[Koha] Mapping MARC21 to Advanced Search

[Rubén Fernández Asensio]

Thanks a lot for the hints!
As for language search, it turns out that its value is defined in the 
file /etc/koha/zebradb/ccl.properties thusly:

#Use                  Value Definition                      USMARC tag(s)
#-------------------- ----- ------------------------------ 
------------------
#
#Code-language          54  A code that indicates the       008/35-37, 041
#                           language of the item.
#                           The codes are defined by the
#                           target.
language 1=54
ln language

I experimented a bit and found that it is taken from field 008(35-37), 
but when set by field 041$a that value is overriden.

Also, it seems I can customize the Advance Search interface by editing 
file 
/usr/share/koha/opac/htdocs/opac-tmpl/bootstrap/en/modules/opac-advsearch.tt, 
and add a search for original language there.

Rubén

El 14/08/18 a les 15:48, Barton Chittenden ha escrit:
> 
> 
> On Mon, Aug 13, 2018 at 9:52 AM, Caroline Cyr-La-Rose 
> <caroline.cyr-la-rose at inlibro.com 
> <mailto:caroline.cyr-la-rose at inlibro.com>> wrote:
> 
>     In the manual, there is a kind of mapping section for searches that
>     gives you the indexes for each marc field:
>     https://koha-community.org/manual/18.05/en/html/searching.html#koha-search-indexes
>     <https://koha-community.org/manual/18.05/en/html/searching.html#koha-search-indexes>
> 
> 
>   If you want to see where the actual mapping between marc tags and 
> zebra index definitions occurs, take a look at the *-koha-indexdefs.xml 
> files.
> 
> ./normarc/biblios/biblio-koha-indexdefs.xml
> ./marc21/authorities/authority-koha-indexdefs.xml
> ./marc21/biblios/biblio-koha-indexdefs.xml
> ./unimarc/authorities/authority-koha-indexdefs.xml
> ./unimarc/biblios/biblio-koha-indexdefs.xml
> 
> Here's a snippit of biblio-koha-indexdefs.xml for marc21 -- 245$a has 
> the zebra indexes Title-cover:w, Title-cover:p, Title-cover:s, Title:w 
> and Title:p.
> 
> The part after the colon is the index type - w for 'word', p for 
> 'phrase' and ... I'm not sure what s is (my guess is 'exact *S*tring').
> 
>    <index_subfields tag="245" subfields="a">
>      <target_index>Title-cover:w</target_index>
>      <target_index>Title-cover:p</target_index>
>      <target_index>Title-cover:s</target_index>
>      <target_index>Title:w</target_index>
>      <target_index>Title:p</target_index>
>    </index_subfields>
>    <!--record.abs line 114: melm 245$c      
> Author,Author-in-order:w,Author-in-order:p,Author-in-order:s-->
>    <index_subfields tag="245" subfields="c">
>      <target_index>Author:w</target_index>
>      <target_index>Author-in-order:w</target_index>
>      <target_index>Author-in-order:p</target_index>
>      <target_index>Author-in-order:s</target_index>
>    </index_subfields>
> 
> (Here's a link to that file in the koha git repository: 
> http://git.koha-community.org/gitweb/?p=koha.git;a=blob;f=etc/zebradb/marc_defs/marc21/biblios/biblio-koha-indexdefs.xml;h=b3b12a0e2b12239c35a671325407a73e5db364e9;hb=HEAD)
> 
> That's only half of the story, because Koha doesn't use the raw zebra 
> indexes... it actually uses the ccl.properties file for the indexes that 
> you see in the url... for instance, here's the entry in ccl.properties 
> for 'author':
> 
> Author 1=1003 s=pw
> au Author
> 
> The first line has the zebra index definition as well as the bib-1 
> attribute (used in z39.50). The second line is creating the alias 'au' 
> for Author.
> 
> so, when you look at the url for an author search, you'll see something 
> like idx=au,phr
> 
> ... to trace that back to the indexdefs, you would look up "au" and 
> "phr" in ccl.properties, find the zebra index name there, and then back 
> up to the indexdefs.xml file.
> 
> That's not the whole story, but it's enough for most cases.
> 
> --Barton