[NTG-context] formatting index entries: alphabetical order in Unicode

[Wolfgang Schuster]

Robert Zydenbos schrieb am 22.08.2019 um 01:42:
> I seem to have a problem with Unicode in the indexing function for my book: a word like āyitu (beginning with an 'a' with a macron over it) is considered a word that starts with a 'y'; the word īga (beginning with an i with a macron) is placed as if it is 'ga'.
>
> Is there any way to tell the indexing function how to deal with such special characters?
How should we know why you have problems with your index entries when 
you're unable to provide a working minimal example, all you have shown 
so far are snippets.

Wolfgang