MBOX-Line: From alexey.melnikov at isode.com  Mon Sep 10 11:33:51 2012
To: imap-protocol@u.washington.edu
From: Alexey Melnikov <alexey.melnikov@isode.com>
Date: Fri Jun  8 12:34:48 2018
Subject: [Imap-protocol] Comparators?
In-Reply-To: <25F5C770-A983-40E7-A075-87A27449240F@iki.fi>
References: <25F5C770-A983-40E7-A075-87A27449240F@iki.fi>
Message-ID: <504E328F.7030000@isode.com>

Hi Timo,

On 10/09/2012 17:33, Timo Sirainen wrote:
> http://www.iana.org/assignments/collation/collation-index.html
>
> Looks like there aren't many comparators. I guess there aren't any other such lists either by other organizations?
I am not aware of any.

The only other comparator which is not registered that was discussed 
recently is a numeric one which can also handle negative integers.
> I'm mainly wondering how to add support for languages where the acutes/graves in letters should be ignored by searches.
If you write it down, I will review and can find other reviewers. I 
don't think this is the first time this was proposed, so maybe there is 
some utility in it.
> I guess I could simply add some kludgy setting for that, but then I shouldn't be advertising I18NLEVEL=1 anymore, because i;unicode-casemap is no longer being used as the default comparator..
>
> Also full text search indexes make the matter of changing comparators or using multiple comparators more-or-less impossible. Of course I18NLEVEL=2 requires that i;unicode-casemap must be one of the available comparators, so I couldn't advertise that either.


