[Koha-devel] Sort by title. Based only on Title or also on Title-cover ?

[Tajoli Zeno]

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