[Koha] Mapping MARC21 to Advanced Search

[Rubén Fernández Asensio]

Hello all,
I'm trying to plan the cataloguing requirements for our Esperanto 
library, and since we don't have to follow any other library's 
standards, we don't want to type more that strictly needed. My goal is 
cataloguing according to the information our own users will be able to 
retrieve from the Koha OPAC, no more, no less.

However, the mapping of MARC21 fields to Advanced Search Options seems 
to be undocumented.

For example, what field is used to search by language or publisher 
location? Why the "Content" option doesn't match character 33 of field 
008? In the search field, what's the exact meaning of "Subject and 
broader terms", "Subject and narrower terms", "Subject and related 
terms", and "Curriculum"? Where are you supposed to input that when 
cataloguing?

Sorry if my questions are naive, I'm just an amateur sysad and amateur 
librarian working in my spare time for a nonprofit.

Rubén Fernández