Mixing scripts (Re: Unicode versions (Re: Criteria for exceptional characters))

[Mark Davis]

For general commentary on scripts, see
http://www.unicode.org/reports/tr24/
For the data associating script with code point, see
http://www.unicode.org/Public/UNIDATA/Scripts.txt
For a definition of mixing scripts, see
http://www.unicode.org/reports/tr39/#Mixed_Script_Detection
Mark

On 12/19/06, Harald Alvestrand <harald at alvestrand.no> wrote:
>
> Michael Everson wrote:
> > At 09:45 -0800 2006-12-18, Mark Davis wrote:
> >> I don't think it is necessary. If mixtures of scripts are not
> >> displayed (eg the user-agent flags them as discussed before), then
> >> they are not a problem. If mixtures of scripts *are* allowed, then
> >> there are so many other problems (eg with Cyrillic) that these pale
> >> in comparison.
> >
> > I do not understand why (apart from Japanese and Korean) the
> > possibility of mixing scripts is still being discussed as though it
> > were necessary. DON'T mix Syllabics with other scripts, and be done.
> We still have to sort out a definition of "script" that makes the
> statement "Don't mix scripts" an actionable statement.
>
> If we use the Unicode script names from the Unicode database's
> "Scripts.txt", 0-9 aren't in "Latin", they're in "Common".
> The combining accents are mostly in "Inherited".
>
> If, by "don't mix scripts", you mean "scripts Common, Inherited and X
> from unicode/Scripts.txt can be mixed in one string, for any value of X,
> but no other mixing is allowed", we can discuss that statement. But I'm
> not at all sure we're all talking about the same thing when we discuss
> the statement.
>
> Is there a list of the Unicode codepoints known to be used in each of
> the ISO 15924 script codes?
>
> Harald
>
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