<h1>Koha to MARC Mapping</h1>

<h1>Koha to MARC mapping</h1>

<p>While Koha stores the entire MARC record, it also stores common fields for easy access in various tables in the database. Koha to MARC Mapping is used to tell Koha where to find these values in the MARC record. In many cases you will not have to change the default values set by in this tool on installation, but it is important to know that the tool is here and can be used at any time.</p>

<p>While Koha stores the entire MARC record, it also stores common fields for easy access in various tables in the database. Koha to MARC mapping is used to tell Koha where to find these values in the MARC record. In many cases you will not have to change the default values set during installation. If you decide to change mappings here, make sure that you know what you are doing! We would recommend to test such changes first in a non-production environment.</p>

<p>The Koha to MARC Mapping page offers you the option of choosing from one of three tables in the database to assign values to.</p>

<p>Historically, the Koha to MARC mappings have been the same throughout all frameworks. But note that it was possible (before) to add or remove a mapping in an individual framework via Administration/MARC bibliographic framework. Since we consider the Default framework as authoritative for these mappings, this form shows the mappings in Default and applies changes to all frameworks.</p>

<p>After choosing the table you would like to view, click 'OK.' To edit any mapping click on the 'Koha Filed' or the 'Edit' link.</p>

<p>The mappings are found in three tables: biblio, biblioitems and items.</p>

<p>Choose which MARC field you would like to map to this Koha Field and click the 'OK' button. If you would like to clear all mappings, click the 'Click to "Unmap"' button.<p>

<p>In order to add a mapping for a specific Koha field, click the Add button on the corresponding line in the table. You will be asked to enter a field number and a subfield code. In order to remove a specific mapping, click the Remove button on the corresponding line. Both changes (add, delete) are applied immediately.</p>

<p style="color: #990000;">Important: At this time you can map only 1 MARC field to 1 Koha field. This means that you won't be able to map both the 100a and the 700a to the author field, you need to choose one or the other.</p>

<p>The tool now supports multiple mappings too for one Koha field. As an example, you can connect copyrightdate to 260$c as well as 264$c (the RDA equivalent). Since a record normally only contains only one of them, this one value will be found in copyrightdate. (Multiple values would be saved, separated by vertical bars.) Note that you cannot add/remove mappings for biblionumber, biblioitemnumber or itemnumber. You are not recommended to change them.</p>

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