It is sorting using the 'Title' index. Look at the URL in the OPAC, it contains sort_by=title_az.

Then look for title_az on C4/Search.pm. You will notice it does:

$sort_by .= "1=4 <i ";

and then if you look at bib1.att, you will see:

att 4 Title

So that's it.

Hope it helps.

2015-05-29 4:51 GMT-03:00 Tajoli Zeno <z.tajoli@cineca.it>:

Hi,

reading from etc/zebradb/marc_defs/marc21/biblios/biblio-koha-indexdefs.xml I see that from 245 $a are crerated two indexes:
Title and Title-cover:

<index_subfields tag="245" subfields="a">
<target_index>Title-cover:w</target_index>
<target_index>Title-cover:p</target_index>
<target_index>Title-cover:s</target_index>
<target_index>Title:w</target_index>
<target_index>Title:p</target_index>
<target_index>Title:s</target_index>
</index_subfields>

Sort by title (A-Z) and (Z-A) in opac are based only on 'Title' Zebra index or also on Title-cover ?
It is not clear for me.

Bye
Zeno Tajoli
_______________________________________________
Koha-devel mailing list
Koha-devel@lists.koha-community.org
http://lists.koha-community.org/cgi-bin/mailman/listinfo/koha-devel
website : http://www.koha-community.org/
git : http://git.koha-community.org/
bugs : http://bugs.koha-community.org/

Tomás Cohen Arazi

Prosecretaría de Informática

Universidad Nacional de Córdoba

✆ +54 351 5353750 ext 13168

GPG: B76C 6E7C 2D80 551A C765 E225 0A27 2EA1 B2F3 C15F