On 2017-04-01 16:07, Pablo Rodriguez wrote:
> Hans,
>
> I have just discovered the following:
>
>      \define[1]\indx{#1\index{#1}}
>      \starttext
>      \indx{an} \indx{american} \indx{Aphrodite}
>      \placeindex
>      \stoptext
>
> Lowercase letters are placed after its uppercase counterparts.
>
> I don’t have (almost) any experience with indices in ConTeXt, but which
> is the way to turn this off?
>
> Sorry, but I don’t see a reason to have this as default. I mean, I have
> never seen any encyclopedia or dictionary that sorts entries according
> to letter case.
>
I believe you want method=default for your \setupregister[index][] 
options. The allowable values appear to be default, first, last, before, 
and after. With nothing specified you do not get the same as specifying 
default. I asked about these a while back but got no answer. There is a 
cryptic explanation from 2010 at

http://www.mail-archive.com/ntg-context%40ntg.nl/msg50454.html.

-- 
Rik