William_J_G Overington <wjgo underscore 10009 at btinternet dot com> wrote:
> Suppose that a a "special researcher's edition" of a wordprocessing > application or a desktop publishing application at start up looks in a > specified directory for a file with the following file name. > > pua_major.txt > > If pua_major.txt exists, then it is opened and it is searched for a PUA.RTL > assignment statement. If a PUA.RTL assignment statement is not found in the > file, it is taken as if the following had been included in the file. > > PUA.RTL=""; > ... Of all applications, a word processor or DTP application would want to know more about the properties of characters than just whether they are RTL. Line breaking, word breaking, and case mapping come to mind. I would think the format used by standard UCD files, or the XML equivalent, would be preferable to making one up: E100;ENGSVANYALI LETTER P;Lo;0;R;;;;;N;;;;; E101;ENGSVANYALI LETTER B;Lo;0;R;;;;;N;;;;; E102;ENGSVANYALI LETTER M;Lo;0;R;;;;;N;;;;; ... -- Doug Ewell | Thornton, Colorado, USA | RFC 5645, 4645, UTN #14 www.ewellic.org | www.facebook.com/doug.ewell | @DougEwell
