Steps
- Create an authorised values categorie
 - Add a new authorized value to a list
 - Add the authorised values list in the cataloging framework
 
Add the authorised values list in the cataloging framework
1 Go to Administration > MARC bibliographic frameworks

- Choose the framework to edit, click “Actions” and choose “MARC structure”
 

- Search for the field to edit
 

- Click “Actions” on the right and choose “Edit subfields”
 

- Click the sudfield’s tab
 - Click “Other options”
 - Click the drop-down menu next to “Authorized value” and choose the authorized value category created above.
 

- Click “Save changes”
 - Check the subfield table, in the “Constraints” column, it should say “Auth value” followed by the chosen list
 

When cataloguing, there will be a drop-down menu in the subfield.
