -Doug Ewell Fullerton, California http://users.adelphia.net/~dewell/
