Bug 29252 - Document the uses of 942c (MARC21)
Summary: Document the uses of 942c (MARC21)
Status: CLOSED FIXED
Alias: None
Product: Koha
Classification: Unclassified
Component: Documentation (show other bugs)
Version: Main
Hardware: All All
: P5 - low enhancement (vote)
Assignee: Bugs List
QA Contact: Testopia
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-10-15 14:21 UTC by Caroline Cyr La Rose
Modified: 2023-12-28 20:42 UTC (History)
0 users

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Description Caroline Cyr La Rose 2021-10-15 14:21:24 UTC
There was a discussion on the mailing list about the reasons of 942c.

See this thread : https://lists.katipo.co.nz/pipermail/koha/2021-October/056838.html

>Good afternoon,
>
>I recall reading (in the Koha manual?) the explanation for why it is
>advantageous to define Koha item type in the bib 942 field.  I believe it
>has to do with exporting records, or the scope of records that is included
>when doing some type of report?  I'm trying to locate that information
>again, but can't find it for the life of me.
>
>Does this seem familiar to anyone?  Thanks.
>
>
>Tasha Bales

------------

>I can't find the information right now, though I know I've seen it somewhere.

>My understanding is when importing a MARC record, 942$c is treated as the
>item type in the bibliographic record, and 952$y is the item type
>for the item record (assuming a 952 holding field was present).
>
>I have also observed that when you create a new item record from an
>existing bib record, 942$c gets copied into the new item's type.  So
>it's helpful to make sure that the item type in the bib record was set
>correctly when it was created (or imported).
>
>This wiki page talks about 952, but not 942:
>
>https://wiki.koha-community.org/wiki/Holdings_data_fields_(9xx)
>
>I'm sure someone more knowledgeable can correct this if I'm wrong.

--------------------


>942$c - defines the type of material the bibliographic record represents,
>sort of like it's GMD (general material description). Has no bearing on
>circulation of material. Stored as marcxml in biblio_metadata.
>
>952$y - defines the item-level item, and is used mandatorily for Koha's
>circulation rules which work as a permutation of (a) branchcodes (b) patron
>categories and (c) item-level item types. Stored as itype column in items
>table.
>
>Hope this helps
>Indranil

---------------------

>952$y is mandatory for circulation IF item-level_itypes is set to "specific >item". Otherwise, 942$c is used as the item type for circulation.
>
>Another thing that I have observed about 942$c is that it is indexed for the >search in the same way as 952$y. So if you have records without items (for >journal articles, websites or ebooks for example), these will still be >searchable through the item type filter.
>
>Also, if 942$c and 952$y are not the same in one record (for example, 942$c is >Book and 952$y is Reference), they will show in the results of a search for >either type.
Comment 1 Caroline Cyr La Rose 2023-05-11 20:38:39 UTC
This was done a while ago. https://koha-community.org/manual/23.05/en/html/cataloging.html#c-koha-item-type