[Koha-devel] Definition of Zebra indexes without bib1 att

[Mathieu Saby]

Hello

I thought it was mandatory for creating an index in Zebra to edit 3 
files (record.abs, ccl.properties, bib1.att).
cf http://wiki.koha-community.org/wiki/Understanding_Zebra_indexing

But I was surprised to find some indexes that are actually usable (in 
search menu) without any definition in bib1.att.
They are all related to UNIMARC coded information (fields 100/105/115/116):

video-mt 1=Video-mt
Video-mt video-mt
Graphics-type 1=Graphic-type
Graphics-support 1=Graphic-support
Type-Of-Serial 1=Type-Of-Serial
Frequency-code 1=Frequency-code
Regularity-code 1=Regularity-code
Material-type    1=Material-type
Literature-Code    1=Literature-Code
Biography-code    1=Biography-code
Illustration-code    1=Illustration-code

Could somebody gives me some light? Does that mean defining a numeric 
attribute in bib1.att is a good practice, but not technically mandatory?
Should this syntax be corrected?

Regards,
M. Saby

-- 
Mathieu Saby
Service d'Informatique Documentaire
Service Commun de Documentation
Université Rennes 2
Téléphone : 02 99 14 12 65
Courriel : mathieu.saby at univ-rennes2.fr