[Koha] some warnings during zebra indexing

[samuel desseaux]

Le 05/02/2013 18:53, Frédéric Demians a écrit :
>> /15:45:36-05/02 zebraidx(29319) [warn]
>> /etc/koha/zebradb/authorities/etc/dom-config-marc.xml: stylesheet
>> authority-zebra-indexdefs.xsl not found in path
>>
> /etc/koha/zebradb/authorities/etc:/etc/koha/zebradb/etc:/etc/koha/zebradb/marc_defs/unimarc/authorities:/etc/koha/zebradb/lang_defs/fr:/etc/koha/zebradb/xsl
>
> It means you have activated DOM indexing for authorities with a UNIMARC
> Koha. But authorities DOM indexing works for MARC21 but doesn't for
> UNIMARC. See bug 7421.
>
> Switch to GRS-1 for authorities indexing.
>

Ok , but how can i do it? Do i modify the koha-conf.xml or like this 
(http://wiki.koha-community.org/wiki/Switching_to_dom_indexing   and 
instead dom, i choose grs-1).